On 2/3/2016 11:06 AM, Herb Johnson via vcf-midatlantic wrote:
Your eBay description and discussion here, refer to the S-100 card as "a Digital Research product".
Digital Research Computers/Corporation or DRC of Texas was a small manufacturer of S-100 cards and systems. I recall "DRC of Texas" ads in a number of period magazines.
I don't know about the Tanner/DRC association. My recollection is that the cards are at the least similar. Jonathan, are they identical? If so, it may simply be a copy. Such things happened in the era without a business sale/purchase, but let me know of any further info, if you please.
Herb Johnson
Hi Herb & Jon, The 64K static RAM DRC/Tanner Computers design must have really got around as I also have the exact board sold by COEX except it uses a large TO-3 5V regulator instead of 2 smaller TO-220 5V regulators. Everything else is identical including the component legend/silkscreen. I also have a 32K Tanner Computers board that also uses 2K RAMs or EPROMs that is very similar, only half the capacity. Regards, Jeff