Interesting thread.
Back in about the 1977 timeframe I built my first micro-computer. It
consisted of a Motorola evaluation board with a MC6800 uP and some add on
memory and other boards that I wire wrapped up at the time for TTY (an ASR35
which I still have) and Kansas City audio tape interfaces. Lots of fun back
then.
I also have a paper tape line editor for the system in paper tape binary
format and a paper tape assembler that consists of two rolls of paper tape
for pass1 and pass2. Pass1 would input the source code and output a paper
tape pass file. Pass two ate the pass file and output an absolute binary
loader
file. Paper tape all over the room!!
Installed in the system is a Godbout EconoRam II memory board 8K x 8 that I
built from a kit. I also have at least one (maybe two) kits for these
boards still sealed in factory boxes that I never got around to building.
(Ambitious plans to take the system to 24K bytes of RAM!!!, no follow
through). The one that I built is fully socketed and has provisions for two
7805 regulators.
Each of these boards sports 64 each National Semiconductor MM2102AN-4L (8K x
1?) Static? RAM chips. Everything seems to bear a 1977 date code.
Given todays technology, these boards are of absolutely no use to me.
Anybody want some obsolete parts?? Make me an offer I can't refuse.
Bob Smith
--- Avoid computer viruses, Practice safe hex ---
-- Specializing in small, cost effective
embedded control systems --
http://www.smithmachineworks.com/embedprod.html
Robert L. (Bob) Smith
Smith Machine Works, Inc.
9900 Lumlay Road
Richmond, VA 23236 804/745-1065
[EMAIL PROTECTED]
----- Original Message -----
To: "Multiple recipients of list CHIPDIR-L" <[EMAIL PROTECTED]>
Sent: Wednesday, February 26, 2003 10:10 AM
> At 02:38 AM 2/26/03 -0800, Jaap wrote:
> >At 2003-02-25 17:18 -0800, Joe wrote:
> >>Can anyone tell me what this is? It's a 16 pin SSI IC and it's date
coded 8327. My guess is that it's an early 64k x 1 DRAM. Google didn't get
any hits and chip directory keeps popping up a "404 Not Found" error.
> >
> >The Intel 2101 was an 1K*1 SRAM, so the 2164 is probably
> >a 64K*1 SRAM.
>
> Except that the intel 2104, 2107 and 2116 are all DRAMs (4k, 4k and
16k respectively). AFIK Intel never made any "big" DRAMs.
>
> >
> >'20' probably means that it's access time is 200 ns.
> >
> >Around 1983 seems right for this type of density.
> >My Tandy/RadioShack TRS-80 of 1978/79 used 6 of
> >the 2101's as video screen memory. (We had to add
> >an extra one ourselves to get lower case characters.
>
> That's interesting. Which model TRS-80? I was looking for some 2101s a
while back but couldn't find any.
>
> Thanks,
> Joe
>
> >;-).
> >
> >Greetings,
> >Jaap
> >
> >--
> >Author: Jaap van Ganswijk
> > INET: [EMAIL PROTECTED]
> >
> >Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> >San Diego, California -- Mailing list and web hosting services
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> >to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
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> >also send the HELP command for other information (like subscribing).
> >
> >
>
>
> --
> Author: Joe
> INET: [EMAIL PROTECTED]
>
> Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> San Diego, California -- Mailing list and web hosting services
> ---------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
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>
--
Author: Robert Smith
INET: [EMAIL PROTECTED]
Fat City Network Services -- 858-538-5051 http://www.fatcity.com
San Diego, California -- Mailing list and web hosting services
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