Vintage S-100 cards - test-drb@ccmp.vtda.org

29 May 1999

I have to admit, the 2414 is a strange number to me also.  I looked up the
NEC DRAMs though, and the uPD414C would have been equivalent to a MOSTEK
MK4027.  Remember, MOSTEK was the industry leader in DRAMs in the mid-'70's.
This number predates my NEC data, but uPD416C would have been the 16K
version.

Dick

-----Original Message-----
From: Pete Turnbull &lt;pete(a)dunnington.u-net.com&gt;
To: Discussion re-collecting of classic computers
&lt;classiccmp(a)u.washington.edu&gt;
Date: Saturday, May 29, 1999 7:27 PM
Subject: Re: Vintage S-100 cards

...
 On May 29, 16:28, Don Maslin wrote:
  Subject: Vintage S-100 cards

  I just acquired a number of vintage (circa 1977) S-100 cards.  They are
  listed below:

     3)  Processor Technology 16k(?) RAM cards - one fully populated with
         NEC uPD414C chips, which I take to be a 2414 clone.  The other
         two seem to have all of the glue chips, but no RAM.  They are
         identified in silkscreen as ASSY NO.203000 and in etch as 16KRA. 
uPD414 is the equivalent of a 4027 DRAM (4096 x 1bits).  What's a 2414?
 Did you mean 2114, or 2147?

   Anybody care?  Anyone interested?  Any offers?

Yes, but shipping to the UK would be too expensive :-)

--

Pete Peter Turnbull
 Dept. of Computer Science
 University of York 