3 May
2002
3 May
'02
9:16 p.m.
You're right about what they are but I think you may be making a mistake
attempting to use 'em when there are probably 64kx8, or at least 32kx8 srams
on a board lying in the closet. 64 of these babies would take a huge amount
of power, yet only amount to 8Kx8. One of the others, or maybe two, would use
1% of the power, and of the effort, and of the socket cost, yet do the whole
job.
If you really want to use 'em, find an application they fit. That'll be a
real classic and worth the trouble.
Thorough testing is something that ought to happen in a board for your PCB.
If you wire 'em on an ISA ww card, you can test 'em 8 at a time. Don't
solder
the sockets to anything, so you can use 'em for something useful later on. I
do this sort of thing all the time and find it easy to reuse ww sockets.
A memory test that doesn't let the occasional failure slip by will be an
interesting software challenge, too.
Dick
----- Original Message -----
From: "Tothwolf" <tothwolf(a)concentric.net>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, May 03, 2002 1:51 PM
Subject: 2102 SRAM test circuit?
I just came across a large number of loose 2102 chips
in a junkbox, and
wondered if anyone has a schematic of a test circuit for these. I'm not
sure how many of them there are yet, but they all appear to be from the
same batch; AM9102BPC/P2102A-4 7632QD [32nd week, 1976]. An couple
interesting facts I dug up on these chips is that the AM9102 was AMD's
first RAM product, and it was first produced in quantity in 1975.
I'm thinking these chips might be a good source of ram for a 6800 based
homebrew system, especially since I already have the chips and lots of
wirewrap (and patience)...
-Toth