Memory chip substitute? - test-drb@ccmp.vtda.org

15 Aug 2005

I'll have to dig, I may still have a few.  They were discontinued by NEC bad around
1980.

Allison

...

Subject: RE: Memory chip substitute?
   From: "Richard A. Cini" <rcini at optonline.net>
   Date: Mon, 15 Aug 2005 13:51:05 -0400
     To: "'General Discussion: On-Topic and Off-Topic Posts'"	<cctalk
at classiccmp.org>

The board is a Solid State Music MB7 16k board. I have (at least) one bad
chip on it.

-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Allison
Sent: Monday, August 15, 2005 1:34 PM
To: cctalk at classiccmp.org
Subject: Re: Memory chip substitute?

Subject: Memory chip substitute?
   From: "Richard A. Cini" <rcini at optonline.net>
   Date: Mon, 15 Aug 2005 11:12:20 -0400
     To: CCTalk <cctalk at classiccmp.org>

All:

	I'm repairing a few S100 memory boards and I'm having trouble crossing 
 a memory chip on the SSM MB7 16k board. The chip
is an NEC UPD410D. I 
have D5101LC1's "in stock". Are these equivalent? 
No, not even close.

UPD410 is a fairly fast semistatic 4kx1.  5101 is cmos 256x4.

What memory board has a upd410 on it?  Very unusual.

Allison 