24 Jul
2015
24 Jul
'15
2:13 a.m.
Can someone identify this S100 SRAM card? I can tell that it's a 16K SRAM
board made up of MM2114 chips. Virtual beer to the first person who
guesses where I found it.
--
David Griffith
dave at 661.org
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
24 Jul
24 Jul
2:16 a.m.
On Fri, 24 Jul 2015, dave at 661.org wrote:
Can someone identify this S100 SRAM card? I can tell
that it's a 16K SRAM
board made up of MM2114 chips. Virtual beer to the first person who guesses
where I found it.
Whoops! How about if I show you the picture?
https://www.flickr.com/photos/32548582 at N02/19969394361/
--
David Griffith
dave at 661.org
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
6:20 a.m.
On Fri, 24 Jul 2015, David Griffith wrote:
> Can someone identify this S100 SRAM card? I can tell that it's a
16K
> SRAM board made up of MM2114 chips. Virtual beer
to the first
person
who guesses
where I found it.
Whoops! How about if I show you the picture?
https://www.flickr.com/photos/32548582 at N02/19969394361/ 
7:25 a.m.
With all the switches, it looks like it has bank switching.
Dwight
Subject: RE: Mysterious S100 SRAM card
Date: Fri, 24 Jul 2015 06:20:50 -0700
From: rickb at bensene.com
To: cctalk at classiccmp.org
I'm pretty sure these are NorthStar RAM boards. My NorthStar Horizon
has two virtually identical boards in it, except the two LEDs at the top
edge are rectangular encapsulated ones rather than the conventionally
packaged LEDs shown in your photo.
-Rick Bensene
The Old Calculator Museum
http://oldcalculatormuseum.com
On Fri, 24 Jul 2015, David Griffith wrote:
> Can someone identify this S100 SRAM card? I can tell that it's a
16K
> SRAM board made up of MM2114 chips. Virtual
beer to the first
person
who
guesses where I found it.
Whoops! How about if I show you the picture?
https://www.flickr.com/photos/32548582 at N02/19969394361/ 
8:45 a.m.
I had 4 of them in my first 8080 computer. I believe they are SSM (Solid
State Music brand)
On 7/24/2015 2:16 AM, dave at 661.org wrote:
On Fri, 24 Jul 2015, dave at 661.org wrote:
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Can someone identify this S100 SRAM card? I can
tell that it's a 16K
SRAM board made up of MM2114 chips. Virtual beer to the first person
who guesses where I found it.
Whoops! How about if I show you the picture?
https://www.flickr.com/photos/32548582 at N02/19969394361/
9:02 a.m.
On 7/24/2015 2:16 AM, dave at 661.org wrote:
On Fri, 24 Jul 2015, dave at 661.org wrote:
It looks very close to a California Computer Systems board, possibly a
different rev.
http://www.s100computers.com/Hardware%20Folder/CCS/16K%20RAM/16K%20RAM.htm
Bob
--
Vintage computers and electronics
www.dvq.com
www.tekmuseum.com
www.decmuseum.org
Can someone identify this S100 SRAM card? I can
tell that it's a 16K
SRAM board made up of MM2114 chips. Virtual beer to the first person
who guesses where I found it.
Whoops! How about if I show you the picture?
https://www.flickr.com/photos/32548582 at N02/19969394361/
10:20 a.m.
On 2015-Jul-24, at 9:02 AM, Bob Rosenbloom wrote:
On 7/24/2015 2:16 AM, dave at 661.org wrote:
It's closer to the JTM 16K Static RAM, which must somehow have been related to CCS.
http://maben.homeip.net/static/S100/JTM/
Note that while the OP's board has two LEDs, and the board in the maben JTM photo
shows only one LED, the pads for a second LED are present on the maben board.
I have one too and went through this awhile ago - unidentified board, looking for manual,
found the CCS info and then the JTM info.
On Fri, 24 Jul 2015, dave at 661.org wrote:
It looks very close to a California Computer Systems board, possibly a different
rev.
http://www.s100computers.com/Hardware%20Folder/CCS/16K%20RAM/16K%20RAM.htm Can someone identify this S100 SRAM card? I can
tell that it's a 16K SRAM board made up of MM2114 chips. Virtual beer to the first
person who guesses where I found it.
Whoops! How about if I show you the picture?
https://www.flickr.com/photos/32548582 at N02/19969394361/
10:25 a.m.
On Fri, 24 Jul 2015, Brent Hilpert wrote:
On 2015-Jul-24, at 9:02 AM, Bob Rosenbloom wrote:
If you take a look at the manual for the CCS board on the
s100computers.com site, you'll find a Revision B diagram that appears to
be an exact match (page 39):
http://www.s100computers.com/Hardware%20Manuals/CCS/California%20Computer%2…
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://q7.neurotica.com/Oldtech/
On 7/24/2015 2:16 AM, dave at 661.org wrote:
It's closer to the JTM 16K Static RAM, which must somehow have been related to CCS.
http://maben.homeip.net/static/S100/JTM/ On Fri, 24 Jul 2015, dave at 661.org wrote:
It looks very close to a California Computer Systems board, possibly a different
rev.
http://www.s100computers.com/Hardware%20Folder/CCS/16K%20RAM/16K%20RAM.htm Can someone identify this S100 SRAM card? I can
tell that it's a 16K SRAM board made up of MM2114 chips. Virtual beer to the first
person who guesses where I found it.
Whoops! How about if I show you the picture?
https://www.flickr.com/photos/32548582 at N02/19969394361/
10:53 a.m.
On 2015-Jul-24, at 10:25 AM, Mike Loewen wrote:
On Fri, 24 Jul 2015, Brent Hilpert wrote:
Right, looks like the mismatch is actually between the photo on the S100computers site and
the manual on the same site,
that is, the manual matches the OP's board but the photo is a different rev.
On 2015-Jul-24, at 9:02 AM, Bob Rosenbloom
wrote:
If you take a look at the manual for the CCS board on the s100computers.com site,
you'll find a Revision B diagram that appears to be an exact match (page 39):
http://www.s100computers.com/Hardware%20Manuals/CCS/California%20Computer%2…
On 7/24/2015 2:16 AM, dave at 661.org wrote:
It's closer to the JTM 16K Static RAM, which must somehow have been related to CCS.
http://maben.homeip.net/static/S100/JTM/ On Fri, 24 Jul 2015, dave at 661.org wrote:
> Can someone identify this S100 SRAM card? I can tell that it's a 16K SRAM board
made up of MM2114 chips. Virtual beer to the first person who guesses where I found it.
Whoops! How about if I show you the picture?
https://www.flickr.com/photos/32548582 at N02/19969394361/
It looks very close to a California Computer Systems board, possibly a different
rev.
http://www.s100computers.com/Hardware%20Folder/CCS/16K%20RAM/16K%20RAM.htm 
3438
days inactive
3439
days old
10 comments
8 participants
participants (8)
-
bobalan＠sbcglobal.net -
dave＠661.org -
dkelvey＠hotmail.com -
hilpert＠cs.ubc.ca -
mloewen＠cpumagic.scol.pa.us -
rickb＠bensene.com -
wh.sudbrink＠verizon.net -
wulfman＠wulfman.com