From: B. Degnan (billdeg_at_degnanco.com)
Date: 2006-10-08 03:38:53
Andre,
Yes the first picture is of my 9090 drive...
Thank you for passing along this information. I will check my drives too,
to see if I have a match. I also am very curious about the add-on
card. In some of the pictures you'll notice that the monitor board had
popped out of it/s riser clips. I have since then re-attached it. The
pics are from the initial inspection.
I have three pages of notes to be posted soon. Here is a summary.
The system powers up, but there is no picture. The drive returns the same
IEEE drive OK flash pattern, but SHIFT+RUN/STOP does not initiate a search
for a program to run. The only thing I have done so far is unplug the
keyboard and attach to a nearby CBM 256 Hi-profile B series to verify that
the keyboard is sending a signal to the computer. The keys pressed do not
match what appears on the computer. So at least in this case the CBM 256
hi-profile does not have the same external keyboard layout as this
8296. For example press j and get 7, @ = 9, shift = w, repeat=e, 4 on
keypad = a...
the disk drive controller is P/N 251203 rev B 1983
It could take a while to restore this system, but I believe I have enough
parts around to try.
vintagecomputer.net/commodore/
Bill D
At 10:09 PM 10/7/2006 +0200, you wrote:
>Hi Bill,
>
>just some notes:
>
>- the 25pin d-sub connector indicates that this really is a 8296
> PET board
>- As far as I can see the 8296 board is a from an 8296, not a
> 8296-D, as the latter had a switched power supply and none of
> the big capacitors and/for the on-board regulators of the 8296
> like this board here.
>- I find it interesting that the disk drive uses two 6502 instead
> of a 6502 and a 6504, but I have to check with the schematics
> of the other disk drives.
>- The first image seems to be of a 9060/9090 harddisk, not of the
> PET?
>
>Andre
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