A little more information, now that I've found my
folder of PC10/PC20
schematics...
The 'motherboard' is really I/O only (looks to be a serial port, a
parallel port, and an FDC). The CPU card plugs into a special slot on
this board -- it appears the CPU is an 8088 with (optional?) 8087
coprocessor.
There were at least 3 video cards : Monochrome (looks to be MDA), Color
(looks to be CGA) and 'Advanced Monochrome' (looks to be Hercules). I
can't be absolutely sure about that because all the cards have programmed
PALs or PLAs on them and I don't have any info on what's inside them. The
only one to have a composite output is the Color one. And none of them
have DIP switches that I can see.
So I would guess the card you have with the DIP switches is a generic
clone card. As is the one with the 2 DA15s on it.
For some ungodly reason I can't find a screwdriver around here to open the
case, but I did boot the machine up. It seems to have DOS 3.21 on it but
the Commodore-specific tools I distantly remember having to use are still
there such as the software SPEED.EXE and something called SETCLOCK.
The card is, unbelievably, VGA -- it's a Cirrus Logic of some iteration
based on the startup with an Award BIOS?
The disk seems to be around 20MB. I'm assuming this is *not* IDE.
Whoever had this last made a hash out of it, files scattered everywhere :-P
The BIOS identifies itself as (C)1986 Commodore Electronics Ltd and seems
to be a Phoenix type. I can't figure out how to get into the BIOS setup.
Neat feature: all the devices are identified with their detected port
addresses.
There is a
SHIPDISK.COM utility which I'm assuming parks the heads, unless
people have another suggestion. Hope so, since this machine will travel about
120 miles on Sunday :-)
Any other ideas until I can get some tools to crack this open and clean up?
--
----------------------------- personal page:
http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- Mmmm, Windows user. Crunchy and good with ketchup. -- Dave McGuire ---------