Microfiche information retrieval and control system utilizing machine readable microfiche and visually readable microfiche
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is related to our co-pending application, Ser. No. 922,798, filed July 7, 1978, now allowed. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to microfiche information retrieval techniques, and is more particularly concerned with the provision and retrieval of digital information on a microfiche card, which information is to be retrieved for data processing purposes in, for example, a parts management and inventory control system or in an accounts management and checking system. 
     2. Description of the Prior Art 
     It is well known in the art to provide control information on reel or cartridge or microfilm to identify frames along the length of the microfilm. This information may be in the form of alphanumeric characters which are visually read on a trial and error basis until the desired frame is properly positioned for reading in a viewer. It is also well known in the art to place control information along the edge of a strip of microfilm to be read by an optical scanner in order to place a desired frame within the viewing field of a viewer. It is also known in the art to mechanically address and position a microfiche transport, on an x-y basis, in order to register a desired frame of information within the viewing field of a viewer; however, mechanical techniques are expensive, and the expense increases with increased accuracy of registration. 
     With respect to microfiche cards used in parts management and inventory control systems, such as may be used in the retail, automotive and farm equipment industries, or accounts, credit check and signature card systems in the banking industry, a card is placed on an x-y transport, generally manually operated, and the desired frame is obtained, again by a trial and error method through repeated repositionings of the card until the desired frame appears on the viewer. 
     Heretofore, microfiche cards have been limited to providing, in conjunction with parts catalogues and the like, visually readable graphic illustrations and/or alphanumeric information, such as generally found in retail catalogue and parts ordering systems. 
     To generally sum up the state of the art, alphanumeric and digital codes have been provided on reel-type microfilm for visual or electronic observation, while microfiche cards have been provided with visual indicators to identify the position of a frame within a matrix of frames on a card. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide a management system for parts and accounts information retrieval. 
     A more specific object of the invention is to provide a microfiche information retrieval system which utilizes a data base which is easily and inexpensively up-dated. 
     Another specific object of the invention is to provide a new and improved parts management and inventory control system. 
     Another specific object of the invention is to provide a new and improved bank and credit account information checking system. 
     According to the invention, two basic types of cut microfiche, hereinafter simply called microfiche or microfiche cards, are provided as a data base. One type of microfiche card, called a &#34;viewer microfiche&#34;, bears graphic information and digital information, the differences between such information being discussed below. In a parts management and inventory control system two types of viewer microfiche are provided: 
     (1) A &#34;parts&#34; microfiche which bears graphic information concerning parts, such as an exploded view of a pump or the like, and parts identification and location information; and 
     (2) A &#34;master&#34; microfiche which bears the manufacturer&#39;s part numbers and related system locator numbers. 
     The second type of microfiche is a totally digital microfiche which bears machine readable codes. More specifically, in a parts management and inventory control system (PMIC) the second type of microfiche is called a &#34;price&#34; microfiche and bears digital codes which indicate manufacturer&#39;s part number, locator number, current price and if the part is presently in stock. 
     The locator number may serve two purposes: 
     (1) Identify the correct price microfiche and provide an address for the information concerning the part being investigated; and 
     (2) Provide a physical location of the part in the dealer&#39;s warehouse. 
     The PMIC system and related banking and retail catalogue systems are based upon a concept disclosed in and claimed in our aforementioned co-pending application, having the following features: 
     (1) Microfiche cards bear digital information which may be of several types and may be employed in conjunction with graphic information; 
     (2) The digital information on a microfiche card may be employed in conjunction with an optical scanner for locating a certain area on the card, which area may contain digital or graphic information; 
     (3) The microfiche card, in conjunction with a scanner, locates a desired area to be scanned and adjusts the scanner or card transport, if necessary, with respect to skew so that the scanner and the information to be read are in accurate alignment; and 
     (4) Apparatus is provided for accurately locating a microfiche card with respect to a scanner, including structure for controlling operation of the scanner so as to detect positioning marks on the card which, after positioning, control the position of the card and/or scanner transport. 
     A microfiche card generally includes a header and a body. The header usually bears some type of text which identifies the card and its general content, while the body of the card bears the information sought to be retrieved. As has been indicated above, and as will be more fully appreciated from the detailed discussions below, the information to be retrieved may be graphic information or, according to the present invention, digital information. 
     More specifically, in a PMIC system, a master microfiche has a header comprising a sequential range of manufacturer part numbers and the body of the microfiche comprises the individual part numbers and the respective corresponding system locator numbers. The locator numbers may denote physical stock locations, as well as serve the primary function of identifying the corresponding price microfiche and addresses of the price microfiche inventory and price information. 
     A parts microfiche has a header which carries manufacturer model and part numbers, while the body bears graphic information concerning the parts, manufacturer part number, general descriptions of the parts, and corresponding locator numbers. 
     The price microfiche bears a price microfiche number on the header, while manufacturer number information and current sale price are carried on the body portion of the microfiche. 
     In banking and credit check applications, as will be understood from the detailed description below, a digital microfiche (corresponding to a PMIC price microfiche) may include account information in a machine readable form only, and may be accessed by appropriate addressing, such as by bank or credit card account number, and provide an account check in complete privacy from all persons, including the clerk or teller, as the case may be, who is seeking such information. 
     It should be noted that, as used herein, &#34;digital information&#34; is generally meant to identify marks, either opaque-on-clear or clear-on-opaque, while the term &#34;graphic information&#34; is generally meant to identify all other forms of information including alphanumeric information, drawings and the like. Also, contrasting colors may be used for digital and/or graphic information when such display is desired, such as for example in television applications. 
     In the context of a parts management and inventory control system, the present invention may advantageously be embodied in a system which comprises the aforementioned master, parts and price microfiche and apparatus for retrieving the information stored on such microfiche. In such a system, a viewer microfiche (master of parts) is positioned in a viewer, addressed and read to find a pertinent locator number which is assigned to a part being investigated. The locator number includes a price microfiche identification number to identify the pertinent price microfiche. The price microfiche is selected and placed in a scanner. Then, the locator number is keyed into the system to cause the scanner to access the price inventory information concerning that particular part. Finally, upon command, the price and inventory information is displayed by means of, for example, a light emitting diode (LED) display unit. If a sale or parts order is made, the system is provided with a printer for making a permanent record of the transaction and, in the case of an order, or a cancellation due to newly-received previously ordered parts, the transaction information is stored, at least on a temporary basis, for later communication to a central parts management computer. Such storage may advantageously be made with a magnetic tape unit and communicate to the central computer by way of the commercial telephone network by utilizing either a modulator-demodulator (MODEM) unit or a coder-decoder (CODEC) arrangement. All digital inter-unit and inter-network transmission may be accomplished with a specific digital code, such as the ASCII code. 
     A price microfiche, also called a &#34;scanner&#34; microfiche is intended to define a convenient, read-only, transportable, filable, data base constructed in standard microfiche form. The microfiche may bear written, graphic, audio or other information. The scanner microfiche may carry the information in digital or analog form and can be read with a scanner, transformed electronically to any desirable form, and can be displayed or used in any desired manner, or can be read with a TV camera and processed as a standard TV picture of signals. When the scanner microfiche is employed to provide data for another machine, (such as a computer) to accept and store, the entire microfiche may contain data only, an incremental encoding, as disclosed below, is not needed, except perhaps for initial alignment or periodic alignment purposes. A viewer microfiche is also a convenient, read-only, transportable, filable, data base in standard microfiche form. The information content may be written, graphic, audio, or other information. In contrast to the scanner microfiche, however, it is intended that the viewer microfiche have the information to be retrieved by projection onto a viewing screen. 
     With respect to the scanner microfiche, by using CON techniques, the present invention utilizes the possibility of generating, &#34;printing&#34; and distributing digital information at less expense and at greater speed than heretofore known. A particular advantage of all the microfiche cards used in the present invention is that information may be distributed, and up-dated, by mail, on an inexpensive basis, to provide a current inexpensive data base. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Other objects, features and advantages of the invention, its organization, construction and operation will be best understood from the following detailed description, taken in conjunction with the accompanying drawings, on which: 
     FIG. 1 is a schematic pictorial representation of a parts management and inventory control system constructed in accordance with the present invention; 
     FIG. 1A is a fragmentary view of the digital display of the apparatus of FIG. 1, shown in greater detail; 
     FIG. 1B is a schematic representation of the scanner as applied to bank account and credit account status checking; 
     FIG. 1C is a schematic representation of a scanner as a part of a computer for programming the computer; 
     FIG. 2 is a fragmentary view of a portion of a master (viewer-type) microfiche: 
     FIG. 3 is a fragmentary view of a portion of a parts (viewer-type) microfiche; 
     FIG. 4 is a plan view of a portion of a digitized scanner (price) microfiche which is illustrated in FIG. 5, the information illustrated thereon being hand-generated digital information; 
     FIG. 6 illustrates a portion of another scanner (price) microfiche, similar to that illustrated in FIG. 5, on which the digital information is COM-generated information; 
     FIG. 7 is a schematic block diagram of a system for aligning and reading a microfiche card of the type illustrated in FIGS. 4-6, with a scanner sensor; 
     FIG. 8 is a plan view of a portion of viewer microfiche card which has alignment and locating tracks in the grid between the viewable information frames; 
     FIGS. 9-11 illustrate scanning, alignment and frame-finding techniques which may be employed in conjunction with the viewer microfiche card of FIG. 8, including proper tracking, frame centering and frame cornering; 
     FIG. 12 illustrates the use of auxiliary codes on a viewer microfiche card; 
     FIG. 13 illustrates the use of redundant auxiliary codes on a viewer microfiche card; and 
     FIG. 14 is a schematic block diagram of a system for transporting and accurately positioning a viewer microfiche card for subsequent viewing, and for controlling and reading a scanner (price) microfiche. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Inasmuch as a plurality of different aspects of the invention are discussed below for accurately aligning and reading microfiche cards, these techniques will be discussed separately in accordance with the following outline. 
     I. GENERAL SYSTEMS CONCEPTS 
     A. PMIC Systems Concepts 
     B. Banking and Credit Check Systems Concepts 
     II. SCANNER MICROFICHE 
     A. Control Data and Output Data 
     B. Reading Scanner Microfiche 
     III. VIEWER MICROFICHE 
     A. Tracking 
     B. Stop At Frame Center 
     C. Stop At Frame Corner 
     D. Auxiliary Codes 
     E. Reading Viewer Microfiche 
     F. Exemplary Program 
     IV. COMBINED DIGITIZED AND VIEWER MICROFICHE INFORMATION RETRIEVAL 
     A. Parts Management and Inventory Control Example 
     V. SINGLE MICROFICHE CONTROL SYSTEMS 
     A. Banking and Credit Check Examples 
     B. TV Applications 
     C. Computer Program 
     I. GENERAL SYSTEMS CONCEPTS 
     A. PMIC Systems Concepts 
     The PMIC system was designed with an overall view of improving product or parts management and inventory control. More specifically, the PMIC system services seven areas which are critical to efficient parts management and inventory control, namely: 
     (1) parts are identified; 
     (2) prices are found rapidly; 
     (3) parts are retrieved quickly from stock with bin numbers provided by the system; 
     (4) records are made of the day&#39;s transactions; 
     (5) parts are ordered from a central location, preferably via a central computer; 
     (6) orders are fulfilled; and 
     (7) critical information such as availability, substitution and price change are kept up-to-date. 
     The importance of each of these areas become readily apparent when one considers the fact that a customer must be quickly serviced, the dealer must have complete records of his sales, orders and inventory, as well as up-to-date price and substitution information, and the central warehouse must be provided, not only with orders, but also with the fact that orders have been received and should not be carried as back-ordered parts. 
     B. Banking and Credit Check Systems Concepts 
     A customer&#39;s account may be checked, upon the presentation of a personal check or credit card, for example, by utilizing the account number to address a digitized scanner microfiche. The information read from the fiche may readily be converted into alphanumeric account identification and account status information and displayed on a LED unit, with complete privacy as to the name of the customer. In this manner, rapid credit checks can be made through the simple use of digitized microfiche cards, and a scanner which has an input keyboard and an output display unit. It is also possible to place bank account signature cards on viewer microfiche and key in the customer&#39;s account number so as to compare an endorsement or a withdrawal slip, for example, with the signature of the customer as seen on the viewer. 
     Inasmuch as the scanner microfiche, the viewer microfiche and information relating to proper alignment, addressing and tracking have been covered in our aforementioned co-pending application, the same information is provided immediately below so as to aid in understanding the present invention, the discussion of which will follow in connection with FIGS. 1, 1A, 2 and 3, with a reversion to FIGS. 7 and 14. 
     II. SCANNER MICROFICHE 
     Before continuing with a discussion of viewer-type microfiche, and because an operating program immediately follows the discussion of the viewer microfiche, attention is directed to FIGS. 4-7 which illustrate various techniques of manually-generated and COM-generated data, and techniques for ensuring alignment between the data to be retrieved and a sensor. 
     A. Control Data and Output Data 
     Referring first fo FIGS. 4 and 5, a microfiche card 50 is generally illustrated in FIG. 5 as comprising a body 52 composed of a plurality of information storage areas 54, and a header 56. 
     In the associated scanner apparatus, discussed in greater detail below, a linear photosensor is oriented transversely to the long dimension of the microfiche. 
     In apparatus which has been constructed, the sensor is placed in direct contact with the microfiche card. However, an optical system may be employed to project the microfiche images on a sensor. The use of an optical system is determined by the particular application. 
     The sensor may comprise a single continuous line of photocells fabricated as a single unit that spans the entire width dimension, 105 mm for example, of the microfiche card, or the sensor can be constructed of any number of segments, each segment containing a number of photocells, with the segments fabricated as a single unit that spans the entire 105 mm dimension of the microfiche card. The sensor can also be constructed of a single segment, or a number of segments, that span less than a full width of the microfiche card, or a matrix of cells which can sense a block of data, or a linear sensor in combination with a TV camera. 
     The light source that activates the sensor is located on the same side of a microcard as the sensor, whereas in microfiche applications the microfiche is located between the source and the sensor. 
     The entire sensor is moved left-to-right or right-to-left in the long direction of the microfiche. This is, of course, relative motion and in actual practice either the sensor or the card may be the moving element. As will be discussed below, logic circuits control the rate and mode of movement of the sensor. 
     As will be greatly appreciated by those skilled in the art, the sensor (or the transport) is mounted with a pivot, located at the upper end in the case of the sensor, and a device to move the bottom end of the sensor either left or right is provided to bring the sensor in complete alignment with a single vertical line of data that is to be read. The drives discussed herein with reference to block diagrams may advantageously with worm gear mechanisms and may utilize, for example, 2 DC servomotor manufactured by Transcoil, Inc., Part Number K-21-5540-3-2-6-3. 
     Referring to FIG. 4, a schematic illustration of a storage area 54 illustrates manually-generated information. Inasmuch as this sample was manually generated, continuous bars have been employed in portions of the coding. The same microfiche card can be generated by COM techniques, in which case the bars would not necessarily be continuous. 
     The example of a scanner microfiche card illustrates in FIGS. 4 and 5 contains all digital data and is not typical in the sense that all frames are identical and widely spaced. 
     In a practical scanner microfiche card of this type, centering marks, incremental encoding and start of data codes would be placed only at the top row of frames, and the end of data and bottom sensor alignment codes would be placed only at the bottom row of frames, these codes being shown in FIG. 4 on both sides of the area 54 to aid in understanding the invention. In a microfiche card of this type, there would be very little unused space. 
     Referring to the storage area 54 illustrated in FIG. 4, the data which is to be retrieved from the microfiche card are provided as opaque-on-clear or clear-on-opaque marks, here opaque-on-clear marks, in the form of rows of data 58 which are aligned transversely of the microfiche card. Again, contrasting colors can be used. 
     The card bears a plurality of centering marks 60, each of which is aligned with a respective data row 58. The microfiche card also carries incremental and coding data 62, a start of data code 64, the data field 66, and end of data code 68 and bottom sensor alignment codes 70. 
     With the exception that the end of data code 68 and the bottom sensor alignment codes 70 are actually provided physically displaced on the codes 60, 62 and 64 on a card, the card is laid out in a plurality of elongate data rows 0-80. It is the incremental encoding 62, however, which identifies and forms the addresses of the data rows 58. 
     Referring to FIG. 5, a storage area 54&#39; is illustrated. This storage area is quite similar to that of FIG. 4, with the exception that the data field, generally indicated at 78, is COM-generated data. This data may also be manually generated. In addition, with this type of microfiche card, although the same may be employed in the same manner as that of FIG. 4, may be employed as a programming tool in which the data 78 is to be fed step-by-step into another machine, such as a microprocessor, computer or the like. In this case, since it is not necessary to access a particular row, the encoding and alignment codes may be provided to ensure alignment at the first data row, such as indicated at 74 and at some other or periodic point or points, such as illustrated at 76. The use of the encoding and alignment marks will be best understood from the following detailed description of reading a scanner microfiche card. 
     B. Reading Scanner Microfiche 
     When certain information is selected for retrieval, the logic circuits of the scanner apparatus cause the sensor to move across the microfiche card toward the selected data and the logic circuits remember the position of the sensor at all times. 
     The sensor first moves to the transverse column of frames within which the selected line of data is to be found. After locating the proper column of frames, the sensor advances until it detects the incremental code within that frame defines the address of the selected data. The sensor then moves ahead until it detects the centering mark for that selected incremental code. The centering mark ensures that at least the top of the sensor will be in alignment with the codes at the selected address. 
     The logic circuits now compare bits 5-8 of the incremental code in the top longitudinal rows to bits 77-80 in the bottom longitudinal rows. If these bits do not correspond, bit for bit, the sensor is rotated in the proper direction, as determined by the logic circuits that compare the bits, to achieve alignment with the entire selected transverse data row 58. 
     When the bits 5-8 correspond, bit for bit, with the bits 77-80, the sensor has achieved alignment with the selected transverse data row. As previously mentioned, the sensor is pivotally mounted; however, in the alternative the transport may be pivotally mounted. 
     The sensor is now operated to scan the data transversely of the row aligned therewith and makes use of the information codes that are between the start of data code and the end of data code. Any portion of the data between the start of data code and the end of data code may be used, or ignored, as controlled by the logic circuits. 
     Referring now to FIG. 7, a more detailed discussion of access and alignment will be given for the scanner microfiche card. In FIG. 7 a keyboard 82 is provided for the user to enter a desired address and an activating order. The keyboard may be a scanned type arrangement as is common in the art, or may be constructed using, for example, a MOSTEK MK 50311 N four function calculator circuit, the necessary additional switches (PRICE, etc.) and a keyboard integrated circuit such as the S 9262 touch control interface manufactured by American Microsystems, Inc. The address is fed to and held in an entry register 84 and the activating order is fed to a lock 86 for sequence control. The clock 86 is also connected to other elements than illustrated in the drawing, which connections have been omitted for the purpose of clarity, the same being understood to those skilled in the art. 
     After an address has been entered and an activating order given, a column counter 104 and a comparator register 88 determine which direction to drive the sensor to the selected column. 
     After the sensor has found the selected column, the sensor steps ahead until the incremental code it reads compares bit-for-bit with the selected address, then the sensor is stepped ahead in smaller increments until the centering mark of the desired column is detected. The sensor then stops. 
     It should be noted that the sensor 98 may count any one of the bars, such as the bar 72 to determine the proper frame, and the remainder of the marks of the code, for example, the longitudinal bars in rows 1-8 may be counted to determine the proper transverse row 58. 
     The incremental code and the sensor alignment code, both being identical, are compared in the comparator register 88 and the sensor 98 is pivotally adjusted, as indicated at 100, so that the codes compare bit for bit. 
     The entire vertical line of data, that is a data row 58, is now scanned and abstracted or used by the data processing circuits 96 for output to circuits which are to utilize the digital information. 
     The column counter 104 keeps track of the column in which the sensor is positioned. The increment counter selects the address out of the scanned data, and the sensor alignment register selects sensor alignment codes from the scanned data to control positioning of the sensor. The sensor position drive and the sensor alignment drive area elements which are well known in the art. 
     The entire circuit outlined in the broken line may be configured from a microprocessor of the type Motorola MC 6800 P or the Intel 8080 series, while the sensor register 102 may be formed of any standard well known register and the sensor 98 may be constructed from a well known device, such as the Fairchild CCD 17280. As already mentioned, the keyboard 82 and the entry register 84 are also devices which are well known to those skilled in the art. 
     It should be noted that the comparator register includes a portion identified ROM or RAM, for a read only memory (ROM) or a random access memory (RAM). This is because the microprocessor may include a ROM in which the program is &#34;wired&#34; in. With the aforementioned Motorola device, however, we selected a RAM and it is necessary to feed in a program when the power to the unit is turned on. As will be evident from the discussion below with respect to the viewer microfiche and the program for reading the viewer microfiche, programming of a RAM in a microprocessor or a &#34;wired-in&#34; program for a ROM is well within the skill of those versed in this art. 
     III. VIEWER MICROFICHE CARD 
     The viewer microfiche card is generally illustrated at 110 in FIG. 8 as comprising a plurality of frames 112 formed in a matrix and having spaces between the frames which are scanned by a sensor 114 which is positioned, for example at 45° with respect to the directions of movement of the microfiche card. In the spaces between the frames 112 a plurality of tracking lines 116, 118, 120 are provided in the longitudinal direction of the card and a plurality of tracking lines 122, 124 and 126 are provided in the transverse direction of the microfiche card. 
     The tracking and code system described herein is one selected for certain of our test purposes, and represents only one of many configurations this scheme can take while still providing the necessary tracking and coding functions. 
     As illustrated in FIG. 8, the tracking lines 116-126 are not in the viewing areas and are placed on the microfiche card in precise positions relative to the graphic information within the viewing areas 112. 
     When this microfiche card 110 is employed in a viewer, the lines are projected on the sensor 114 out of the viewing area. The sensor 114 may be constructed of approximately 40 individual photocells and is used to detect the lines and other data. The sensor 114, as mentioned above, is positioned at 45° to the tracking lines to allow a single sensor to detect both vertical and horizontal tracking lines, although two sensors at right angles to the tracking lines could be utilized to perform as well. 
     The tracking lines may be either clear lines with a black background, or vice-versa. We have planned to use clear lines with a black background; however, the system will work either way. 
     A. Tracking 
     Referring to FIG. 9, when the sensor is positioned with respect to the tracking lines 116, 118, 120, as illustrated at 114, all three tracks are sensed, and the microfiche card is in the correct vertical &#34;tracking&#34; position for accessing or viewing. If the sensor is in the position illustrated at 114&#39;, however, the pattern of photocells sensing the tracks allows the logic circuits to determine the direction the microfiche must be moved to bring the sensor back to the relative position of that illustrated at 114. In the alternative, if the sensor is in the position illustrated at 114&#39;, the pattern of sensing photocells will allow the logic circuits to determine that the microfiche card must be moved vertically in a direction opposite to that to correct for the position 114&#39;. 
     With the 45° orientation of the sensor 114, or two sensors oriented at 90°, the tracking scheme permits the vertical tracking lines 122, 124 and 126 to be followed in the same manner. 
     The tracking technique amounts to a dynamic, or feedback, registration system. 
     The sensor 114 and tracking line position can also be used to provide proportional control. That is, any misalignment, greater than a single cell of the sensor, with respect to the tracking lines, will produce an error signal that can be used to correct the microfiche card position. 
     B. Stop at Frame Center 
     Referring to FIG. 10, the tracking lines described above allow for moving the microfiche card in a precise matrix or grid pattern in order to automatically access single or partial frames from a microfiche card. 
     In order to stop at the proper location to allow a frame to be viewed, a frame center code, for example the code marks 124, 126 and 128 is placed between two of the tracking lines, for example the tracking lines 118 and 120, while a frame center bar is placed between both the top and middle, and the middle and bottom tracking lines, that is between the tracking lines 116 and 118, and between the tracking lines 118 and 120, here illustrated in the form of two marks 130 and 132. In FIG. 10 the reference 114 diagrammatically illustrates the center line of the sensor, while the line 122 diagrammatically illustrates the center line of the frame. With this coding, there are two channels, Channel A and Channel B provided in which the frame center code is located in Channel B and the frame center bar is located in Channels A and B. The frame center code corresponds to the address of the frame in the horizontal direction. 
     The microfiche card is moved in a direction such that the relative motion of the sensor is left to right in FIG. 10. As the sensor 114 passes over the frame center code marks 124, 126, 128, the sensor detects the three bits of the frame center code, which the logic circuits interpret to mean that the microfiche is to stop when the sensor detects the bit between the upper tracking line 116 and the middle tracking 118, that is in Channel A and the bit between the middle tracking line 118 and the bottom tracking line 120, which is in Channel B. 
     C. Stop at Frame Corner 
     Referring to FIG. 11, a corner of a frame may be detected in a manner similar to that discussed above with respect to FIG. 9. The tracking lines 116, 118, 120 and the tracking lines 122, 124, 126 generally come together at the corner of each frame. Therefore, in the longitudinal direction there is still a Channel A and a Channel B, while in the transverse direction there is a Channel AV and a Channel BV. A plurality of frame corner cord markings 126, 128 are provided in the Channel B and a plurality of frame corner code markings 140, 142 are provided in the Channel BV, while a frame corner bar is provided in Channel A and Channel B, as illustrated at 144, 146. In FIG. 11, the sensor, again symbolically illustrated at 114, detects the two frame corner codes 136, 138 as it passes thereover. The logic circuits then cause the transport to stop the motion when the frame corner bar 144, 146 is detected. 
     If downward vertical (transverse) motion is required after reaching a frame corner bar, the sensor 114 would be inhibited for a specific time and move downward. The time of inhibition is selected such that at the rate of motion utilized, the sensor would stand across all three vertical tracking lines before becoming active again. After becoming active, the sensor will &#34;track&#34; the vertical lines to its next point of action. 
     The logic program may ignore frame center codes and/or frame corner codes and/or any other codes that it may detect during travel along the tracking lines, until a selected point is reached. The distance between the points is measured, for example, by the rate of transport and by the time of transport. 
     D. Auxiliary Codes 
     Referring to FIG. 12, codes other than frame center codes, frame corner codes and frame corner and centers bars may be placed within any of the tracking lines in Channel A and/or Channel B. For example, in FIG. 12, Channel A includes a code which is provided by the marks 148, 150, 152, 154 and 156, while in Channel B a code is provided with the marks 158, 160, 162, 164 and 166. These codes may be used for an infinite number of purposes, such as frame numbering, frame content designation, branch designation, sound track selection (when used with a complementary audio component), access address to a scanner, and so on. As illustrated in FIG. 12, the codes may be placed in either one or both of the channels. 
     For extreme reliability requirements, redundant codes may be utilized, as illustrated in FIGS. 12. It will be noted that in Channel A there is a code provided by the markings 168&#39;, 170&#39;, 172&#39; and 174&#39; which is redundant with the code provided by the markings 168, 170, 172 and 174 in Channel B. For added reliability, a parity scheme will be used in addition to redundancy. 
     Although it has not been mentioned above, it should be readily apparent that all codes, including frame center codes and frame corner codes may take on an infinite variety of forms. 
     E. Reading Viewer Microfiche Card 
     Referring to FIG. 14, a system and a method for positioning a viewer microfiche card for reading is illustrated in which the apparatus comprises a keyboard 176 and an entry register 180 which are the same as similar elements illustrated in FIG. 7. The user keys in a desired address and an activation order, the address being deposited in the entry register 180 and the activation order being forwarded to the block 178 for sequence control. Again, the clock is illustrated as being connected only to certain components, while clock connections to other components have been omitted for purpose of simplicity. 
     After activating, the row register 194, via the comparator register 182, determines the vertical and horizontal direction in which the microfiche must be moved in order to bring the selected frame into the viewing position. The microfiche moves either vertically or horizontally, never diagonally in this system. 
     The tracking comparator 192 is fed by the sensor 188 by way of the sensor register 190 and compares the track position with a standard track position and controls the horizontal and vertical microfiche drives 186 and 184, respectively, to maintain tracking as discussed above so that the sensor extends over all three tracking lines in the particular direction which the microfiche is bring driven. 
     The sensor register provides an output 198 as the data output, which output may have interposed therein an auxiliary code register 200 which reads the auxiliary codes, such as are illustrated in FIGS. 11 and/or 12. 
     The sensor 188 may be a 40 or 60 element sensor of the type discussed above. The vertical and horizontal drives 184 and 186, as well as the keyboard 176 and 180 are well known to those skilled in the art, while the elements bounded by the broken line may be a conventional microprocessor, such as the Intel 8080A or the Motorola MC6800P. As with the apparatus of FIG. 7, the comparator register 182 includes a ROM or a RAM section for storing the program. In a particular device constructed and utilized we have employed the Motorola MC6800P microprocessor with a RAM section so that it was necessary to feed in the program each time the system was energized. 
     F. Exemplary Program 
     The following is an exemplary program for accurately positioning a viewer microfiche, or more importantly a desired portion of a viewer microfiche, with respect to a viewer. It should be understood by those versed in this art that a similar program, although a simpler program, may be employed in connection with the apparatus of FIG. 7 for accurate alignment of a data row 58 (FIGS. 4-6) in that the scanner microfiche is generally only operated by movement of the sensor (or transport) in a single direction, in addition to correction of skew by the pivoting of the sensor or the transport, and in connection with the additional apparatus of FIG. 14 which relates to reading with the scanner. 
     
         ______________________________________                                    
SYSTEM MONITOR                                                            
______________________________________                                    
21D BD MONITR:   JSR           Set up peripherals                         
OO                             for first move                             
OO                             Move to upper left                         
                               corner                                     
220 86 HOME:     LDAA #$3C     Select verimotor up                        
3C                             (Horiz. motor                              
                               already selected left                      
222 B7           STAA PIACRB                                              
80                                                                        
07                                                                        
225 86           LDAA #$FF     Both motors full                           
FF                             speed ahead                                
227 87           STAA PIAORB                                              
80                                                                        
06                                                                        
22A 20 GO:       BRA GO        Wait here while                            
FE                             user resets and                            
                               engages micro-                             
                               switches at end of                         
                               move                                       
______________________________________                                    
22C BD           JSR INIT      Reinitiate PIA&#39;s                           
OO                             after manual reset                         
OO                                                                        
22F 86 STRIPSN:  LDAA #$04     Routine to move to                         
02                             frame 01 start                             
                               position at left end                       
                               of horizontal                              
                               guidebar                                   
231 BD           JSR BAKHOM                                               
05                                                                        
234 20           BRA INITFRAME Initiate frame                             
37                             pointer to 01                              
______________________________________                                    
 
    
     
         __________________________________________________________________________
ROUTINE TO SCAN DATA OF ARRAY FOR                                         
POSITION AND SIZE OF ALL VALID FEATURES                                   
__________________________________________________________________________
246 BD                                                                    
     SCAN:    JSR SRCH     Get first feature                              
00                                                                        
1E                                                                        
249 CE        LDX #$00     Initialize feature array index                 
00                                                                        
00                                                                        
24C DF        STX CODEPTR  Save it                                        
F3                                                                        
24E 96                                                                    
     NEXFEAT: LDAA LITCNT  Feature there?                                 
F2 -250 2F    BEQ END      No - end of scan                               
17 -252 D6    LDAB CODEPTR+1                                              
                           Check for more than features,                  
F4                         to protect program from being                  
                           written over                                   
254 C1        CMPB #$08                                                   
08                                                                        
256 2E        BGT END      If more than five, out of                      
11                         focus - Go to re-read program                  
258 A7        STAA         Yes - Store its size in array,                 
F7            CODETABL+1,X then store its position                        
25A 96        LDAA FEATSTRT                                               
F1                                                                        
25C A7        STAA CODETABL,X                                             
F6                                                                        
25E 08        INX          Update pointer for next feature                
25F 08        INX                                                         
260 DF        STX CODEPTR  Save it again                                  
F3                                                                        
262 BD        JSR XTRACT   Extract next feature                           
01                                                                        
00                                                                        
265 DE        LDX CODEPTR  Retrieve pointer                               
F3                                                                        
267 20        BRA NEXFEAT                                                 
Go again                                                                  
E5                                                                        
269 39                                                                    
     END:     RTS                                                         
26A 00                                                                    
00                                                                        
00                                                                        
26D 86                                                                    
     INITFRAME:                                                           
              LDAA #$01                                                   
01                                                                        
26F 97        STAA PRESFRAME                                              
                           Present frame = 01                             
E2                                                                        
__________________________________________________________________________
User sets breakpoint                                                      
to key in desired                                                         
next frame                                                                
↓                                                                  
271 BD                                                                    
     ROUTE:   JSR NINES    Routine to calc, route to next                 
02                         frame - first convert next                     
C5                         frame input to row and                         
                           column format                                  
274 96        LDAA NEXFRAME                                               
                           To complete final hor, motion                  
E1                         use col. number of next frame                  
                           (lower half-byte) to index a                   
                           table indicating closest vert.                 
276 84        ANDA #$0F    bar to final row number                        
OF                                                                        
278 B7        STAA HERE                                                   
02                                                                        
7F                                                                        
27B CE        LDX ROUTEABL x contains base address                        
02                         of table                                       
BB                                                                        
27E E6        LDAB O,X     Load address of vertical                       
OO   HERE:                 bar into ACCB                                  
280 D7        STAB HORZ    Final hor. motion completed                    
A9                         as (NEXFRAME - Vertical)                       
                           Hor      Bar Address                           
                           ↑  ↑                               
                           ACCA     ACCB                                  
282 90        SUBA HORZ                                                   
A9 -284 97    STAA HORZ    Result is neg. for motion                      
A9                         to left, pos. for right                        
286 96        LDAA PRESFRAME                                              
                           Calc, first hor. motion                        
E2                         (present frame vert. bar)                      
288 84        ANDA #$OF                                                   
OF                                                                        
28A 97        STAA HOR1    As (Vert. bar PRESFRAME)                       
A7                         address  hor.                                  
                           ACCB     ACCA                                  
28C DO        SUBB HOR1                                                   
A7                                                                        
290 OO                                                                    
OO                                                                        
OO                                                                        
OO                                                                        
294 96        LDAA PRESFRAME                                              
                           Next, fetch row number of                      
E2                         present frame into lower                       
                           half-byte of ACCA with zeros                   
                           in upper half-byte                             
296 48        ASLA                                                        
297 48        ROLA                                                        
298 49        ROLA                                                        
299 49        ROLA                                                        
29A 49        ROLA                                                        
29B D6        LDAB NEXFRAME                                               
                           And same for row number                        
E1                         of next frame in ACCB                          
29D 58        ASLB                                                        
29E 59        ROLB                                                        
29F 59        ROLB                                                        
2AO 59        ROLB                                                        
2A1 59        ROLB                                                        
2A2 84        ANDA #$OF    Mask out upper half-bytes                      
OF                                                                        
2A4 C4        ANDB #$OF                                                   
OF                                                                        
2A6 D7        STAB VERT    Vet. motion computed as                        
A8                         (PRESFRAME - NEXFRAME)                         
                           Vert.    Vert.                                 
                           ↑  ↑                               
                           ACCA     ACCB                                  
2A8 90        SUBA VERT                                                   
A8                                                                        
2AA 97        STAA VERT    POS. = UP NEG. = DOWN                          
A8                                                                        
2AC 26        BNE DONE     Any vertical motion                            
09                         required?                                      
2AE 96                                                                    
     NOVERT:  LDAA HOR1    No - Combine HOR1, HORZ                        
A7                         into single horizontal                         
                           motion and store in HOR1                       
2BO 9B        ADDA HORZ                                                   
A9                                                                        
2B2 97        STAA HOR1                                                   
A7                                                                        
2B4 7F        CLR HORZ     No need for HORZ                               
00                                                                        
A9                                                                        
2B7 7E                                                                    
     DONE:    JMP NEXMOVE  ready to start move to                         
03                         next frame                                     
08                                                                        
2BB  ROUTETABLES           Gives frame address of                         
                           vertical route to be taken for                 
                           destination frame whose                        
                           column number is:                              
                           ↓                                       
2BC 01                     1                                              
02                         2                                              
03                         3                                              
04                         4                                              
05                         5                                              
06                         6                                              
07                         7                                              
08                         8                                              
2C4 09                     9                                              
                           Routine to convert between                     
                           decimal and row-column                         
                           format for frame numbers                       
2C5 96                                                                    
     NINES:   LDAA NEXFRAME                                               
                           ACCA gets converted                            
E1                                                                        
2C7 81        CMPA #$19    Is ACCA in row 1 or row 2?                     
19                                                                        
2C9 2D        BLT 1 or 2   Yes - Branch around                            
03                                                                        
2CB 7E        JMP PATCH 6  No - Continue checking                         
01                                                                        
E1                                                                        
2CE 81                                                                    
     1 or 2:  CMPA #$10    No - is ACCA in row 1                          
10                                                                        
2DO 2C        BGE .+3      No - Branch around                             
03                                                                        
2D2 7E        JMP LAST     Yes - No conversion required                   
05                                                                        
E7                                                                        
2D5 C6                                                                    
     .+3:     LDAB #$01    ACCB = Conversion amount                       
01                         = ±1 for row 2.                             
2D7 7D                                                                    
     DECIDE:  TST CONVRT   Which direction is                             
OO                         conversion desired?                            
A5                                                                        
2DA 7E        JMP PATCH 9  Go find out                                    
05                                                                        
D3                                                                        
01E1 81                                                                   
     PATCH 6: CMPA #$30    Is ACCA in bottom row?                         
30                                                                        
1E3 2E        BGT BOTTOM   Yes - Branch around                            
05                                                                        
1E5 C6        IDAB #$02    Convert by adding ±2                        
02                         for row 3                                      
1E7 7E        JMP DECIDE   Go decide on conversion                        
02                         desired                                        
D7                                                                        
1EA C6                                                                    
     BOTTOM:  LDAB #$-30   For bottom row, subtract                       
D0                         ±30 to convert                              
1EC 7E        JMP DECIDE                                                  
Go do it                                                                  
02                                                                        
D7                                                                        
5D3 27                                                                    
     PATCH 9: CONVERT      If decimal to row/col.                         
06                         desired, do addition                           
5D5 50        NEGB         If row/col. dec. desired,                      
                           do subtraction                                 
5D6 81        CMPA #$19    If, row 1, col. 9, then special                
19                         case - only subtract 1 instead                 
                           of 2                                           
5D8 26        BNE CONVERT                                                 
01                                                                        
5DA 4C        INCA         Add 1 to compensate                            
5DB 1B                                                                    
     CONVERT: ABA          Preform conversion here                        
                           (add ACCB to ACCA)                             
5DC 7E        JMP PATCH 10 Check for special decimal                      
03                         conversions of 19→21 or 21→19    
5DF 7D                                                                    
     STORE:   TST CONVERT  Should result be stored in                     
00                         NEXFRAME? (convrt = 0)                         
A5                                                                        
5E2 26        BNE LAST     No - Branch around                             
03                                                                        
5E4 97        STAA NEXFRAME                                               
                           Yes - Store it                                 
E1                                                                        
5E6 00                                                                    
5E7 7F                                                                    
     LAST:    CLR CONVRT                                                  
Auto clear flag (conversion                                               
00                         is decimal→row/col. by                  
A5                         default)                                       
5EA 39        RTS                                                         
All done                                                                  
__________________________________________________________________________
3AO C6                                                                    
     PATCH 10:                                                            
              LDAB #$06    Load decimal adjust term                       
06                                                                        
3A2 81        CMPA #$1B    Does conversion result equal                   
1B                         1B (19+ 2)?                                    
3A4 27        BEQ ADD      Yes - ADD decimal term,                        
05                         next                                           
3A6 50        NEGB         No - Negate decimal term for                   
                           next test                                      
3A7 81        CMPA #$1F    Does conversion result =  1F                   
1F                         (21-2)                                         
3A9 26        BNE BACK     No - don&#39;t adjust                              
01                                                                        
3AB 1B                                                                    
     ADD:     ABA          Yes - add decimal term                         
3AC 7E                                                                    
     BACK:    JMP STORE    Now go decide whether to                       
05                         store conversion result                        
DF                                                                        
                           Subroutine to search and                       
                           lock onto a hor. guidebar                      
2EO 96                                                                    
     FINDBAR: LDAA MINBAR                                                 
DB                                                                        
2E2 97        STAA BARTIME Load converter with min.                       
BO                         time to establish a valid bar                  
2E4 D6                                                                    
     REFIND:  LDAB OUTVIEW Which direction is search                      
AC                         desired? (outview = 0 for up,                  
                           1 for down)                                    
2E6 27        BEQ FARLEFT                                                 
04                                                                        
2E8 86        LDAA #$34    Down - Select vertical DIA                     
34                         down                                           
2EA 20        BRA .+2                                                     
02                                                                        
2EC 86        LDAA #$30    Select med. vertical                           
3C                         search speed                                   
2FO B7        STA PIACRB                                                  
80                                                                        
07                                                                        
2F3 F7        STAB PIAORB  Start motor                                    
80                                                                        
06                                                                        
2F6 80                                                                    
     LOOK:    JSR SRCH     Scan present input data                        
00                         for guidebar                                   
1E                                                                        
2F9 96        LDAA LITCNT  If found, LITCNT will                          
F2                         be 0                                           
2FB 27        BEQ FINDBAR  If not, reset bartime                          
E3                         and try again                                  
2FD 7A        DEC BARTIME  When found, advance timer                      
300 96        LDAA BARTIME Min. Time expired?                             
BO                                                                        
302 26        BNE LOOK     No - keep timing                               
F2                                                                        
304 7F        CLR PIAORB   Yes - bar found stop                           
80                         motor                                          
06                                                                        
30F 39        RTS          Return to caller                               
__________________________________________________________________________
                           PERFORMS NEXT HOR. MOVE:                       
320 96                                                                    
     HORIZONTAL:                                                          
              LDAA HOR 1   What kind of move is required?                 
A7                                                                        
322 27        BEQ HALT     None - up date frame pointers                  
4B                         and to back for user input                     
324 2B        BMI LEFTMOVE Left - branch here                             
0A                                                                        
326 86        LDAA #$3C    Right - Select direction                       
3C                         =  right                                       
                           DETERMINES NEXT MOVE                           
308 BD                                                                    
     NEXMOVE: JSR HORIZONTAL                                              
                           Do first hor. move                             
03                                                                        
20                                                                        
30B 96        LDAA VERT    Any vert. motion required?                     
A8                                                                        
30D 27        BEQ DEST     No - at destination, update                    
OA                         frame pointer                                  
30F BD        JSR VERT     Yes - do vert. move                            
03                                                                        
BO                                                                        
312 96        LDAA HORZ    Prepare for further hor.                       
A9                         move if necessary                              
314 97        STAA HORI                                                   
A7                                                                        
316 BD        JSR HORIZONTAL                                              
                           Then do it                                     
03                                                                        
20                                                                        
319 96                                                                    
     DEST:    LDAA NEXFRAME                                               
E1                                                                        
31B 97        STAA PRESFRAME                                              
                           New source in old destination                  
E2                                                                        
31D 7E        JMP CODES    Go read codes at destination                   
05                                                                        
23                                                                        
328 7C        INC HORI     Add in a dummy move so                         
00                         initially finding guidebar is                  
A7                         not counted as a frame when                    
                           moving right.                                  
32B 97        STAA HORDIR  Store direction data                           
DA                                                                        
32D 7E        JMP IGNR     Jump away from codes to                        
01                         find guidebar                                  
BD                                                                        
__________________________________________________________________________
330 86                                                                    
     LEFTMOVE:                                                            
              LDAA #$34    Store DIRECTION = LEFT                         
34                         (No dummy move required since                  
                           initially guidebar is advancing                
                           to next frame when left                        
332 97        STAA HORDIR  Store direction                                
DA                                                                        
334 20        BRA PREPULS  Determine whether long or                      
20                         short pulse is necessary, then                 
                           do it                                          
__________________________________________________________________________
336 86                                                                    
     IGNORE:  LDAA #$FF    Routine to pulse through                       
FF                         intermediate codes:                            
338 97        STAA PULSTIM Use max. pulse width                           
F5                                                                        
33A 96        LDAA HORDIR  Select proper direction                        
DA                                                                        
33C C6        LDAB #$08    Select med. hor. speed                         
08                                                                        
33E BD        JSR PULSE    Do the pulse                                   
01                                                                        
FO                                                                        
341 39        RTS          ;Back to caller                                
__________________________________________________________________________
0342 BD                                                                   
     REGET:   JSR REGISTER ;Now refind guiebar for next                   
03                         frame                                          
344 70                                                                    
347 96        LDAA HOR1    Update frame counter                           
A7                                                                        
349 2B        BMI INCR     In which direction?                            
03                                                                        
34B 4A                                                                    
     DECR:    DECA                                                        
Down if positive                                                          
34C 20        BRA .+1                                                     
01                                                                        
34E 4C                                                                    
     INCR:    INCA                                                        
Up if negative                                                            
34F 97        STAA HOR1    Store it                                       
A7                                                                        
351 27        BEQ STOP     All done if count is zero                      
15                                                                        
353 BD        JSR CENTER   Now guide along bar to move                    
00                         along next frame                               
53                                                                        
__________________________________________________________________________
368 86                                                                    
     STOP:    LDAA #$34    Select direction = left                        
34                                                                        
36A 97        STAA HORDIR                                                 
DA                                                                        
36C BD        JSR CENTER   Guide left along bar to have                   
00                         position at left edge                          
53                                                                        
36F 39                                                                    
     HALT:    RTS          Return to monitor for next                     
                           move                                           
356 96                                                                    
     PREPULS: LDAA NEXFRAME                                               
                           ;Start calc. trigger                           
E1                         ;Frame for long code ignore                    
                           pulse                                          
358 D6        LDAB HORDIR  ;Which direction are we going?                 
DA                                                                        
35A C1        CMPB #$34    ;If left, HORDIR = 34                          
34                                                                        
35C 27        BEQ .+1      ;If left, trigger frame =                      
01                         present frame (Do not                          
                           increment to next frame)                       
35E 4C        INCA         ;If right, trigger frame =                     
                           next frame                                     
35F 90                                                                    
     .+1:     SUBA HOR1    ;Calc. present horizontal                      
A7                         ;position to check if at trigger               
                           ;frame (= NEXTFRAME-HOR1)                      
361 7E        JMP PATCH 3  ;Now finish calc. check                        
01                         ;for doing the long pulse, and                 
CO                         ;pulse around the codes                        
THIS PATCH DETERMINES WHETHER FICHE IS                                    
GOING TO JUMP OVER TO RIGHTMOST COLUMN                                    
(COL.9) AND IF NOT GOES AHEAD AND DOES A                                  
LONG PULSE TO GET OVER CODES (IF COL. 9,                                  
LONG PULSE WOULD RUN INTO MECHANICAL STOP                                 
1CO OO                                                                    
     PATCH 3:              ;Frame number after this jump                  
OO                         ;is already in ACCA                            
OO                                                                        
OO                                                                        
OO                                                                        
1C5 84        ANDA #$OF    ;Select column from                            
OF                         ;frame number                                  
1C7 81        CMPA #$09    ;Is it right most column?                      
09                                                                        
1C9 27        BEQ IGNR     ;If so, do a short jump                        
10                         ;only                                          
1CB 00                                                                    
00                                                                        
00                                                                        
00                                                                        
1CF 86        LDAA #$01    ;Initialize a counter to                       
01                         ;do 1 pulse                                    
1D1 97                                                                    
D4            STAA PULSNMR                                                
1D3 BD                                                                    
     MORE:    JSR IGNORE   ;Do the pulse                                  
03                                                                        
36                                                                        
1D6 7A        DEC PULSNMR  ;Count it off                                  
00                                                                        
D4                                                                        
1D9 26        BNE MORE     ;Not done - then pulse some more               
F8                                                                        
1DB BD                                                                    
     IGNR:    JSR IGNORE   ;Get around remaining codes                    
03                                                                        
36                                                                        
1DE 7E        JMP REGET    ;Go find the                                   
03                         ;bar again                                     
42                                                                        
__________________________________________________________________________
 
    
     
         __________________________________________________________________________
ROUTINE TO REGISTER CENTER BAR                                            
AT START OF NEXT FRAME                                                    
370 7F                                                                    
     REGISTER:CLR PULSTIM                                                 
                     Start with min. vert.                                
00                   sweep from present                                   
FS                   position                                             
373 96                                                                    
     SWEEP: LDAA PULSTIM                                                  
                     Initiates a new sweep                                
F5                                                                        
375 8B                                                                    
     ADDA #$08       By incrementing the sweep                            
F5                   timer                                                
377 97                                                                    
     STAA PULSTIM                                                         
F5                                                                        
379 B6                                                                    
     LDAA PIACRB                                                          
80                                                                        
07                                                                        
37C 81                                                                    
     CMPA #$34                                                            
34                                                                        
37E 27                                                                    
     BEQ .+4                                                              
04                   Switch vertical directions                           
380 86                                                                    
     LDAA #$34                                                            
34                                                                        
382 20                                                                    
     BRA .+2                                                              
02                                                                        
384 86                                                                    
     .+4: LDAA #$3C                                                       
3C                                                                        
386 97                                                                    
     .+2: STAA SAVZ  Save direction for additional                        
EB                   pulse when bar found                                 
388 C6                                                                    
     LDAB #$30       Select med. slow motor speed                         
30                   for narrow sweep range                               
38A 7C                                                                    
     INC SRCHFLAG    Flag to search for data                              
00                   during pulse                                         
AG                                                                        
38D BD                                                                    
     JSR PULSE       Go do it                                             
01                                                                        
FO                                                                        
390 96                                                                    
     LDAA LITCNT     Result of pulse?                                     
FZ                                                                        
392 27                                                                    
     BEQ SWEEP       No data yet - Go again                               
DF                   ;Additional pulse after                              
                     registering bar, to make sure                        
                     bar is in view and prevent                           
                     misleading end of condition                          
                     by center                                            
394 86                                                                    
     LDAA #$01                                                            
01                                                                        
396 97                                                                    
     STAA PULSTIM    ;Small size pulse                                    
F5                                                                        
398 96                                                                    
     LDAA SAVZ       ;Load same motor direction                           
FB                   as before                                            
39A C6                                                                    
     LDAB #$20       ;Slow motor speed                                    
20                                                                        
39C BD                                                                    
     JSR PULSE       ;Do the pulse                                        
01                                                                        
FO                                                                        
39F 39                                                                    
     RTS             ;End of register routine                             
                     Performs next vert. move                             
3BO 96                                                                    
     VERTICAL: LDAA VERT                                                  
                     What direction required?                             
AB                                                                        
3B2 2B                                                                    
     BMI DOWNMOVE    Choose proper vert. direction                        
03                   for FINDBAR ROUTINE                                  
3B4 4F                                                                    
     CLRA                                                                 
3B5 20                                                                    
     BRA STORE                                                            
02                                                                        
3B7 86                                                                    
     DOWNMOVE: LDAA #$01                                                  
01                                                                        
3B9 20                                                                    
     STORE: BRA PATCH 9                                                   
                     Go store it                                          
1D                                                                        
3BB BD                                                                    
     FIND: JSR FINDBAR                                                    
                     Go across frame vert. to                             
02                   next guidebar                                        
E0                                                                        
3BE 86                                                                    
     LDAA #$34       Now guide along bar left                             
34                   to home position                                     
300 97                                                                    
     STAA HORDIR                                                          
DA                                                                        
3C2 BD                                                                    
     JSR CENTER                                                           
00                                                                        
53                                                                        
__________________________________________________________________________
3C5 96                                                                    
     LDAA VERT       Update frame counter                                 
A8                                                                        
3C7 2B                                                                    
     BMI INCR        In which direction?                                  
03                                                                        
3C9 4A                                                                    
     DECR: DECA                                                           
Down if positive                                                          
3CA 20                                                                    
     BRA .+1                                                              
01                                                                        
3CC 4C                                                                    
     INCR: INCA                                                           
Up if negative                                                            
3CD 97                                                                    
     STAA VERT       Store it                                             
A8                                                                        
3CF 26                                                                    
     BNE VERT        Done? If not, do another frame                       
DF                                                                        
3D1 39                                                                    
     RTS             Otherwise back to monitor                            
                     for next                                             
3D8 97                                                                    
     PATCH9: STAA OUTVIEW                                                 
                     Store vert, direction flag                           
AC                   for findbar                                          
3DA 86                                                                    
     LDAA #$FF       Now large hor. and vert. pulses                      
FF                   to get away from present                             
                     guidebar and angle bars                              
3DC 97                                                                    
     STAA PULSTIM    Max. pulse width                                     
F5                                                                        
3DE 86                                                                    
     LDAA #$3C       HORDIR=right                                         
3C                                                                        
3EO C6                                                                    
     LDAB #$07       HOR. SPEED=medium                                    
07                                                                        
3E2 BD                                                                    
     JSR PULSE       Do horizontal pulse                                  
01                                                                        
FO                                                                        
3E5 96                                                                    
     LDAA OUTVIEW    Which direction for large                            
AC                   vertical pulse?                                      
3E7 27                                                                    
     BEQ UP                                                               
04                                                                        
3E9 86                                                                    
     DOWN: LDAA #$34 DOWN if outview=1                                    
34                                                                        
3EB 20                                                                    
     BRA .+2                                                              
02                                                                        
3ED 86                                                                    
     UP: LDAA #$3C   Up if outview=1                                      
3C                                                                        
3EF C6                                                                    
     .+2: LDAB #$70  Select med. vert. speed                              
70                                                                        
3F1 BD                                                                    
     JSR PULSE       Do the vertical pulse                                
01                                                                        
F0                                                                        
3F4 20                                                                    
     BRA FIND        Ready to find next guidebar                          
C5                                                                        
                     Routine to ring 2 codes                              
                     into view, read them and                             
                     output to &#34;RESULT&#34;                                   
47C 97                                                                    
     READZ:STAA LOWLIM                                                    
A2                   Store limit from patch 7 for                         
                     verifying codes                                      
47E D7                                                                    
     STAB UPLIM                                                           
A3                                                                        
480 7F                                                                    
     READ2+4: CLR RESULT                                                  
00                   Clear previously read codes                          
D9                                                                        
483 7F                                                                    
     CLR CODECNT     Clear count for number of                            
00                   codes to read                                        
DF                                                                        
486 86                                                                    
     NEXT: LDAA #$FF Prepare to use pulse routine                         
FF                   with search for light feature                        
488 97                                                                    
     STAA PULSTIM    Make search for time big                             
F5                                                                        
48A 86                                                                    
     LDAA #$34       Select direction=left                                
34                                                                        
48C C6                                                                    
     LDAB #$02       Select slow hor. speed                               
02                                                                        
48E 7C                                                                    
     INC SRCHFLG     Enable data search                                   
00                                                                        
AG                                                                        
491 7E                                                                    
     JMP PATCH12     Search for next code                                 
02                                                                        
36                                                                        
494 00               When code is in view,                                
00                   position and read it.                                
                     Back code into &#34;RESULT&#34;                              
496 96                                                                    
     BACK4: LDAA CODECNT                                                  
DF                                                                        
498 4C                                                                    
499 97                                                                    
     STAA CODECNT                                                         
DF                                                                        
49B 81                                                                    
     CMPA. #$02      All codes read?                                      
02                                                                        
49C 26                                                                    
     BNE NEXT        No - Get and re-read answer                          
E8                                                                        
49E 39                                                                    
     RTS             Yes - Back to monitor                                
__________________________________________________________________________
49F C6                                                                    
     SWAP: LDAB #$04 Routine called by decode to                          
04                   swap digits of result, since                         
                     last digit was read first-                           
                     need to rotate 4 bits                                
4A1 96                                                                    
     LOOP: LDAA RESULT                                                    
D9                                                                        
4A3 2B                                                                    
     BME .+3                                                              
03                                                                        
4A5 06                                                                    
     CLC             Determine carry for next                             
                     rotate                                               
4A6 20                                                                    
     BRA .+1                                                              
01                   Swap by rotating 4 bits                              
4A8 OD                                                                    
     .+3: SEC                                                             
4A9 79                                                                    
     .+1: ROL RESULT                                                      
00                                                                        
D9                                                                        
4AC 5A                                                                    
     DEC B           All done?                                            
4AD 26                                                                    
     BNE LOOP        No - rotate again                                    
F2                                                                        
4AF 00               Yes - Back to PATCH 4 to                             
                     verify 2nd code                                      
4BO BD                                                                    
     PATCH4: JSR VERIFY                                                   
                     Verify code just read, output                        
05                   is re-read= 1 for good                               
                     read, φ for bad                                  
4B3 D6                                                                    
     LDAB REREAD     Good read?                                           
A1                                                                        
4B5 27                                                                    
     BEQ GOOD        Yes - Return from decode                             
03                   routine                                              
4B7 00               No - Go ahead anyway-                                
00                   Do not re-read code                                  
00                   manually or automatically                            
4BA 39                                                                    
     GOOD: RTS       Return to READ 2                                     
__________________________________________________________________________
4BB BD                                                                    
     PATCH4B: JSR DECODE                                                  
                     ;When code is in view, position                      
03                   ;and read it, pack code                              
FC                   ;into result                                         
4BE 86                                                                    
     LDAA #$FF       ;Set up another                                      
FF                   ;long pulse enable, to get off                       
                     code                                                 
4CO 97                                                                    
     STAA PULSTIM    ;put the pulse                                       
FS                   ;length away                                         
4C2 86                                                                    
     LDAA #$34       ;We still want                                       
34                   ;it to go left                                       
4C4 C6                                                                    
     LDAB #$02       ;And, we want it                                     
02                   ;to go slow                                          
4C6 7A                                                                    
     DEC SRCHFLG     ;Pulse until we get off code                         
00                   ;(Pulse until dark)                                  
A6                                                                        
4C9 BD                                                                    
     JSR PULSE       ;This is what actually                               
01                   ;Makes it go                                         
FO                                                                        
4CC 7E                                                                    
     JMP BACK4       ;Go back to what was before                          
04                   ;it was not                                          
95                                                                        
236 BD                                                                    
     PATCH12: JSR PULSE                                                   
                     Search for code                                      
01                                                                        
FO                                                                        
239 BD                                                                    
     JSR SRCH        At end of search, has                                
00                   code been found?                                     
1E                                                                        
23C 96                                                                    
     LDAA LITCNT     If so, data is non-zero                              
12                                                                        
23E 26                                                                    
     BME FOUND       Yes - Go on                                          
03                                                                        
240 7E                                                                    
     JMP NEXT        No - Do another search                               
04                   pulse                                                
86                                                                        
243 7E                                                                    
     FOUND:          Go to decode here                                    
04                                                                        
BB                                                                        
Routine executed upon reaching home                                       
on destination frame. Reads all codes                                     
at destination, chooses next frame address                                
from array based on user key input.                                       
Finally, return to home position on the                                   
frame and proceeds to user next frame                                     
for movement based on key input on 64 or 65.                              
523 96                                                                    
     CODES: LDAA PRESFRAME                                                
                     Where are we now?                                    
E2                                                                        
525 81                                                                    
     CMPA #$34       If frame 64 or 65 (row 3,                            
34                   4 or 5), must now read                               
                     string of codes to be                                
                     accessed by user keys.                               
527 27                                                                    
     BEQ BLTCODES                                                         
3A                                                                        
                     If normal frame, must only                           
                     read single code pair to                             
529 81                                                                    
     CMPA #$35       verify location at proper                            
35                   destination                                          
52B 27                                                                    
     BEQ KEYCODES                                                         
36                                                                        
52D 86                                                                    
     NORMAL: LDAA #$3F                                                    
                     First store software interrrupt                      
3F                   code to enable breakpoint                            
                     for next input automatically                         
52F B7                                                                    
     STAA ROUTE                                                           
02                                                                        
71                                                                        
532 86                                                                    
     LDAA #$01       Flag for PATCH 7 that                                
01                   frame is not 64 or 65                                
534 97                                                                    
     STAA NORM                                                            
A4                                                                        
536 BD                                                                    
     JSR PATCH 7     Do conversion and put                                
05                   result in limits to verify                           
10                   codes read.                                          
539 BD                                                                    
     JSR READZ       Now ready and verify                                 
04                                                                        
7C                                                                        
53C B6                                                                    
     SAME: LDAA #$01 Initialize number of code                            
01                   pairs read to 1 for getting                          
                     back home                                            
53E 97                                                                    
     STAA NUMBER                                                          
DC                                                                        
540 BD                                                                    
     JSR BAKHOM      Get back to home position                            
05                   on frame                                             
46                                                                        
543 7E                                                                    
     JMP ROUTE       Ready to go with user                                
02                   input                                                
71                                                                        
__________________________________________________________________________
546 97                                                                    
     BAKHOM: STAA PULSNMR                                                 
D4                                                                        
548 86                                                                    
     LDAA #$80       Use med. pulse width                                 
80                                                                        
54A 97                                                                    
     STAA PULSTIM                                                         
F5                                                                        
54C 86                                                                    
     LDAA #$3C       Pulse direction=right                                
3C                                                                        
54E C6                                                                    
     LDAB #$08       Pulse speed fast                                     
08                                                                        
550 BD                                                                    
     JSR PULSE       Pulse over the codes                                 
01                                                                        
FO                                                                        
553 7A                                                                    
     DEC PULSNMR                                                          
00                                                                        
D4                                                                        
556 26                                                                    
     BNE BAKHOM                                                           
FO                                                                        
558 BD                                                                    
     JSR REGISTER    Done jumping over codes,                             
03                   then find the guidebar                               
70                                                                        
55B BD                                                                    
     JSR CENTER      Back to left of bar for                              
00                   home position                                        
53                                                                        
55E 39                                                                    
     RTS             Ready to go on with user                             
                     input, or automatic route                            
                     to frame commanded by user                           
                     key                                                  
55F 00                                                                    
00                                                                        
00                                                                        
562 00                                                                    
__________________________________________________________________________
563 86                                                                    
     KEYCODES: LDAA #$BD                                                  
                     Store original instruction                           
BD                   into first instruction of next                       
                     cycle, to enable automatic                           
                     routine to frame selected with                       
                     user key                                             
565 B7                                                                    
     STAA ROUTE                                                           
02                                                                        
71                                                                        
568 86                                                                    
     LDAA #$07       Number of code pairs to be                           
07                   read=7                                               
56A 47                                                                    
     STAA NUMBER                                                          
DC                                                                        
56C 97                                                                    
     STAA NUMCNT+1   Init. counter to keep track                          
DE                   of codes                                             
56E 7F                                                                    
     CLR NORM        Indicate special frame 64 or                         
00                   65 for PATCH 7                                       
A4                                                                        
571 8D                                                                    
     PAIR: BSR PATCH 7                                                    
                     Calc. limits for valid code                          
9D                   read                                                 
573 BD                                                                    
     JSR READZ       Read next pair of codes                              
04                                                                        
7C                                                                        
576 DE                                                                    
     LDX NUMCNT      Load pointer to array                                
DD                   for storing the result                               
578 96                                                                    
     LDAA RESULT     Fetch result of code                                 
D9                                                                        
57A A7                                                                    
     STAA KEYTABL-1,X                                                     
                     Now store in table for access                        
E2                   by key input later                                   
57C 7A                                                                    
     DEC NUMCNT+1    Count off the codes just read                        
00                                                                        
DE                                                                        
57F 26                                                                    
     BNE PAIR        Not done yet? Then read                              
FO                   another pair of codes                                
581 86                                                                    
     SELECT: LDAA #$CO                                                    
                     Prepare to light up next                             
CO                   frame LED                                            
58B 20                                                                    
     BRA READKY      Then go wait for user to select                      
1B                   next frame with a key                                
Routine to convert present frame                                          
number into decimal format for                                            
comparison with result of reading                                         
codes, and set upper and lower limits                                     
 to verify code reading                                                   
510 7C                                                                    
     PATCH 7: INC CONVERT                                                 
                     Enable flag for conversion                           
00                   in this direction                                    
A5                                                                        
513 BD                                                                    
     JSR NINES       Do conversion on                                     
02                   NEXFRAME (=PRESFRAME);                               
C5                   Result of conversion is in ACCA                      
516 D6                                                                    
     LDAB NORM       Is frame normal (not 64 or 65)?                      
A4                                                                        
518 27                                                                    
     BEQ SPECIAL     No - store special limits                            
03                   for codes on frames 64, 65                           
51A 16                                                                    
     TAB             Yes - Both limits are=PRESFRAME                      
51B 20                                                                    
     BRA SETLIM      Limits are in ACCA, ACCB                             
04                                                                        
51D C6                                                                    
     SPECIAL:LDAA #$79                                                    
                     Upper limits for frames 64, 65                       
79                   is high digit=7, low digit=9                         
51F 86                                                                    
     LDAA #$60       Lower limit is high digit                            
60                   =6, low digit=0                                      
521 39                                                                    
     SETLIM: RTS     Return then read 2 intermediately                    
                     stored ACCA and ACCB into limits                     
__________________________________________________________________________
SWITCH REG. READ                                                          
PROGRAM - WAITS FOR SWITCH TO BE                                          
PRESSED, LEADS THE REGISTER, WAITS                                        
FOR SWITCH RELEASE AND SELECTS                                            
NEXT FRAME                                                                
585 87                                                                    
      SWITCH: STAA LEDREG                                                 
                     Light up appropriate LED&#39;s                           
06                                                                        
00                                                                        
588 B6                                                                    
     READ1: LDAA SWREG                                                    
                     Read switch register                                 
07                                                                        
00                                                                        
58B 81                                                                    
     CMPA #$80       Will have top bit set                                
80                                                                        
58D 27                                                                    
     BEQ READ1       Wait for switch to be pressed                        
F9                                                                        
58F 80                                                                    
     SUBA #$80       Erase top bit,                                       
80                                                                        
591 97                                                                    
     STAA KEYREG     And save result                                      
D8                                                                        
593 B6                                                                    
     READ2: LDAA SWREG                                                    
                     Wait for switch release                              
07                                                                        
00                                                                        
596 81                                                                    
     CMPA #$80       Topbit will again be set                             
80                                                                        
598 26                                                                    
     BNE READZ       All other bits should be reset                       
F9                                                                        
59A 86                                                                    
     LDAA #$40       Now clear LED&#39;s                                      
40                                                                        
59C 7E                                                                    
     JMP PATCH 11    Go finish the routine                                
01                                                                        
7A                                                                        
__________________________________________________________________________
17A B7                                                                    
     PATCH11: STAA LEDREG                                                 
                     Clear LED&#39;s                                          
06                                                                        
00                                                                        
17D 96                                                                    
     LDAA PREV       In case of previous bad read,                        
AE                   recall previous result before                        
                     re-reading (In case of next                          
                     frame, this doesn&#39;t matter)                          
17F 97                                                                    
     STAA RESULT                                                          
D9                                                                        
181 39                                                                    
     RTS             Back to caller                                       
5A0 BD                                                                    
     READKY: JSR SWITCH                                                   
                     Read user selection key                              
05                                                                        
85                                                                        
5A3 CE                                                                    
     LDX #$0006      Yes - prepare to access table                        
00                   based on switch read                                 
06                                                                        
5A6 86                                                                    
     LDAA #$40       Switch #6 is bit 6 set in                            
40                   SWREG                                                
5A8 91                                                                    
     BACK: CMPA KEYREG                                                    
                     Was this switch pressed?                             
D8                                                                        
5AA 27                                                                    
     BEQ MATCH       Yes - Go access table                                
07                                                                        
5AC 09                                                                    
     DEX             No - Advance table pointer                           
5AD 44                                                                    
     LSRA            Advance to next down the line                        
SAE 26                                                                    
     BNE BACK        Last switch checked? No go                           
F8                   check another                                        
5BO 7E                                                                    
     ERR1: JMP SELECT                                                     
                     Yes - switch data invalid;                           
05                   interrupt for user to try again                      
81                                                                        
5B3 A6                                                                    
     MATCH: LDAA KEYTABL,X                                                
                     Fetch code data from table,                          
E3                   as selected by switch                                
5B5 97                                                                    
     STAA NEXFRAME   Code data is next frame                              
E1                   address                                              
5B7 86                                                                    
     LDAA #$04       Go back to home position before                      
04                   moving to next frame                                 
5B9 BD                                                                    
     JSR BAKHOM                                                           
05                                                                        
46                                                                        
5BC 7E                                                                    
     JMP ROUTE       Ready to do it over again                            
02                                                                        
71                                                                        
__________________________________________________________________________
 
    
     
         ______________________________________                                    
GENERAL PURPOSE                                                           
PATTERN RECOGNITION SUBROUTINE                                            
______________________________________                                    
    Extracts Features According To The                                    
    Following Definitions                                                 
→                                                                  
    Start of feature is two consecutive &#34;light&#34; half-bytes                
    (INPTID) = 1)                                                         
→                                                                  
    INPTID = 0 - &#34;DON&#39;T CARE&#34;- Counts as &#34;light&#34; inside                   
    feature, &#34;dark&#34; if outside                                            
→                                                                  
    End of feature is last &#34;light&#34; half-byte preceeding                   
    first &#34;dark&#34; half-byte                                                
    Calls XAMIN to determine INPTID, scans to end                         
    of feature or end of array, whichever first output                    
    is feature (Start, Length) in half-bytes                              
    If no feature is found, FEATSTRT = 0                                  
100 4F XTRACT:    CLRA           Clear outputs as                         
                                 signal in case                           
                                 no signal is                             
                                 found                                    
101 97            STAA LITCNT                                             
F2                                                                        
103 97            STAA FEATSTRT                                           
F1                                                                        
105 00                                                                    
00                                                                        
00                                                                        
00                                                                        
109 BD FSTIME:    JSR XAMIN      Examine next                             
01                               half-byte                                
46                                                                        
10C 86            LDAA #$1E      All data exam-                           
1E                               ined?                                    
10E 91            CMPA BYTPTR+1                                           
D7                                                                        
110 26            BNE CHKOUT     No - Go look                             
01                               for start of                             
                                 feature                                  
112 39            RTS            Yes - G0 back                            
                                 to caller                                
113 96 CHKOUT:    LDAA INPTID    What did last                            
AA                               half-byte con-                           
                                 tain                                     
115 2E            BGT FIRST 1    ≧75% light-                       
0B                               possible feature                         
117 7F            CLR LITCNT     &lt;75% light-                              
00                               cancel feature                           
F2                                                                        
11A 20            BRA FSTIME     +keep looking                            
ED                                                                        
11C 00                                                                    
00                                                                        
00                                                                        
00                                                                        
00                                                                        
00                                                                        
122 7C FIRST1:    INC LITCNT     First light data                         
00                               found- add to                            
F2                               length of                                
                                 feature                                  
125 B6            LDAA #$02      Two consecu-                             
02                               tive light half-                         
                                 bytes found yet?                         
127 91            CMPA LITCNT                                             
F2                                                                        
129 26            BNE FSTIME     No - look for                            
DE                               second                                   
12B 96            LDAA BYTPTR+1  Yes - Calculate                          
D7                               start of feature                         
12D 48            ASLA           By multiplying                           
                                 bytes                                    
12F 9B            ADDA HLFPTR    Add half-byte                            
AB                               count (0 or 1)                           
130 80            SUBA #$02      +Subtract                                
02                               half-bytes, Byte                         
                                 count always                             
                                 looks ahead one                          
                                 byte                                     
132 97            STAA FEATSTRT  Store start of                           
F1                               feature                                  
134 BD 2NDTIME:   JSR XAMIN      Look at next                             
01                               half-byte                                
46                                                                        
137 96            LDAA INPTID    Result?                                  
AA                                                                        
139 2A            BPL SECND1     ≧50% light                        
01                               (0 to 1)                                 
                                 INPTID add                               
                                 to feature                               
13B 39            RTS            &lt;50% light -                             
                                 end of feature                           
13C 7C SECND1:    INC LITCNT     Add to feature                           
00                                                                        
F2                                                                        
13F 86 CHECKIN:   LDAA #$20      End of data?                             
20                                                                        
141 91            CMPA BYTPTR+1                                           
D7                                                                        
143 26            BNE 2NDTIME    No - Look at                             
EF                               next half-byte                           
145 3A            RTS            Yes - end of                             
                                 feature                                  
______________________________________                                    
 
    
     
         ______________________________________                                    
EXAMINE SUBROUTINE                                                        
______________________________________                                    
HLFTR = 0 or 1 HALF-BYTE FROM BYTABL, OUTPUT IS                           
(INPTID = 1 &gt; 1/2 bits set, -1 for &lt;1/2 bits set, 0 for                   
1/2 bits set)                                                             
146 DE XAMINE:   LDX BYTPTR                                               
D6                                                                        
148 A6           LDAA BYTABL+1,X Fetch data                               
B2                               pointed to by                            
                                 BYTPTR                                   
14A D6           LDAB HLFPTR     Which half-byte                          
AB                               is desired?                              
14C 26           BNE RHLF        If right (low or-                        
09                               der) ignore next                         
                                 step                                     
14E 7C           INC HLFPTR      If left (high                            
00                               order) point to                          
AB                               right for next                           
                                 time,                                    
151 44           LSRA            Shift left data                          
                                 into right half-                         
                                 byte with zeros                          
                                 in left half-byte                        
152 44           LSRA                                                     
153 44           LSRA                                                     
154 44           LSRA                                                     
155 20           BRA IDENT       +Go on                                   
08                                                                        
157 84 RHLF:     ANDA #$0F       Mask out left                            
OF                               byte                                     
159 7A           DEC HLFPTR      Point to left                            
00                               half-byte for                            
AB                               next step                                
15C 7C           INC BYTPTR+1    Point to next                            
00                               byte for next                            
D7                               step                                     
15r B7 IDENT:    STAA HERE       Data is used as                          
01                               index for table                          
66                                                                        
162 CE           LDX #IDTABL     X contains table                         
01                               base address                             
6A                                                                        
165 E6           LDAB O,X                                                 
00     HERE:                                                              
167 D7           STAB INPTID     Store result of                          
AA                               table look-up                            
169 39           RTS             All done                                 
______________________________________                                    
01 16A  FF     IDENT: identifies                                          
                             0   01 172 FF   8                            
               input data as light                                        
               (01), dark (FF) or                                         
01      FF     either (00)   1   00     00   9                            
01 16C  FF                   2   00 174 00   A                            
00      00                   3   FF     01   B                            
01 16E  FF                   4   00 176 00   C                            
00      00                   5   FF     01   D                            
00 170  00                   6   FF 178 01   E                            
FF      01                   7   FF     01   F                            
______________________________________                                    
 
    
     
         __________________________________________________________________________
INTERFACE PROGRAM                                                         
INIT-SETS UP INPUT/OUTPUT PIA&#39;S                                           
SRCH-GENERAL PURPOSE SUBROUTINE TO                                        
FIND FIRST FEATURE                                                        
STRINT-START INTERRUPT                                                    
__________________________________________________________________________
00 OF                                                                     
    INIT: SE1          Do not interrupt until this                        
                       routine is completed                               
01 86     LDA #$30     Select DDR for 8004                                
30  103 B7             STA PIACRA                                         
80                                                                        
05                                                                        
06 B7     STAA PIACRB  ←And 8006, with falling edge                  
80                     sensor interrupt trig.                             
07                                                                        
09 7f     CLR PIACRA   Select all lines of 8004 as                        
80                     inputs                                             
04                                                                        
0C 86     LDAA #$FF                                                       
FF                                                                        
OE B7     STAA PIAORB  Select all lines of 8006 as                        
80                     outputs                                            
06                                                                        
11 96     LDAA HORDIR  Select proper horizontal                           
DA                     direction                                          
13 87     TAA PIACRA   +Store in 8005                                     
80                                                                        
05                                                                        
16 86     LDAA #$40    Blank LED&#39;s                                        
40                                                                        
18 B7     STAA LEDREG                                                     
06                                                                        
00                                                                        
1B OE     CLI          Now ready for interrupts                           
1C 39     RTS          Back to monitor                                    
1E 7C                                                                     
    SRCH: INC PIACRB   Enable sensor interrupt                            
80                                                                        
07                                                                        
21 3E     WAI          Wait for new data                                  
22 7F     CLR BYTPTR   Initialize pointers to left edge                   
00                     of view                                            
D7                                                                        
25 7F     CLR HLFPTR                                                      
00                                                                        
AB                                                                        
28 BD     JSR XTRACT   +Extract leftmost feature                          
01                                                                        
00                                                                        
2B 39     RTS          Back to caller                                     
30 7A                                                                     
    INTRUP:                                                               
          DEC PIACRB   Disable further start interrupts                   
80                                                                        
07                                                                        
33 CE     LDX #$00     Reset input data counter                           
00                                                                        
00                                                                        
36 7C     INC PIACRA   Enable sensor data interrupt                       
80                                                                        
05                                                                        
39 86                                                                     
    WAT:  LDAA #$80    Mask out all but interrupt bit                     
80                                                                        
3B B4     ANDA PIACRA                                                     
80                                                                        
05 3F 27  BEQ WAIT     Wait for interrupt to occur                        
F9                                                                        
40 B6     LDAA PIAORA  Then fetch input data                              
80                                                                        
04                                                                        
43 A7     STAA BYTABL,X                                                   
                       +Store in proper byte of table                     
B1                                                                        
45 08     INX          Update data counter                                
46 8C     CPX #$20     All done?                                          
00                                                                        
20                                                                        
49 26     BNE WAIT     No-back for next byte                              
EE                                                                        
4B 7A                                                                     
    DONE: DEC PIACRA   Yes-disable sensor interrupt                       
80                     until next interrupt routine                       
05                                                                        
4E 96     LDAA BYTABL  Shift leftmost data to right                       
B1                     end since first data byte was                      
                       missed                                             
50 97     STAA BYTABL+21                                                  
D1                                                                        
52 3B     RTI          +Return                                            
__________________________________________________________________________
 
    
     
         __________________________________________________________________________
CENTER                                                                    
53 BD                                                                     
     CENTER: JSR SRCH                                                     
                    Get start and length of                               
00                  guidebar                                              
1E                                                                        
56 D6                                                                     
     LDAB LITCNT    Length=0?                                             
F2                                                                        
58 26                                                                     
     BNE GUIDE      No - Guidebar was found                               
04                                                                        
5A 7E                                                                     
     JMP PATCH 2    Yes - Check to make sure                              
01                  blank data was really seen                            
A0                                                                        
5D 00                                                                     
5E 7F                                                                     
     GUIDE: CLR BLANKCNT                                                  
                    Guidebar found - reset                                
00                  blank data flag                                       
AD                                                                        
61 96                                                                     
     LDAA FEATSTRT  Start of bar at left edge of view                     
F1                                                                        
63 27                                                                     
     BEQ LEFT       Yes - Go center the bar                               
25                                                                        
65 9B                                                                     
     ADDA LITCNT    No - End of bar at right edge                         
F2                  of view?                                              
67 81                                                                     
     CMPA #$40                                                            
40                                                                        
69 27                                                                     
     BEQ RIGHT      Yes - Go center the bar                               
19                                                                        
6B Cl                                                                     
     CMPB #$04      No - Does bar have minimum                            
04                  valid width?                                          
6D 2C                                                                     
     BGE SIDE 1     Yes - Go see if it needs center-                      
2A                  ing                                                   
6F 86                                                                     
     LDAA #$3C      No - Enable PIA to stop motor                         
3C                                                                        
71 00                                                                     
72 20                                                                     
     BRA HOR ONLY                                                         
Go do it                                                                  
0C                                                                        
74 D6                                                                     
     SIDE: LDAB FEATSTRT                                                  
                    Check if guidebar needs                               
F1                  centering                                             
76 C1                                                                     
     CMPB #$08      ←Left edge extreme, bar                          
 ##STR1##           must start either left or  allowed area               
78 2D                                                                     
     BLT LEFT                                                             
10                                                                        
7A Cl                                                                     
     CMPB #$38      ←Right edge extreme                              
 ##STR2##                                                                 
7C 2E                                                                     
     BGT RIGHT      Or right of allowed area                              
06                                                                        
7E 86                                                                     
     LDAA #$34      No centering required                                 
34                                                                        
80 C6                                                                     
     HORONLY:LDAB #$06                                                    
                    Load horizontal speed only                            
 ##STR3##                                                                 
82 20                                                                     
     BRA STOMOTR    +Store in PIA                                         
0A                                                                        
84 86                                                                     
     RIGHT: LDAA #$34                                                     
                    If bar too far right (down)                           
34                  make vertical direction up;                           
86 C6                                                                     
     LDAB #$23      Store-vert. speed=2, Hor.                             
 ##STR4##           speed=3                                               
88 20                                                                     
     BRA STOMOTR    +Store in PIA                                         
04                                                                        
8A 86                                                                     
     LEFT: LDAA #$3C                                                      
                    If bar too far left (up)                              
3C                  make vertical direction down                          
8C C6                                                                     
     LDAB #$23      Vert. speed=2, Hor. speed=3                           
 ##STR5##                                                                 
8E B7                                                                     
     STOMOTR: STAA PIACRB                                                 
                    Store vertical direction                              
80                                                                        
07                                                                        
92 F7                                                                     
     STAB PIAORB    +Both motor speeds                                    
80                                                                        
06                                                                        
94 00                                                                     
00                                                                        
96 7E                                                                     
     JMP CENTER     Back to start                                         
00                                                                        
53                                                                        
99 96                                                                     
     SIDE1: LDAA HORDIR                                                   
                    Makes sure proper horizontal                          
DA                  direction is chosen for this                          
                    cycle                                                 
9B B7                                                                     
     STAA PIACRA                                                          
80                                                                        
05                                                                        
9E 20                                                                     
     BRA SIDE                                                             
D4                                                                        
AO 39                                                                     
     END: RTS                                                             
1AO 86                                                                    
     PATCH2:LDAA #$03                                                     
                    Valid blank at edge of guidebar                       
03                                                                        
1A2 B7                                                                    
     STAA PIAORB    Slow down motor in case                               
80                  this is valid blank                                   
06                                                                        
1A5 96                                                                    
     LDAA BLANKCNT  Register blank data                                   
AD                                                                        
1A7 4C                                                                    
     INCA                                                                 
1A8 81                                                                    
     CMPA #$04      Blank data seen min. number                           
04                  times in a row?                                       
1AA 27                                                                    
     BEQ .+5        Yes - Stop motor and exit                             
05                  from center                                           
1AC 97                                                                    
     STAA BLANKCNT  No - keep timing the blank                            
AD                                                                        
1AE 7E                                                                    
     JMP CENTER     Back another time                                     
00                                                                        
53                                                                        
1B1 86                                                                    
     .+5: LDAA #$34 Store vertical direction                              
34                                                                        
1B3 5F                                                                    
     CLRB           +Clear both motors                                    
1B4 B7                                                                    
     STAB PIAORB                                                          
80                                                                        
07                                                                        
1BA 7F                                                                    
     CLR BLANKCNT   Reset flag automatically                              
00                                                                        
AD                                                                        
1BD 39                                                                    
     RTS            True end of guidebar here                             
__________________________________________________________________________
 
    
     
         ______________________________________                                    
PULSE                                                                     
______________________________________                                    
1FO C1 PULSE:    CMPB #$10     B contains motor                           
10                             speed, is pulse vert.?                     
If so B ≧ 10                                                       
1F2 2D           BLT HORDIR    No-Store direction                         
05                             in hor. PIA                                
1F4 B7           STAA PIACRB                                              
80                                                                        
1F7 20           BRA .+8                                                  
08                                                                        
1F9 B7 HORDIR:   STAA PIACRA                                              
80                                                                        
05                                                                        
1FC 86           LDAA #$34     If horizontal; motor                       
34                             may not yet be                             
                               enabled for output,                        
                               Go do it                                   
1FE B7           STAA PIACRB                                              
80                                                                        
01                                                                        
201 F7 +.8:      STAB PIAORB   Start upmotor                              
80                                                                        
06                                                                        
204 D6           LDAB PULSTIM  Fetch pulse width                          
F5                                                                        
206 5A MORE:     DECB                                                     
207 27           BEQ STOP      Pulse timed out?                           
0A                                                                        
209 96           LDAA SRCHFLG  No-Data search                             
A6                             desired during                             
                               pulse?                                     
20B 26 BNE JUMP  Yes-Go look                                              
OD                                                                        
20D 4F           CLRA          Execute inner wall                         
20E 4A LOOP      DECA          Loop                                       
20F 26           BNE LOOP                                                 
FD                                                                        
211 20           BRA MORE      +Go test for end of                        
F3                             pulse                                      
213 7F STOP:     CLR PIAORB    Yes-Stop motor                             
80                                                                        
06                                                                        
216 7F           CLR SRCHFLG   Reset input enable                         
00                             Flag                                       
A6                                                                        
219 39           RTS           Back to caller                             
21A 7E JUMP      JMP PATCH 1                                              
01                                                                        
83                                                                        
183 D7 PATCH1:   STAB SAVI     ; Save B to keep                           
D2                             count pulse width                          
185 BD AGAIN:    JSR SRCH      ; Go look                                  
00                                                                        
1E                                                                        
188 F6           LDAB SAVI     ;Bring it back                             
00                                                                        
D2                                                                        
18B 96           LDAA LITCNT   ;Get the data                              
F2                                                                        
26               BNE LIGHT     ;Go see what to do                         
06                             about it                                   
18F 96 DARK:     LDAA SRCHFLG  ;If no data, stop if                       
                               &lt;0                                         
A6                             ;Keep going if &gt;0                          
191 2B           BMI STOP1     ;Here for stop                             
06                                                                        
193 20           BRA MORE1     ;Else Here for more                        
07                             pulse                                      
195 96 LIGHT:    LDAA SRCHFLG  ;If data there, stop if                    
A6                             ;Search flag &gt;O,                           
                               and keep going if                          
                               SRCHFLAG &gt;0                                
197 2B           BMI MORE 1    ;Here for more                             
03                             pulse                                      
199 7E STOP1:    JMP STOP      ;Here for stop                             
02                                                                        
13                                                                        
19C 7E MORE1:    JMP MORE      ;Here for more                             
02                             pulse                                      
06                                                                        
______________________________________                                    
 
    
     
                                           DECODE                                  
__________________________________________________________________________
Positions, reads &amp; packs a code when brought into view                    
by monitor                                                                
3F7 86                                                                    
     DECODE-5: LDAA #$00                                                  
                     Turn on reread LED                                   
00                                                                        
3F9 BD                                                                    
     JSR SWITCH      Only executed if code out of                         
05                   focus - user presses red switch                      
B5                   after focussing, then code re-                       
                     read                                                 
3FC 86                                                                    
     DECODE: LDAA #$3C                                                    
                     Slow movement in up direction                        
3C                   to position + read index bar                         
3FEC6                                                                     
     LDAB #$20       Select slow vert. speed                              
20                                                                        
400 B7                                                                    
     STAA PIACRB     Store direction                                      
80                                                                        
07                                                                        
403 F7                                                                    
     STAB PIAORB     Store speed to start motor                           
80                                                                        
06                                                                        
406 BD                                                                    
     INDEX: JSR SRCH Read leftmost feature                                
00                   (Index BAR)                                          
1E                                                                        
409 96                                                                    
     LDAA FEATSTRT   Look where it starts                                 
F1                                                                        
40B 81                                                                    
     CMPA #$20       Far enough to right?                                 
20                                                                        
40D 2D                                                                    
     BLT INDEX                                                            
F7                                                                        
40F 00                                                                    
00                                                                        
00                                                                        
00                                                                        
413 86                                                                    
     ENOUGH: LDAA #$34                                                    
                     Now reverse direction to bring                       
34                   all data into view                                   
415 87                                                                    
     STAA PIACRB     (Index bar at far left) with                         
80                   same slow speed                                      
07                                                                        
418 BD                                                                    
     FIX: JSR SRCH   Fixes index bar at top of view                       
00                                                                        
1E                                                                        
41B 96                                                                    
     LDAA FESTSTRT   Look where index bar starts                          
F1                                                                        
41D 81                                                                    
     CMPA #$10       Close enough to top                                  
10                                                                        
41F 2E                                                                    
     BGT FIX         No - keep moving down                                
F7                                                                        
421 7E                                                                    
     JMP CALC        Yes - Stop motor &amp; calculate                         
04                   size of final positioning pulse                      
FB                                                                        
424 8B                                                                    
     FINAL: ADDA #$0A                                                     
                     Add in exp. deter. pulse width,                      
OA                   set up to remove index bar and                       
                     erase all data in view                               
426 97                                                                    
     STAB PULSINT                                                         
F5                                                                        
428 86                                                                    
     LDAA #$34       direction= down                                      
34                                                                        
42A C6                                                                    
     LDAB #$30       Speed= Slow vertical                                 
30                                                                        
42C BD                                                                    
     JSR PULSE                                                            
Do it; then ready to                                                      
01                   stabilize view for reading the                       
FO                   data bars                                            
42F 86                                                                    
     LDAA #$FO                                                            
FO                   Long pulse width= delay time                         
431 97                                                                    
     STAA PULSTIM                                                         
F5                                                                        
433 86                                                                    
     LDAA #$34       Do not change motor direction                        
34                                                                        
435 5F                                                                    
     CLRB            No motion during delay                               
436 BD                                                                    
     JSR PULSE       Perform the delay-then read                          
01                   to read data                                         
FO                                                                        
439 96 D9                                                                 
     INTERPRET: LDAA RESULT                                               
                      ##STR6##                                            
43B 97                                                                    
     STAA PREV       ;Save previous results in case                       
AF                   this read is bad                                     
43D BD                                                                    
     JSR SCAN        ;First get the data                                  
02                                                                        
46                                                                        
440 96                                                                    
     LDAA CODEPTRM   Determine how many features                          
F4                   were found, from size of array                       
442 81                                                                    
     CMPA #$06       ;Less than three features                            
06                   (6 Bytes?)                                           
444 2D                                                                    
     BLT DECODE-5    ;Yes - Wait for user switch                          
B3                   as signal that focussing has                         
                     been adjusted, then re-read                          
                     code                                                 
446 81                                                                    
     CMPA #$OA       ;&gt; 5 features (10 bytes)?                            
OA                                                                        
448 2C                                                                    
     BGE DECODE-5    ;Yes - Wait as above, then                           
A9                   re-read code                                         
44A 96                                                                    
     LDAA CODETABL   ;No - Where does first                               
F6                   feature start?                                       
44C 97                                                                    
     STAA QUAD       ;Initialize quad, marker to                          
EA                   start of first feature-                              
00                   delimits quadrant in which                           
00                   first data bar is expected                           
450 7F                                                                    
     CLR BARCNT      Points to data bar presently                         
00                   being interpreted                                    
D3                                                                        
45B CE                                                                    
     LDX #$0000                                                           
00                                                                        
00                                                                        
456 DF                                                                    
     STX TEMP+2      Points to feature presently                          
EE                   under investigation                                  
458 00               ;Look for feature start                              
00                   within specified tolerance                           
00                   of quadrant marker                                   
45B DE                                                                    
     NEXFEAT: LDX TEMP+2                                                  
                     ;Fetch feature pointer                               
EE                                                                        
45D A6                                                                    
     LDAA CODETABL,X ;Use it to fetch feature start                       
F6                                                                        
45F 90                                                                    
     SUBA QUAD       ;Find distance from                                  
EA                   feature to quad. marker=                             
                     Abs. value of (FEATSTRT-                             
                     QUAD)                                                
461 ZA                                                                    
     BPL .+1                                                              
01                                                                        
463 40                                                                    
     NEGA            ;Change sign only if neg.                            
464 81                                                                    
     .+1: CMPA #$06  ;Is feature in quadrant,                             
06                   within tolerance?                                    
466 2F                                                                    
     BLE READ        ;Yes - Assign it to the data                         
68                   bar and read it                                      
468 08                                                                    
     INX             ;No - Advance pointer to next                        
                     feature                                              
469 08                                                                    
     INX                                                                  
46A DF                                                                    
     STX TEMP+2                                                           
EE                                                                        
46C 96                                                                    
     LDAA TEMP+3     ;Check for end of feature                            
EF                   array                                                
46E 91                                                                    
     CMPA CODEPTR+1                                                       
F4                                                                        
470 2D                                                                    
     BNT NEXFEAT     ;Not at end of array, keep                           
E9                   looking                                              
472 00               ;If pointing past end of array,                      
00                   no feature was found for the                         
00                   data bar - Assign thin feature                       
00                   (CODE=1) to the bar by setting                       
00                   carry bit                                            
00                                                                        
478 OD                                                                    
     SEC                                                                  
479 7E                                                                    
     JMP ASSIGN                                                           
04                                                                        
DA                                                                        
                     ;Reads selected feature and                          
                     assigns it to a data bar                             
                     (0 or 1) then packs data bar                         
                     into result and sets up for                          
                     next data bar, if any.                               
4DO 86                                                                    
     READ: LDAA #$05 ;Fetch min. size for &#34;FAT&#34;                           
05                   (0) (BAR)                                            
4D2 A1                                                                    
     CMPA CODETABL+1,X                                                    
                     ;Compare with feature                                
F7                   size                                                 
4D4 2F                                                                    
     BLE ZERO        ;Data bar larger, must be 0                          
03                                                                        
4D6 OD                                                                    
     SEC             ;Data bar smaller, must be 1                         
4D7 ZO                                                                    
     BRA ASSIGN                                                           
01                                                                        
4D9 OC                                                                    
     ZERO: CLC                                                            
4DA 79                                                                    
     ASSIGN: ROL RESULT                                                   
                     ;Carry contains data bar value-                      
00                   Shift left into Z-digit result                       
D9                                                                        
4DD96                                                                     
     LDAA BARCNT     ;Check for last data bar                             
D3                                                                        
4DF 81                                                                    
     CMPA #$03                                                            
03                                                                        
4E1 26                                                                    
     BNE SETUP       ;Not yet - set up for next bar                       
07                                                                        
4E3 96                                                                    
     LDAA CODECNT    ;Last bar - is this first code?                      
DF                                                                        
4E5 27                                                                    
     BEQ PATCH 4     Yes - Verify the code                                
C9                                                                        
4E7 20                                                                    
     BRA SWAP        No - wait until digits are                           
B6                   swapped to verify                                    
00                                                                        
4EACE                                                                     
     SETUP: LDX #$0000                                                    
                     ;Get feature pointer back to                         
00                   start of array                                       
00                                                                        
4ED DF                                                                    
     STX TEMP+2                                                           
EE                                                                        
4EF 7C                                                                    
     INC BARCNT      ;Advance bar count                                   
00                                                                        
D3                                                                        
4F2 96                                                                    
     LDAA QUAD       ;Advance quad, marker                                
EA                                                                        
4F4 8B                                                                    
     ADDA #$OE                                                            
OE                                                                        
4F6 97                                                                    
     STAA QUAD       ;Store it                                            
EA                                                                        
4F8 7E                                                                    
     JMP NEXFEAT     ;Start looking for new data bar                      
04                                                                        
5B                                                                        
__________________________________________________________________________
                     ;Check to see if in                                  
                     ;Position for final pulse                            
                     ;to remove index bar                                 
4FB 81                                                                    
     CALC: CMPA #$10 ;is index bar still to left                          
10                   of 1/4 mark?                                         
4FD 2F                                                                    
     BLE NOTRDY      ;Yes - not read for final                            
06                   ;pulse - keep moving down                            
4FF 7F                                                                    
     CLR PIAORB      ;No - Stop motor                                     
80                                                                        
06                                                                        
502 7E                                                                    
     JMP FINAL       ;Calculate size of final                             
04                   ;pulse from index bar position                       
24                   ;in ACCA                                             
505 7E                                                                    
     NOTRDY:JUMP DECODE                                                   
                     ;If sent here go back                                
03                   ; and start positioning                              
FC                   ;over again                                          
508 00                                                                    
00                                                                        
00                                                                        
00                                                                        
00                                                                        
00                                                                        
00                                                                        
50F 00                                                                    
                     Subroutine to verify code                            
                     just read Low lim., up lim.                          
                     give accepted range for                              
                     code verification.                                   
5EB 96                                                                    
     VERIFY:LDAA LOWLIM                                                   
                     Fetch limits - lower                                 
A2                                                                        
5ED D6                                                                    
     LDAB UPLIM                                                           
upper                                                                     
A3                                                                        
5EF 7D                                                                    
     TST CODECNT     1st or 2nd code?                                     
00                                                                        
EF                                                                        
5F2 26                                                                    
     BNE NOMASK      If second (1 code already                            
CD                   counted) compare code with                           
                     full limits                                          
5F4 84                                                                    
     ANDA #$0F       If first (no codes counted)                          
OF                   compare code read with                               
                     lower digit of limits only                           
5F6 C4                                                                    
     ANDB #$OF                                                            
OF                                                                        
5F8 20                                                                    
     BRA NOMASK      Go compare                                           
C7                                                                        
5C1 91                                                                    
     NOMASK: CMPA RESULT                                                  
                     Is code read result less than                        
D9                   lower limit?                                         
5C3 2E                                                                    
     BGT SET         ;Yes - Set re-read flag                              
07                                                                        
5C5 D1                                                                    
     CMPB RESULT     No - greater than upper limit?                       
D9                                                                        
5C7 2D                                                                    
     BLT SET         Yes - set re-read flag                               
03                                                                        
5C9 4F                                                                    
     CLEAR: CLRA     No - clear re-read flag                              
5CA 20                                                                    
     BRA .+2         Go do it                                             
02                                                                        
5CC 86                                                                    
     SET: LDAA #$01  Set re-read flag here                                
01                                                                        
5CE 97                                                                    
     .+2: STAA READ  Go do it                                             
A1                                                                        
5DO 39                                                                    
     RTS             Return to caller                                     
__________________________________________________________________________
 
    
     IV. COMBINED DIGITIZED AND VIEWER MICRIFICHE INFORMATION RETRIEVAL 
     A. Parts Management and Inventory Control Example 
     In the foregoing discussions, the system has been covered with respect to proper alignment of a microfiche, both with respect to the viewer and with respect to the scanner. A specific example will now be provided with respect to a combined system, suitable for PMIC applications, with reference to FIGS. 1, 1A, 2, 3 and 14. 
     In utilizing the apparatus of FIG. 14 in PMIC application, a single microprocessor may be employed. In addition to the apparatus already discussed, peripheral apparatus is provided for the scanner, which apparatus comprises a scanner control 202 and the sensor apparatus disclosed in FIG. 7, namely the sensor position drive 90, the sensor alignment drive 92, the scanner sensor 98, and the sensor register 102, as well as the auxiliary apparatus used in displaying, recording and transmitting the output data. This latter apparatus comprises the LED display 22, the line printer 14, the digital tape recorder 15, and the MODEM unit 16. 
     Before turning to a specific example, as can be seen in FIG. 1, a dealership information terminal is generally illustrated at 10 as comprising a microfiche file 11 which includes master, parts and price microfiche, a viewer 12, a scanner 13, a printer 14, a tape recorder 15, a MODEM unit 16, and his local telephone instrument 17. The telephone instrument 17 may be used to connect the terminal by way of the telephone network 18 to a central computer 19 located in a plant which supplies parts to the dealership. 
     The printer may advantageously be a line printer, such as the 40 character line printer of Anadex model DP-1000. A suitable tape recorder is the digital recorder, known as the SC-1000 Dumb Recorder, manufactured by Seaton Corp. The MODEM unit may be a Data COM 302. 
     The viewer 12 is illustrated as comprising a viewing screen 20 which is positioned with respect to an optical system (not shown) which includes a microfiche transport which receives the viewer-type microfiche through a slot 21. A digital display 22, for example a LED display, is positioned immediately below the viewing screen 20. 
     The viewer 12 also comprises a keyboard which includes a four-function calculator unit 23 and a plurality of operational switches 24-33, the purpose of which will become evident from the description below. 
     FIG. 2 illustrates a portion of a frame 34 of a viewer microfiche, corresponding to a frame 112 of FIG. 8, which microfiche is a master microfiche, while FIG. 3 illustrates a frame 35, also corresponding to a frame 112 of FIG. 8, of a viewer microfiche which is constructed as a parts fiche. The frame 35 is illustrated as comprising one portion 36 which bears graphic information, here in the form of an exploded view of a pump, and another portion 37 which bears alphanumeric information concerning the parts illustrated in the frame portion 36. 
     Assuming now that a customer goes to the parts department of a dealership, for example a farm equipment dealership, needing a part for a tractor. The customer has the model number and can describe where the part is located on the tractor. 
     Armed with this information, the parts man matches the machine and model information provided by the customer to the machine and model information on the header of the parts microfiche in the microfiche file 11, extracts the corresponding microfiche from the microfiche file and reads from the header that the parts on this microfiche are also found on the price microfiche #1. He then extracts the corresponding price microfiche and inserts the parts microfiche in the slot 21 of the viewer and the price microfiche in the slot 13&#39; of the scanner 13. The price microfiche, of course, takes the form discussed above with respect to FIGS. 4 and 5, and has a header which identifies the models served by that parts microfiche. There are, of course, fewer price microfiche than parts microfiche, since a single price microfiche carries prices for several models. The data itself is in the form of digitized codes readable to the scanner, rather than to the human eye. 
     The parts man then turns the viewer on with the ON-OFF switch 44 to energize all of the system hardware and the microfiche are automatically registered in place. 
     The parts man then presses the HOME button 33 which inputs an address for a home position into the entry register 180 (FIG. 14) to automatically index the microfiche to the first frame. The first frame is an index frame which bears alphanumeric information for the parts on that particular microfiche, such as &#34;Dual Pump--Frame 12.&#34; The parts man then enters the 12 with the numerical keys 23 and presses the ADVANCE key 30. The 12 is the address and the key 30 provides the activation. The system operates for alignment as discussed above so that frame 12 becomes properly registered and the content thereof appears on the screen 20. In this example, this is the frame illustrated in FIG. 3. The parts man then checks the part and its location with the customer to determine if the proper part has, indeed, been selected. In this example, the part 11 indicated at 38 is the desired part and is described with the key number 11 at 39 in the portion 37 of the frame as being the manufacturer&#39;s part number W  11852, as seen at 40, and is described at 41 to be a SHAFT-drive (1). The correct part corresponds to the locator number &#34;(1) 01-237&#34;. The portion (1) of the locator number indicated at 42 corresponds to the price microfiche. The locator number has a two-fold function. First of all, within the dealership the locator number can identify a physical location of the part, e.g. the corresponding part bin. Secondly, the locator number portion 43 is the address for the price microfiche. 
     The parts man then enters the locator number portion 43 with the keyboard keys 23 and presses the PRICE key 31. In response to these actions, the scanner transport moves to the addressed column and reads that portion of the column called for by the address. An an example, and referring to FIG. 14, the entry from the address register 180 into the comparator register 182 may set up a basis of comparison which instructs the microprocessor and associated circuits to cause the scanner sensor to read only those bits occuring after the sensor scans a predetermined number of bits. The scanner control 202 feeds the scanned information into the comparator register 182 via the auxiliary code register 200. The comparator register 182, over a similar path back to the scanner control 202, which comprises logic circuits, monitors the data being presented from the scanner sensor 98 to the sensor register 102 so that the information finally lodged in the auxiliary code register is that portion of the scanned line defined by the address of the locator number. Actuation of this process by depression of the key 31 causes the desired information to be output to the display unit 22. As can be seen in FIG. 1A, the manufacturer&#39;s part number W 11852 is displayed as a check, as is the price fiche locator number (1) 01-237. In addition, the asterisk appearing on the display tells the parts man that the dealer has that part in stock. The information to the far right-hand side indicates that the desired part has a price of $7.25. Again, the locator number in the central portion of the display forms the parts man of the physical location of the part. 
     The desired part is retrieved and the parts man copies the information from the display line onto the customer&#39;s sales invoice. 
     Then, for the dealership records, the parts man presses the SALE key 24, and possibly also the ORDER key 26 before depressing the PRINT key 29. The key 29 activates the line printer 14 which immediately copies the part information, error-free, from the entire display line onto a printer tape. The entry is thereby logged as a part of the day&#39;s transactions. 
     In cases where the part is common to several subassemblies, a # appears as a part of the display to indicate that the locator number is a composite number. Inasmuch as the information on that part would appear on many parts microfiche and have numerous locator numbers, a single number is selected as the locator and appears on the master microfiche, the price microfiche and on the stop bins. 
     In situations where a telephone inquiry is made and the customer can provide the manufacturer&#39;s part number directly, the parts man can immediately access the correct master microfiche of the few necessary master microfiche which carry all of the manufacturer&#39;s parts in alphanumeric order. 
     Upon selecting the correct master microfiche, he places the same in the viewer slot 21 and presses the HOME key 33. As with the parts microfiche, the master microfiche is addressed and moved to the home frame, generally the first frame. 
     The home frame comprises an index or the first page of an index which states that the part numbers in the area under investigation are located at frame 47. He then enters 47 with the keys 23 and presses the ADVANCE key which, as before, causes the desired frame to appear on the viewer screen 20. He there finds the manufacturer&#39;s part number provided by the customer, which, in this example, again is part W 11852, as seen in FIG. 2. As also illustrated in FIG. 2 this part number corresponds to the locator number (1) 01-237. The parts man can now select the price microfiche (1) and proceed as in the foregoing example. 
     Cancellations are also readily handled with this PMIC system. If a customer calls later to cancel an order, the parts man can simply bring up the same display on the LED unit 22, depress the CANCEL key 27 and then depress the PRINT key 29. The cancellation activates both the printer 14 and the magnetic tape recorder 15. 
     A number of conveniences for the parts man have been built into the system. The memory key MM can be used to enter all part locator numbers calling for the same price microfiche and recalled by pressing the MR key and then the PRICE key to display the line of information. The clear entry CE key permits the parts man to recover from a faulty entry, as is common practice with calculator devices, and the RETRACE key 32 permits the parts man to retrace frames step-by-step previously called for up to, for example, 32 frames in that the internal built-memory is a last in-first out (LIFO) memory. 
     The parts man will find the printed tape an essential part of his operation in that it carries all transactions identified by the symbols SALE, CHARGE, ORDER, CANCELLATION that was a SALE or a CHARGE or an ORDER, or a CANCELLATION. The printed tape also carries information entered directly from the keyboard, for example the printing of the customer&#39;s invoice number with each transaction. 
     The system also allows the parts man to order a particular quantity, by calling up the price line, by keying in the desired quantity, depressing the Q key 28 depressing the ORDER key 26 and then the key 29. 
     Should the dealer desire to have a listing of all the transactions of the day arranged by type, all transactions can be placed on the magnetic tape during the day and then, at the end of the day, extracted type-by-type onto the print tape, by use of optional additional controls associated with the magnetic recorder. 
     The printed tape is a permanent record of the day&#39;s activity in the parts department, as well as a record of the day&#39;s orders contained on the magnetic tape. At the end of the day, when the parts man is ready to submit orders to the computer 19 at the factory, he places a telephone call with the conventional telephone instrument 17 and dials in his assigned identification code. He is then interfaced with the computer 19 which will accept the data from the magnetic tape unit 15. He then places the telephone hand set on the MODEM unit 16 and activates playing of the magnetic tape through the MODEM unit 16, the telephone 17 and the telephone network 18 to the computer 19. 
     Such daily, or even weekly communication, though it requires typically only a few minutes of telephone time, provides for frequent order fulfillment from the manufacturer&#39;s warehouse. Frequent order and fulfillment capability provides accuracy in &#34;real&#34; inventory maintenance. 
     In an ON-line real-time situation, speedy and frequent delivery must be made in order to justify the high costs involved. Although the instant PMIC system is based on fast and frequent deliver, it can, through the nature of its low cost, maintain a high degree of efficiency while permitting a more modest delivery system in terms of turn-around time. 
     To this point, the PMIC system described has serviced six of the seven critical areas previously stressed including quick access to parts identification and price, fast retrieval from storage bins, complete records, daily ordering and frequent fulfillment. 
     As to up-dating and maintaining a smoothly functioning system, the key is the microfiche as a data base, which is distributed at the remote locations, on safe, read-only microfiche media. 
     A PMIC system requires information that is both accurate and current--current enough for the application, yet costing no more than absolutely necessary. The price microfiche plays a particularly special communications role in providing this information up-date feature, both accurately and economically. Heretofore, a troublesome particularly disadvantageous drawback to the use of microfilm verses paper was the inability to correct errors regarding price or part information. When a parts man became aware of an error he could not make a note of it on microfilm as he could on paper. Now, however, with the advent of the scanner the cooperable COM-generated digital microfiche having high-density digitized information, errors are quickly and economically recified. 
     The price microfiche are replaced at responsible intervals and each may contain a special section which holds inventory up-date information. When the parts man receives a new price microfiche he may place the same in the scanner and press a predetermined address, for example 30-300 on the keyboard and then the PRICE key. In response to this action, the title line of a list of special messages appears on the display. He may, at this point, elect to read these messages one-by-one by pressing the PRICE key each time. Or, he may elect to use the PRINT key and obtain a print out of all the messages. 
     The price microfiche also supplies the corrective information required for a part: substitutions, parts that have become obsolete, new interchangeable parts, replacements, and errors. 
     When the locator number for such a part is used, the display line appears, but special information on the digitized price microfiche energizes, in an automatically flashing manner, a lamp below the PRICE key. This signals that there is corrective information on this part. By pressing the PRICE key, the correct information will appear on the line; in this case, a substituted part number. 
     All of the critical areas noted above have now been served: part identification, price, retrieval from storage, records, ordering, order fulfillment, and up-dating of inventory information and corrections. 
     From the foregoing, it is readily apparent that the PMIC system disclosed herein is a totally integrated communications system which is readily expandable in function to economically meet the data base and random access requirements of business, industry, education military and government. 
     V. SINGLE MICROFICHE CONTROL SYSTEMS 
     A. Banking and Credit Check Examples 
     As mentioned above, bank account signature cards may be placed on viewer-type microfiche with the account number serving as an address of the frame on which the signature will appear. Inasmuch as a great number of signatures can be placed on a frame, account numbers would be grouped and a decoder included to define a common address for a plurality of signatures. Keying in of the account number would then cause the viewer to function as before so that the desired signature, along with signatures of the same frame, will be brought into view for checking the same against the signature on a check, withdrawal slip or the like. 
     Privacy in checking account status and other information may be obtained by utilizing, in a separate system, the scanner 13, the LED display unit 22 and a keyboard, all located in the same housing. Referring to FIG. 1B and FIG. 7, the system would operate as described above such that the account number, properly keyed in, will cause the scanner to find the proper account and provide the account information on the display. FIG. 1B illustrates the scanner 13 connected to the keyboard 82 of FIG. 7 and receiving a digitized microfiche 50 of the type illustrated in FIG. 5, for feeding information to a display unit 22. 
     B. TV Applications 
     Referring to FIG. 7 the circuit is shown adapted for display of the digitized information carried by the scannertype microfiche on a TV set 101, the information being fed from the data processing circuits 96 to the TV set 101 by way of a video display generator 103. The video display generator may be constituted by, for example, the video display generator S68047 manufactured by American Microsystems, Inc. 
     C. Computer Programming 
     Referring to FIGS. 1C and 7, a computer such as a home computer is generally illustrated as comprising a program section including a RAM 105 which is fed by a scanner 13 which receives the program on a digital microfiche 54&#39; of the type illustrated in FIG. 6. In this embodiment, there is no addressing of the scanner and the keyboard and entry register would include a permanent sequential address for sequentially stepping the scanner to output the program to the ram 105. A more simple control circuit may be included in the scanner in place of the microprocessor to merely step the scanner through its sequence of operations. The embodiment of FIG. 5 may also be used as a ROM and accessed by addressing of the scanner by the computer. 
     Although we have described our invention by reference to particular illustrative embodiments thereof, many changes and modifications of the invention may become apparent to those skilled in the art without departing from the spirit and scope of the invention. We therefore intend to include within the patent warranted hereon all such changes and modifications as may reasonably and properly be included within the scope of our contribution to the art.