At 11:09 pm 19/08/2001 +0200, MagerValp wrote:
>>>>>> "AV" == Adrian Vickers <avickers@solutionengineers.com> 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
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