12 Jul
1999
12 Jul
'99
10:43 p.m.
I had one in my possession back in the days when it might have been of use,
but since it wasn't at that moment, I didn't pursue it. It's not the SRAM I
wanted that week, but I remember it was an odd DRAM or shift register or
some such. 22 pins was not a popular package.
Dick
-----Original Message-----
From: Dave Dameron <ddameron(a)earthlink.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, July 12, 1999 7:25 PM
Subject: Re: Can anyone ID these SEMI chips?
At 11:24 PM 7/11/99 -0700, Doug wrote:
Hi everyone,
These are 22 pin chips, made in 1977, but I
can't
seem to find any chip manufacturer named SEMI or
any reference to this 4200 number.
Can anyone identify these chip?
I don't know that part number (a 4k dynamic ram like Intel 2107??), but the
company was "EMM Semi", a part of
Electronic Memories & Magnetics. They were in Phoenix, AZ.
-Dave