This page was most recent revised date June 7 2011.
Digital Group was a small company in the mid-1970's which produced their own design of microcomputers based on their own "bus" architecture, not on any single 8-bit microprocessor. I have just a few DG boards, which I acquired May 2010.
If you have more info on these boards, and of course if you want to buy or discuss these, contact me.Here is how to email @ me and ordering instructions.
We have some other old computer cards as well. Check my STDbus, VME, & Multibus page for links to boards supporting those bus standards. My S-100 home page for boards and docs for the IMSAI, MITS Altair and 100's of other vintage S-100 computers. I have Mac and SGI stuff as well.
- Herb Johnson
Here's an image of two Digital Group boards. The board at the top of the photo, has four large 74100 chips near the edge connnector; I have two of those. The board at the bottom of the photo, has four 8251 chips near the top of the board; those are serial I/O chips. These boards have a 72-pin edge connector and a 44-pin connector.
Here's an image of two Digital Group boards. the board at the top of the photo is a RAM card with a 72-pin edge connector, I have two of those. The board at the bottom of the photo is the same as the board at the top of the previous photo.
Here's an image of what I believe is a DG CPU board With a 100-pin connectro. The daughter card is some kind of interface, probably SASI for a SASI to something hard drive controller.
Here's some boards I can't yet identify, but they have 44-pin edge connectors and they came with the DG boards. Photos boards #1 boards #2 boards #3 boards #4 from General Computer Technology company in 1978.
Also, this board appears to be a ROM replacment board of some sort.
I was a vendor at VCF-E in May 2011, and there was a Digital Group exhibit there. (Photo courtesy of Christian Liendo.)I met with Michael Hill and we discussed my DG boards. Here's a few photos of his exhibit. From examining the motherboard displayed there, I realized I may have a DG CPU board. As its connector did not match the other boards I had, I assumed it was some other kind of board. But the DG systems used a variety of boards. We'll have more about our discussions on this Web page, later. As of May 2011, Mike's site was in progress.
Mike recommended the Digital Group Web pages on "bytecollector.com" for more information about the Digital Group, including documentation. The site owner notes he will not update the site but will keep it on line "for years" as of 2008-2009.
Herb Johnson
Copyright © 2011 Herb Johnson
New Jersey, USA
here is how to email @ me
