Re: N3101 RAM for Missile Command

From: Rodger Boots <rlboots_at_cedar-rapids.net>
Date: Sat Jan 31 2004 - 04:28:50 EST

The N3101 is a Signetics number (datasheet here) that directly crosses to a 74S289 (datasheet here), and for completeness I'm including the Intel 3101 datasheet here.

So far we have chips that are all open collector output and are obsolete.  That being said, I see no reason why you need open collector outputs, it's probably just what was available when they designed the game.  A 74S189 (Jameco has them here) should work fine.

The 3101 is NOT compatible with the 5101 or 2102 or anything else.  It is a very fast, very small RAM.  64 bits arranged as 16 x 4.


MyPearl wrote:

Hello group,

I found that the COLOR RAM (at L7) of my missile command has litterary
cracked open. Weird thing is it, still works, but becomes unstable now and
then and triggers the Watchdog.

The partnumber on the chip is 'N3101'

I cannot find a datasheet for this part, nor a source, or a cross to a
replacement on the web...

Does anyone know where I could get this RAM, or equivalent?

Hope someone knows...

Thanks

Mendel Pearl
---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com


  

--------------------------------------------------------------------------- ** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org ** Please direct other questions, comments, or problems to chris@westnet.com Received on Sat Jan 31 04:29:33 2004