DDC 223

IMG_0928

I wrote an entry about the company David Computer some time ago. Even after I did some research a lot of things were unclear. However, having read this post, Mr. Pierre Artaz from France contacted me saying that he was in the process of restoring a computer system that says “DDC Computer” on the console (one of the predecessor companies of David).

We wrote back and forth, he send me a bunch of photos, and we think we were able to determine the model that he has. It is a DDC model 223 from about 1980. As you can see on the first picture

  • the machine looks very 70s. Orange with brown, and a little bit of unavoidable grey.
  • the machine is not a small one. The main chassis on the left (which is basically empty) contains the CPU, the memory, and the I/O, the next two cabinets are hard disks with removable disk platters, then comes a desk with a terminal, finally a printer

He sent me also a photograph of the (German) configuration sheet glued on some panel inside the chassis:

IMG_0868.jpg

Ok, so it might be a model “223”. Was there something like that? What do I do if I want to identify a computer model sold in Germany? Of course, I consult the CC Seller archive. And in the “CC Seller EDV 1979” issue, I find the model 223:

  • 96 kB RAM
  • 2 * terminals with 2000 characters each
  • 1 * printer
  • 2 * 14 MB harddisks
  • price: DM 112139 (multiply by a factor of 2.3 for Francs in 1980)

Unfortunately, CC Seller does not tell us anything about the CPU. But if you read my previous entry on David Computer, you know that it was speculated that they used a Fairchild chip that is compatible with the Data General NOVA. I do not have a picture of the CPU PCB (yet), but if you look at the console, what do you see?

IMG_0852

Ok, seems to be a 16 bit architecture. Hmm, it looks very much like this (up to the text for the buttons):

1280px-Nova1200.agr

By ArnoldReinhold – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=3578915

The console of a Data General Nova 1200. I think that basically settles it.

The machine also has extensive paperwork for the hard disks. They came as OEM models from CalComp and are a model T-25 and/or T-50.

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2 Responses to “DDC 223”

  1. David Computer PROFI 203 | Rare & Old Computers Says:

    […] I found out more on a DDC model 223. […]

  2. psychocod3r Says:

    Reminds me of DEC’s PDP line. Weird to see that they were still making computers like this in the early 80’s, given that DEC by that time had moved on to the much smaller VAXen.

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