Hi Guys,
Still slogging away at our big pile of Commodore PET
equipment. (Having a pretty good success rate so far
- thank god for funet!)
Todays's victims are:
1) Commodore SFD-1001
This is the IEEE-488 (PET) single-drive that looks
very much like a VIC/C64 1541 serial drive.
The drive powers on, and both the POWER and drive LED
come on solid RED and stay that way - no other activity
is observed - it doesn't matter if the IEEE bus is
connected or not, and resetting the IEEE bus (via PET
power-on) has no effect. If the PET tries to access the
IEEE bus, it hangs, presumably waiting for an acknowlege
that never comes (?)
It looks like the on-board CPU is not running at all.
I found some schematics on funet, however I have no experience
with this particular drive at all - anyone have any tips or
pointers? Any known common faults with these symptoms?
2) This is an MSD-SD2, a third party "clone" of the Commodore 2040/4040
drive (Yeah, I know it's not an exact clone as the internals are
different, but it reads/writes 4040 disk format).
This drive powers on and repeatedly flashed an error code consisting
of seven (7) flashes of all three LED's (POWER, Drive1, Drive2).
I can find no service information on this drive at all.
Looking for:
- Info on what the error code means.
- Schematics
- Any other service info/tips.
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
Received on Fri Sep 24 2004 - 17:33:52 BST