Re: [midatlanticretro] Zenith ZDH-1217-DK
I have a processor card and a backplane that may be from the same type
of machine. My card as a 286 processor running at 8MHz and uses a 16-bit
AT-style bus. When I first got it, there was no web to search but there
was nothing on the Zenith forum on CompuServe. I did have it up and
running several times. Is the video actually on the processor card? You
may be able to pull the video card and plug a VGA card in its place.
> I have this old PC, it looks on the outside like an XT style PC, but
> inside, it resembles more of the "mainframe" style computers, where you
> have the expansion bus, then the processor card, interface cards, etc.
> So it doesn't have a typical XT type motherboard. I don't have a CGA or
> mono monitor as I am not sure which it would be for that machine.
> I haven't been able to find any documentation for this machine on the
> web. I haven't taken out the cards yet to see what particular processor,
> what size HD, etc. I had gotten a 16 bit VGA card hoping it was one of
> those ones that would be able to do 8 or 16 bit, but I would probably
> need to disable the onboard CGA/MONO card even for it to be recognized.
> It "sounds" fairly healty otherwise.
> Does anyone know anything about this machine? Like if there is a way via
> dip switch to disable the video, because there are 4 cards in it. One
> has the floppy controller, serial and video output ports, the 2nd has
> the RAM on it, as well as a parallel port, the 3rd has the keyboard port
> on it, and the 4th is actually a simple one, it's JUST the hard drive
> interface card. The other 3 seem to each have a variety of uses. Once I
> pull it apart and look at the chips on there, I will have a better idea
> of what board does what.
> Also, I know there is an EPROM on the 1st board, the one with the video
> and serial ports. Also, that board, as well as the keyboard port board
> have push buttons on them also, which I also have no idea what they are for.