Commodore PC-20-III

From: Don Maslin <donm_at_cts.com>
Date: Fri Apr 26 23:22:58 2002

On Sat, 27 Apr 2002, Tony Duell wrote:

> >
> > Well, I'm now the (proud?) owner of a Commodore PC-20-III. Ironically, this
>
> 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.

Tony, the Paradise Autoswitch EGA 350 Card has two RCA jacks and a DE-9
receptacle along with an 8-position DIP switch. The unit will auto
select between EGA, CGA, and Hercules or MDA at the DE-9. The RCA jacks
are not composite video and are to conform to the IBM EGA card
configuration.
                                                - don

> 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.
>
> -tony
>
Received on Fri Apr 26 2002 - 23:22:58 BST