At 11:09 pm 19/08/2001 +0200, MagerValp wrote: >>>>>> "AV" == Adrian Vickers <firstname.lastname@example.org> writes: > >AV> First, the 8032-SK. > >AV> This machine acts dead to the world. When powered up, the valve in >AV> the back of the tube glows, but the monitor itself doesn't seem to >AV> come to life. This may just be because I can't hear it whistle, >AV> but I can ususally hear these tubes... Also, the startup beep is >AV> missing, and blind-typing "?chr$(7)[cr]" has no effect. > >I think this narrows down the problem to the power supply, CPU, ROM >or VIA. Well, not too narrow... Hmm... The PSU is (I think) OK - at least, there's some volts coming off it. CPU/ROM/VIA - I've no idea how to check these. Well, I *could* swap them with the other 8032 I've got, but I don't want to try that until I know I'm not going to fry known good chips... Does funet have any chip pinouts? When testing voltages, it would obviously be handy to check across the +ve and GND pins, rather than some signal pins... > >AV> I've taken some photos of the mainboard, because I'm not convinced >AV> the mainboard is fully populated. > >And I think you're right. If you look at the schematics on funet, > > http://www.funet.fi/pub/cbm/schematics/computers/pet/univ2/ It's not working for me ATM, I just get a wee red cross where the picture should be :( >you'll see that the empty sockets are for ROMs: > > Socket Function Type Address > UA3 Characters 2316 or 2332 N/A > UD7 Editor 2316 E000-E7FF > UD11 Expansion 2 2332 A000-AFFF > UD12 Expansion 1 2332 9000-9FFF > >Funet has the necessary ROM images: > >UA3: > > http://www.funet.fi/pub/cbm/firmware/computers/pet/characters-2.901447-10.bin > >UD7: > > http://www.funet.fi/pub/cbm/firmware/computers/pet/edit-4-80-b-50Hz.901474-0 4.bin > http://www.funet.fi/pub/cbm/firmware/computers/pet/edit-4-80-b-50Hz.901474-0 4-3681.bin > http://www.funet.fi/pub/cbm/firmware/computers/pet/edit-4-80-b-50Hz.901474-0 4%3f.bin > >Nope, don't know which one's the best :) These are all for 50 Hz >machines and you're in the UK aren't you? I am. Interestingly, this Hi-res board has sockets marked UD7, UD11 and UD12; the "GRAPHIX17/B" chip is in UD7, theres an un-marked ROM in UD11, and UD12 is empty. Next question: How do I turn the ROM images into chips? Add salt & vinegar? ;) 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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