New Zealand Vintage Computer Forums

For CRT cpu:

0x70, 0x73 i8255 1
0xb0, 0xb1 mc6845
0xd0, 0xd3 i8255 2

For IPL cpu:
0xe0, 0xe1 i8251 1
0xe4, 0xe7 fdc
0xe8, 0xeb i8255 (not sure 1 or 2)
0xec, 0xed i8251 2

Now need to figure how they talk

A team member made communication work between cpu's and here is screen :



So ROM's are fine. When I put disk image it start booting but I get "MEMORY ERROR" since
memory banking is not properly implemented and it is expected that full 64KB area is RAM.

Ha! That's totally awesome, well done.