sarnau wrote:I just found this board in the basement. Am I correct: it looks like a test board for an ST Book?
Fascinating! There's 128k of ROM and 64K of RAM on the board but also a three-wire serial EEPROM… There's also two GAL/PALs (one for I/O, one for Memory?) on there as well…
Any chance you could dump the content of the two EPROMs?