New PCB arrived (corrections+added LED), not tried to solder components yet (I don’t have spare parts…)
And I have continued debugging the software with many different ROMs (Grant Searle, RC2014 ACIA, RC2014 SIO/2, my own CPM3 attempts, S100, ZX81!!!…) on the previous V3 board.
Always the same concept, Z80+RAM with PSoC5 as a glue that emulates UART, CompactFlash, decodes address, [PS2 input, VGA ouput]…
Collection of snapshots :
- ‘Grant’ Mode (ACIA, CF) – CPM2.2 ok
- RC2014 ACIA – Basic 56k only
- RC2014 SIO – ROM 24886009 (‘2’ not working ???)
- CPM3 test – bad
- S100 – CF – CPM3 working
For ZX81, it is really preliminary work, not working yet. It basically acts as a logic analyzer that is triggered after a few IOs have been received, then it simply outputs ‘VCD’ like data on the console that I display using GTKWAVE.