Hi everyone,
I'm curious about identifing some chips.
I have was appears to be a memory board made by "EMM".
It also appears to be Q-bus, at least the power and
ground seem to be in the right places to be Q-bus.
Anyway, the board has 64 of these chips, and looking
at the interconnection between chips, they appear to
be arranged in 2 groups of 32. The chips are labeled:
SEMI
4200ACC
7733
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?
Thanks in advance,
--Doug
====================================================
Doug Coward dcoward_at_pressstart.com (work)
Sr. Software Eng. mranalog_at_home.com (home)
Press Start Inc.
http://www.pressstart.com
Sunnyvale,CA
Curator
Analog Computer Museum and History Center
http://www.best.com/~dcoward/analog
====================================================
Received on Mon Jul 12 1999 - 01:24:21 BST