Desperado
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Not...i don't believe....
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CBM PET 3032 STRANGE BOOT
- Thread starter Desperado
- Start date
daver2
10k Member
So which thread did we initially fix this PET in?
Because the faults are very similar to this board...
Dave
Because the faults are very similar to this board...
Dave
Desperado
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i am desperate...i don't remember unfortunately
daver2
10k Member
Yes, you can try it...
Dave
Dave
daver2
10k Member
Well, are there some wires on the back of the board between UD6 and UD7? Also, have the UD6 and UD7 sockets been replaced?i am desperate...i don't remember unfortunately
You also don't need to remember if you keep a logbook of repairs, and include the board serial number...
Dave
Desperado
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no wires....
yes i replaced !
so..i leave nivag s board with these setting and i replace only ud8?
daver2
10k Member
>>> so..i leave nivag s board with these setting and i replace only ud8?
Yes.
All of Nivag's ROM links should be set to OFF now. Is this correct?
Dave
Yes.
All of Nivag's ROM links should be set to OFF now. Is this correct?
Dave
Desperado
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yes all Rom Links are set to OUT
daver2
10k Member
I just corrected my own post... The links should be set to OFF not OUT!
Dave
Dave
Desperado
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yes sorry..OFF!
daver2
10k Member
Why are you desparate (and in capitals)?
With Nivag's board configured with all of the ROM links to OFF it is using all the ROMs in the PET. You haven't got the PETTESTER mapped in on Nivag's board - if that is what you were thinking?
Are you sure you know what Nivag's board is actually doing for you?
Dave
Desperado
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oh yes...it's true!! With Nivag's board set to off, now i have only pet roms! So this mean that Pet is now working??
daver2
10k Member
Hey,
I have just made it to 10,000 posts. 10,001 now!
Dave
I have just made it to 10,000 posts. 10,001 now!
Dave
Desperado
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Wow good great achievement! unfortunately it is also my fault!
daver2
10k Member
Correct!
Now, what you have to work out is:
1. Does the PET now work by accident, in which case it will go faulty again... or
2. Your PETTESTER EPROM you were using is faulty.
Dave
daver2
10k Member
Can you put your PETTESTER EPROM in your EPROM programmer/reader and tell me what the checksum is reported as being please?
Dave
Dave
Desperado
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daver2
10k Member
Ok,
Can you change Nivag's board and set the ROM E link ON (to enable Nivag's PETTESTER code).
Then swap the ROM in socket UD7 for your PETTESTER EPROM.
Give it a run...
What we are going to do is to checksum the PETTESTER ROM in socket 'd'.
The PETTESTER code will think that there is a 4K ROM in UD7, so it will attempt to check it twice. I will have to compensate for that if I can.
Can you ensure the 'd' checksum that is displayed is stable. If it isn't, we can't use this test.
Dave
Can you change Nivag's board and set the ROM E link ON (to enable Nivag's PETTESTER code).
Then swap the ROM in socket UD7 for your PETTESTER EPROM.
Give it a run...
What we are going to do is to checksum the PETTESTER ROM in socket 'd'.
The PETTESTER code will think that there is a 4K ROM in UD7, so it will attempt to check it twice. I will have to compensate for that if I can.
Can you ensure the 'd' checksum that is displayed is stable. If it isn't, we can't use this test.
Dave