Memory chip substitute?

[Allison]

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