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8080 single board computer?

snuci

snuci

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Joined
Nov 22, 2012
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Location
Richmond Hill, Ontario, Canada
This is probably the wrong forum but it's S-100 era so I apologize if it should be somewhere else.

I bought a bunch of items from someone recently and within a home-made computer keyboard enclosure (that looks totally cool) was, I believe, a full single board computer. That was a surprise to say the least. I've included a high resolution picture below. Has anyone ever seen it? I'd love to know what it is and who made it. Is there enough there to be a whole computer? The keyboard attached to the home-made case is made by Micro Switch. Looks to be from mid 70's?

8080 SBC.jpg

Edit: Sorry, it got resized. You can download a hi-res picture at this link here
 
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Google "8080a hpr01" and you will find it. Seems to be a serial interface for Xerox Diablo terminals and printers.
 
snuci said:
As that was the only chip that could be removed, I did take a quick look. Here's a pic.

View attachment 22586

Seems a little late for the way it is marked and I'm surprised it wasn't stamped a little more cleanly.
Click to expand...

CPU is in very good sharp, date 7604 is perfectly matches the early computer board.

Thank you.
 
For clarification, this is what the C8080a board was in. I thought it was cool just as a keyboard but we now know it has smarts. Note that the keyboard has the same key layout as the Diablo linked above:

8080 keyboard.jpg

This is the very definition of"homebrew" and I love it :)
 
On a related note, in a pile of documents I found the "Theory of Operation" schematics for this board (the HPR01) and the companion HPR02. It must have been available separately.
 
I'd sure love to see a high rez of the schematics, just for the fun of it. Can't make any practical justification. :)

Be careful handling the 8080 chip... don't want to zap it with static electricity. I just had to mention that just in case... I assume by your VCF membership stats in the right corer of your post that you'd know that.

Yeah that photo of the keyboard does look a little different from the photo of the Diablo terminal. I can see why that level of electronics was a surprise.
 
I saw the pressboard and 1x2 construction in your picture and for a moment I thought, "Wait, is this something *I* built?" A closer look at the details, though, and no, it's not. But the same basic techniques in many ways.
 
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