Can anyone ID these SEMI chips?

From: Richard Erlacher <>
Date: Mon Jul 12 22:43:41 1999

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.


-----Original Message-----
From: Dave Dameron <>
To: Discussion re-collecting of classic computers
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.
Received on Mon Jul 12 1999 - 22:43:41 BST

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