Do you want photos of the screen?
I've been (having a go at) identifying the chips to see if there are any likely broken traces between them. I'm using the board, the developer notes and the internet as my points of reference
I've been (having a go at) identifying the chips to see if there are any likely broken traces between them. I'm using the board, the developer notes and the internet as my points of reference
- U26 should be CLUT/DAC (code-named Antelope), should have:
- D31-0 that goes to ROM, RAM, VRAM, CPU, MEMCjr and PrimeTime
- Some pins that go to MEMCjr (presumably for control/timing)
- Pins that go to the video signals on J13-B
- U17 seems to be MEMCjr, from what I have found online.
- A31-0 that go to CPU, ROM (A22-2), PrimeTime, SCSI/53C96 (A7-4), SCC (A2)
- D11-0 (ROM/RAM/VRAM/Antelope/PrimeTime)
- VA8-0 (VRAM SIMMS)
- BDA11-0 (RAM + RAM SIMM)
- Some Signals that go to Antelope/U26
- U12 seems to be PrimeTime