At 12:08 am 20/08/2001 +0200, MagerValp wrote: >>>>>> "AV" == Adrian Vickers <email@example.com> writes: > >AV> Hmm... The PSU is (I think) OK - at least, there's some volts >AV> coming off it. CPU/ROM/VIA - I've no idea how to check these. >AV> Well, I *could* swap them with the other 8032 I've got, but I >AV> don't want to try that until I know I'm not going to fry known >AV> good chips... > >Unless you have a short circuit somewhere (chips getting REALLY hot >and +5V measuring something like 2-3V) it should be safe to swap >chips. I'd suggest unplugging the hires graphics board and putting the >character rom and editor rom from your other 8032 in UA3 and UD7. Hi, OK, I tried that - no change. Still no bleep, no screen. I didn't try swapping the 6502 out; I may put that in the good 8032 to see if it works. Also, I checked the voltage at the CPU - 5.23 volts and as stable as you like. I'll check the 6545A next to it if I can find a pinout, as that one seems to be getting a bit on the warm side. <pause for websearch> Hmmmmm.. CRT controller, eh? I wonder if I've just found the problem? I bet it's not possible to get these chips anymore. It doesn't help that it's not socketed either :( > >AV> Does funet have any chip pinouts? > >Don't think so, and strangely enough all my web searches for 2316 or >2332 pinouts turn out blank. Could someone who knows the pinout please >submit it to the chip directory? There's something about the 2332 on funet; I've not tried downloading it yet (still getting the 6545 data sheet...). >AV> Next question: How do I turn the ROM images into chips? Add salt & >AV> vinegar? ;) > >You'll have to get an EPROM burner or have someone with an EPROM >burner do it for you. Unfortunately my PC with the burner is dismant- >led at the moment. I shall probably buy a burner. I've actually got one for the BBC 'B', but all the leads & software are missing. It'd be cool to use it though: An early '80s Beeb fixing an early '80s PET; there's a nice symmetry to that. Cheers! Ade. -- B-Racing: B where it's at :-) http://www.b-racing.co.uk Message was sent through the cbm-hackers mailing list
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