the system comprises a game processor ( the game device proper ) 10 , commonly referred to as a family computer ( a super family - computer ), a controller 20 , which serves as an input unit or manipulating device , detachably connected to the game processor 10 , a memory cartridge ( or memory cassette ) 30 removably inserted into the game processor 10 , and a crt display unit 40 ( such as a television receiver or monitor display device ), to which the game processor 10 is detachably connected , for presenting a video screen on which the game appears . the game processor 10 has a central portion of the upper side of which has an insertion slot 12 , equipped with a cover , into which the memory cartridge 30 is removably inserted . a connector 56 ( see fig2 ), to which the pins , conductive patterns or electrodes of the memory cartridge 30 are connected , is provided in the interior of the insertion slot 12 . provided in front of the insertion slot 12 are a power switch 13 , a reset switch 14 and an eject button 15 , which is for ejecting the memory cartridge 30 . the front end of the game processor 10 is provided with connectors 16 to which the controller 20 is detachably connected . the controller 20 is provided with an a button 21 for decision making , a b button 22 for cancelling purposes , an x button 23 for selecting a menu display , a y button 24 , a start button 25 , a select button 26 and a joy pad ( or joy stick ) 27 for moving a cursor up , down , left and right on the display screen , as well as other buttons ( not shown ). in this embodiment , the a button 21 , b button 22 , x button 23 and the joy pad 27 are used in order to perform various input operations . fig2 mainly illustrates the electrical configuration of the game processor 10 in simplified form . the game processor 10 includes a cpu ( central processing unit ) 50 , which controls the overall operation of the video game . the execution program of the cpu 50 is stored beforehand in a rom 31 incorporated in the memory cartridge 30 . data representing an image displayed on the display unit 40 also is stored in the rom 31 . the rom 31 is connected to the cpu 50 by a system bus ( inclusive of a data bus , address bus and control lines ) through the connector 56 when the memory cartridge 30 is connected to the game processor 10 . preferably , there are provided a ram for saving data such as the maximum value ( max value ) or present value ( hit points ) of the player character &# 39 ; s survivability , described below , in order that the game may be continued at a subsequent time , as well as a battery for backing up the data stored in the ram . in the game processor 10 , a working ram 51 for storing various data during the progress of the game and for serving as a counter , a video ram 52 for storing image data read out of the rom 31 and subjecting the data to necessary processing , and an image processing unit 53 which creates a video signal for display purposes based upon the image data from the ram 52 are connected to the cpu 50 by the system bus . the video signal outputted by the image processing unit 53 is applied to the display unit 40 upon being converted into a signal suitable for being supplied to the display unit 40 , such as an ntsc television signal , by a modulating circuit 54 . one controller 20 ( is only one player is playing the game ), or two controllers 20 ( if two are playing the game ), is connected to the game processor 10 , and the various signals from the controller 20 are inputted to the cpu 50 via an interface 55 . one or a plurality of player characters and one or a plurality of enemy characters appear on the screen of the display unit 40 . the player character ( s ) is moved in accordance with an action command provided by the player via the controller 20 . more specifically , the player selects the type of attack , etc ., displayed on the screen of the display unit 40 ( selection refers to as the inputting of a command ), in response to which the player character acts to perform the selected attack , etc . the enemy character moves in accordance with a predetermined action command ( a decision regarding battle operations ). the movements of the player character and enemy character , i . e ., their actions in combat , are executed repeatedly without interruption while time is passing at a fixed rate . this shall be referred to as “ active time battle ”. fig3 illustrates the actions of the player character and enemy character in active time battle . in the illustrated example , the actions of two player characters p 1 , p 2 and two enemy characters m 1 , m 2 are shown . the player characters p 1 and p 2 will be described first . at the start of the game of at the end of a combat operation such as an attack , a standby time that has been set for each character starts being clocked . the standby time represents the quickness and agility of the character . when the standby time elapses , the input of a command is allowed . at this point in time the player is capable of selecting a combat operation ( making a command input ) that is being displayed . when the command is inputted , the processing corresponding thereto is executed ( this is a command decision ) and then action preparation time for execution of the command starts being clock . action preparation time is a time specific to the type of action and is set for each type of action . when this time elapses , the aforementioned action for the designated combat operation is initiated and then standby time starts being clocked again . input of commands is unnecessary for the enemy characters m 1 and m 2 . when the standby time set for each enemy character and representing the quickness and agility of the character elapses , the conduct of the character is decided . though the type of combat operation of an enemy character is predetermined , there are cases where the combat operation changes depending upon the circumstances , as will be described later . when the action preparation time regarding the conduct that has been decided elapses , the combat operation decided is carried out , after which the standby time starts being clocked again . the foregoing processing is repeated for the enemy characters . in active time battle , as will be appreciated from fig3 the standby times and action preparation times of the enemy characters m 1 and m 2 elapse from moment to moment ( the clocking of these time periods continues without interruption ) even while the players are making command inputs for the player characters p 1 and p 2 ( i . e ., while the players are considering how to maneuver the player characters through a combat operation ). accordingly , there are instances in which a player character sustains an attack from an enemy character even while a command input is being made . thus , a game excelling in realism and thrills proceeds at a speedy pace in a mode approximating actual combat . theoretically , it will suffice if only standby time or action preparation time is set for an enemy character . however , it is preferred that both times by provided in a case where the type of combat operation ( action or conduct ) of an enemy character changes , in accordance with the program , depending upon the prevailing circumstances . fig1 illustrates an example of a menu screen displayed on the display 40 . the menu screen is capable of being called by pressing the x button 23 on the controller 20 . a cursor ( or pointer ) cu representing a pointing hand is displayed not only on the menu screen but also on other screens . the position of the cursor cu on the screen can be moved by the joy pad 27 on the controller 20 . if the a button 21 is pressed after the cursor cu has been moved to a desired position , an item represented by the display indicated by the cursor cu is selected and inputted . battle mode and battle speed can be selected on the menu screen . the battle mode includes a wait mode and an active mode . the wait mode is one in which the passage of time ( i . e ., the clocking operation ) is suspended ( in this embodiment , a case in which “ magic ” or “ item ” has been selected ) with regard to a specific command input during a command input operation . of course , it is permissible to halt the passage of time for all command inputs . the active mode is one in which time is constantly passing , i . e ., in which the clocking operation continues ( even when a command input is in progress ). battle speed means the speed at which time passes during the game . specifically , the standby and action preparation times for all of the characters are varied in proportional fashion . in this embodiment , battle speed is capable of being set to five levels . fig1 illustrates an example of an initial screen . this screen is displayed when the game starts . in this example of the display , three player characters aaa , bbb , ccc of three types and three enemy characters aaa 1 , aaa 2 , aaa 3 of one type appear . the lower half of the display screen is provided with two windows w 1 and w 2 . the window w 1 relates to the player characters and displays a numeral ( a denominator ) representing the max value ( maximum value ) of the survivability of each player character and a number ( a numerator ) representing the present survivability ( hit points = hp ) of each player character . the hit points are decremented in conformity with the type of attack sustained whenever an attack is received from an enemy character . it is shown in the window w 2 that three enemy characters of type aaa appear . fig4 through 6 illustrate various areas set in the working ram 51 of the game processor 10 . these areas are set or created in accordance with a program or data that has been stored in the rom 31 of memory cartridge 30 at the start of the game , or they are created by loading the data that has been saved in the ram of the memory cartridge 30 . fig4 a illustrates areas used as pairs of counters and flags . a standby - time counter and a action preparation - time counter are provided for each character , and each counter is equipped with a flag . data representing standby time or action preparation time is loaded in the counters , and the value recorded in a counter is decremented at elapse of the fixed period of time . when a counter value is decremented down to zero , the corresponding flag turns on . a greater number of counters may be provided for each character . fig4 b illustrates an area for storing a command inputted for a player character . fig5 a illustrates a flag area . this flag area is provided with an active / wait mode flag which stores the set mode ( the active mode or wait mode ), a flag which turns on when “ magic ” or “ item ” has been inputted , a command - input enable flag which turns on when a player is allowed to make a command input ( i . e ., when standby time has elapsed ), and a command - input completion flag which indicates that a player has inputted a command . fig5 b illustrates an area for storing the max value and hit points of the survivability of each character . max values and hit points are provided not only for the player characters but also for the enemy characters . these values for the enemy characters are not displayed on the screen . when the hit points become zero , the player character faints and the enemy character vanishes from the screen . fig6 a illustrates an area of data relating to standby time . as described above , standby time represents the quickness or agility of a character and is stipulated for each character . in this embodiment , a basic value of agility ( standby time ) common to all characters and an agility coefficiency that has been stipulated for each character are set . the value initially set in the standby - time counter of each character is obtained by multiplying the basic value by the coefficient of the character . fig6 b shows a data area relating to action preparation time . action preparation time is stipulated in dependence upon the type of action ( attack , etc .). a basic value of action preparation time and a coefficient of action preparation time , which is for each type of action , are stipulated . the action preparation time for each type of action is calculated by obtaining the product of the aforementioned basic value and coefficient , and the calculated action preparation time is preset in the action preparation - time counter . by changing the basic value of standby time and the basic value of action preparation time in dependence upon the set battle speed , the speed at which time passes can be altered even if the time interval at which the counter is decremented is fixed . of course , a change of battle speed can be achieved also be altering the speed of counter decrementing processing , altering the aforementioned coefficient , etc . the cpu 50 executes processing in accordance with the program that has been stored in the internal rom 31 of memory cartridge 30 . fig7 mainly illustrates the part of this processing which relates to decrementing of the counters . step 101 in fig7 is an initializing step , in which all of the flags accompanying the counters shown in fig4 a are turned off . next , at step 102 , a value representing standby time is calculated for every character , in conformity with the set battle speed , using the basic value of standby time and the agility coefficient , and the calculated value is set in the corresponding standby - time counter . based upon the flag area shown in fig5 a , it is determined at step 103 whether “ magic ” or “ item ” has been set . if the answer is no , the program proceeds to step 105 . if the answer is yes but it is found at step 104 ( no ) that the prevailing mode is not the wait mode , the program proceeds to step 105 . as long as the flag accompanying the standby - time counter is off ( no at step 105 ), the value in the standby - time counter is decremented at step 106 . this processing is executed at a fixed time interval with regard to all of the standby - time counters until the value in the particular standby - time counter becomes zero ( steps 107 and 109 ). when the value in the standby - time counter becomes zero , the corresponding flag turns on ( steps 107 , 108 ). if “ magic ” or “ item ” has been selected and the wait mode has been set ( yes at step 103 and 104 ), the processing of steps 105 through 108 is skipped . thus , in the wait mode , the passage of time stops in specific cases . the processing of steps 103 through 109 is executed not only for the standby - time counters but also for the action preparation - time counters . that is , “ all counters ” mentioned in the block of step 109 refers to all of the standby - time counters and action preparation - time counters . unless initial values are preset , the decrementing processing is essentially meaningless . since it is unnecessary for the standby - time counter and action preparation - time counter for one character to operate simultaneously , it can be so arranged that one counter area is used alternately as the standby - time counter and action preparation - time counter . the counter decrementing processing of fig7 can also be executed as processing based upon an interrupt at fixed times . fig8 mainly illustrates a flag - decision processing procedure executed by the cpu 50 . when any flag accompanying a counter is turned on ( yes at step 111 ), it is determined at step 112 whether the flag is attached to a standby - time counter or a action preparation - time counter . if the flag relates to standby - time counter , this means that the standby time has elapsed . it is then determined at step 113 whether the standby time has elapsed for a player character or enemy character . in a case where the standby time for a player character has elapsed ( yes at step 113 ), the status of an input enable flag is checked and , if the fag is still off ( no at step 114 ), a screen requesting a command input is displayed and the input enable flag is turned on ( step 118 ). an example of the screen which request a command input is shown in fig1 . the display in this example is for a case where the standby time of the player character bbb has elapsed . the display of the player character bbb changes to a special form ( e . g ., the color of the character changes , the character flashes or emits light , etc ., as indicated by the hatching in fig1 ) and the alphabetic letters of the player character in the window 1 also changes to a special form ( e . g ., the letters change color or flash , etc ., as indicated by the hatching in fig1 ). further , a window w 3 opens , the type of command is displayed and the cursor cu appears at the position of window w 2 . here “ fight ” indicates the most common attack against an enemy character . “ item ” means that a special form of attack can be selected . there are many other types of commands besides that mentioned above . fig1 illustrates an example of a display which prevails at elapse of the standby time for the player character ccc . here “ magic ” is added as the command displayed in the window w 3 . thus , the type of attack that can be utilized differs depending upon the character . fig1 also illustrates an example of a display which prevails at elapse of the standby time for the player character ccc . when the player character selects “ item ”, the display changes as shown in fig2 so that a special attack or defense can be selected . a window w 4 for selecting the contents of the item opens and “ recovery ”, “ return ”, etc ., are displayed . “ recovery ” means that the survivability of the corresponding player character is capable of being restored to the max value . “ return ” means that another player character that has fainted because its hit points have become zero is capable of participating in combat once again . the numerals “ 99 ”, “ 26 ” indicate the number of times these commands can be used . the up and down arrows on the right side of window w 4 indicate that other items are capable of being selected by scrolling the window w 4 up or down . when such an item has been selected , the counting operation of the counter stops , as set forth earlier , if the present mode is the wait mode . the same is true when “ magic ” has been selected . with reference again to fig8 it is determined at step 115 whether the input of the command has been completed if the command input has been allowed ( yes at step 114 ). input of a command is construed to have been completed when one command ( with the exception of “ item ” and “ magic ”) has been selected from window w 3 or w 4 . the input of the command is performed by moving the cursor cu to the position of the desired command using the joy pad 27 and then pressing the a button 21 . if a command is inputted , the command is analyzed at step 116 . for example , when “ item or “ magic ” has been selected , the display changes over to that shown in fig2 in order that a specific command may be further selected . in the case of another command , the action preparation time conforming to this command is calculated using the data shown in fig6 b and this time is preset in the action preparation - time counter for this character at step 117 . this action preparation - time counter is decremented by the processing shown in fig7 . when a command is inputted , the display changes from that shown in fig1 to that shown in fig1 . here the player character bbb assumes a state in which it is prepared to attack . the cursor cu is displayed in order to select which enemy character to attack . the player moves the cursor to the position of the desired enemy character and then presses the a button 21 so that the enemy character to be attacked can be designated . in a case where the standby time for an enemy character has elapsed ( no at step 113 ), the action ( attack ) of this enemy character is decided at step 119 and the action preparation time for the action that has been decided is preset in the action preparation - time counter of this enemy character at step 120 . in general , the action of the enemy character is decided depending upon the type of the enemy character . however , when there is a change , such as a reduction in the number of enemy characters , action for carrying out a stronger attack is set . in a case where a flag that has been turned on is one attached to a action preparation - time counter ( step 112 ), processing proceeds to action processing shown in fig9 . in fig9 it is shown that action execution processing includes display - screen processing , hit - point computation ( subtraction ) and processing for turning off the command - input completion flag . for example , since the enemy character aaa 2 has been attacked by the player character bbb , the enemy character aaa 2 is decremented by 1470 points , as shown in fig1 . since the hit points of the enemy character aaa 2 become zero ( or a negative number ) owing to the score decrementing operation , the enemy character aaa 2 vanishes from the screen , as shown in fig1 . in a case where the enemy character aaa 1 attacks the player character bbb , the enemy character aaa 1 emits light and the player character bbb , which has sustained damage as a result of the attack , has its score reduced by 340 points , as illustrated in fig1 . as a result , the hit points of the player character bbb become 2420 − 340 = 2080 as shown in fig1 . thereafter , the standby time of the character which has executed an action ( which has performed an attack , etc .) is present in the standby - time counter for this character as step 122 . fig1 illustrates interrupt processing executed when a player inputs a command . when it has been confirmed that the flag which enables input of a command has been turned on ( yes at step 131 ), the program proceeds to command input processing at step 132 . for example , when a command input other than “ item ” and “ magic ”, such as the “ fight ” command , has been inputted , this command is stored in the input - command area ( fig4 b ), the command - input enable flag is turned off and the command - input completion flag is turned . in the case of the “ item ” or “ fight ” input , a flag to this effect is turned on . thereafter , when the specific command for “ item ” or “ fight ” is inputted , the input - enable flag and the “ fight ” or “ item ” flag are turned off , the inputted command is stored and the command - input completion flag is turned on . as many apparently widely different embodiments of the present invention can be made without departing from the spirit and scope thereof , it is to be understood that the invention is not limited to the specific embodiments thereof except as defined in the appended claims .
disclosed in a video game of enhanced realism in which actual combat is closely simulated . the game is so adapted that an enemy character on a display screen may launch an attack against a player character on the same screen , even while the player character is the process of inputting a command , at elapse of a set time period specific to the enemy character . the attack is made without an interruption in the flow of time of the game .