Were both Memotech MTX and TEC-1 single-board kit computers?
TEC-1 The TEC-1 is a single-board kit computer first produced by the Australian hobbyist electronics magazine Talking Electronics in the early 1980s. It was based on the Zilog Z80 CPU, had 2K of RAM and 2K of ROM in a default configuration. Later versions used a 4k ROM with two different versions of the monitor software selectable via a switch. This allowed the early software presented in the magazine to be used with the later version of the TEC-1.
SYM-1 The SYM-1 was a single board "trainer" computer produced by Synertek Systems Corp in 1975. It was designed by Ray Holt who also designed the first microprocessor chip set used in the CADC for the F-14 Tomcat. Originally called the VIM-1 (Versatile Input Monitor), that name was later changed to SYM-1.