View Full Version : Help me identifying this card?

May 27th, 2008, 11:13 AM
I got a couple of boxed with old computer stuff today. Mostly Amiga and Atari ST things, but this little card was at the bottom of one of the boxes:
http://www.postimage.org/Pq1Ll9lS.jpg (http://www.postimage.org/image.php?v=Pq1Ll9lS)

What the heck is it? My first guess would be an ISA-card of some sort...

Does anybody recognize this card?

// Z

May 27th, 2008, 12:07 PM
Higher res image please. Can't see the numbers on the chips.

May 27th, 2008, 01:05 PM
Better pictures:
http://www.postimage.org/Pq1LKzIA.jpg (http://www.postimage.org/image.php?v=Pq1LKzIA)
http://www.postimage.org/aV1j0570.jpg (http://www.postimage.org/image.php?v=aV1j0570)

Edit: I just saw that I still couldn't read the numbers on the chip at U1... Here it is:
http://www.postimage.org/Pq1LL7DA.jpg (http://www.postimage.org/image.php?v=Pq1LL7DA)

// Z

May 27th, 2008, 04:47 PM
Looks like an early external CD-ROM controller board, using a proprietary IDE-XT-type interface. The 40-pin connector is a giveaway for IDE, but the lack of a ROM chip or internal connector indicates that it was not meant for hard drives.

May 27th, 2008, 05:52 PM
I don't know, I am guessing here but a pair of MC6821's would give you a lot of parallel IO capability and bidirectional discretes. My guess it is some sort of industrial controller interface maybe a local varient or unique part. Certainly, it is not very common whatever it is.

Best of luck in your search. Thanks!

Andrew Lynch

May 28th, 2008, 08:34 AM
I'm with Andrew on this one; not really the chips & connector you'd expect for an external CD-ROM, but all my analog & digital I/O boards use those 40-pin connectors.

Looks like a general purpose digital I/O board; shouldn't be too hard to figure out the port addresses and actually use it.