Search results

So I’ve had a good play around with the scope. I can’t see anything horrendous. Whilst playing around with the various pins on UC7 I noticed I can change the displayed image in a pretty persistent way - it seems to persist across reboots! Plan A now is to get some sockets and some spare UC6...

@Kai Robinson I’ve just checked my schematics. UB10/11 are sound chips. I think you must mean UC6/7 they are shown as Video RAM on the schematics?

UF8 replacement originally restored VSYNC - that’s been done along with a UE8 replacement for good measure. i will take a look at UB10 and 11. I have another board (not working) that I could use as a donor if needed. I have a scope available but am a complete novice with it - could this help...

UF8 replacement originally restored VSYNC - that’s been done along with a UE8 replacement for good measure. i will take a look at UB10 and 11. I have another board (not working) that I could use as a donor if needed. I have a scope available but am a complete novice with it - could this help...

“I have swapped RAM and ROMs…” Yes. I’ve also tried a different video ROM. It doesn’t look like the images of semisamac that I have seen elsewhere

I’ve been working on this SE/30 board for some time and am pretty stuck at the moment. Board has been recapped. Original problem was no VSYNC. I fixed this by replacing UE8, UF8. I now get the screen shown in the photo. I believe, based on HDD activity that the machine is booting fine, but...