[vcf-midatlantic] FS: Tanner/Digital Research 64K Static RAM for S-100 Bus Tested/Working

william degnan billdegnan at gmail.com
Wed Feb 3 12:43:15 EST 2016

On Wed, Feb 3, 2016 at 11:53 AM, Jeff Galinat via vcf-midatlantic <
vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:

> 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

I agree, I have some other board that is a Tanner but not branded as such.
Fuzzy on the details.

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