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tlccomp
Joined: 11 May 2006
Posts: 1212
Location: Southeast Wisconsin, USA
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 Posted: Sun Jul 03, 2011 10:36 am Post subject: 1971 - 1101 Memory IC |
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Got these the other day. Trying to ID the manufacturer.
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kosmokrator
Joined: 03 Jul 2008
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Location: Athens-GR
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| Posted: Sun Jul 03, 2011 10:51 am Post subject: |
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!!!! so earlyyyyy But sure is 1101mem chip ???
very nice if is !!! |
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tlccomp
Joined: 11 May 2006
Posts: 1212
Location: Southeast Wisconsin, USA
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| Posted: Sun Jul 03, 2011 11:15 am Post subject: |
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| kosmokrator wrote: | !!!! so earlyyyyy But sure is 1101mem chip ???
very nice if is !!! |
Reasonably sure. It "fits" along with the other items that I received in the same group of IC's.
I suspect the logo may be a from a company named CMI (Computer Microtechnology, Inc.). I found a reference in a technical paper regarding LSI memories.
"This circuit is used in most of the 256-bit decoded MOS RAM'S manufactured by Intel, lntersil and Computer Microtechnology." And, Computer Microtechnology Inc. was involved with AMS
(Advanced Memory Systems) and was eventually bought out by AMS in 1973.
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Elar
Joined: 16 Jul 2003
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Location: Tallinn, Estonia
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kosmokrator
Joined: 03 Jul 2008
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Location: Athens-GR
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| Posted: Sun Jul 03, 2011 12:29 pm Post subject: |
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there was an same 1101 sample chip.....
i think if u have some more of this u must sacrafise one ..to see if inside is really ram or some ttl logic of the early 70's...
if this is real ram..is very very uniq-important find....
I love mysteries...like theese.... |
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tlccomp
Joined: 11 May 2006
Posts: 1212
Location: Southeast Wisconsin, USA
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| Posted: Sun Jul 03, 2011 12:35 pm Post subject: |
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Thanks for the reference. I think the logo could be CMI. Chiefish's picture is more clear. I have others looking into this as well.
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tlccomp
Joined: 11 May 2006
Posts: 1212
Location: Southeast Wisconsin, USA
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| Posted: Sun Jul 03, 2011 12:37 pm Post subject: |
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| kosmokrator wrote: | there was an same 1101 sample chip.....
i think if u have some more of this u must sacrafise one ..to see if inside is really ram or some ttl logic of the early 70's...
if this is real ram..is very very uniq-important find....
I love mysteries...like theese.... |
Maybe I'll have to do that. Have one here that has bad corrosion from the black foam it was stored in.
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kosmokrator
Joined: 03 Jul 2008
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| Posted: Sun Jul 03, 2011 12:41 pm Post subject: |
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So..i think worth to see inside...
keep us informed
thnx |
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CPUShack
Joined: 16 Jun 2003
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Location: State of Jefferson, USA
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kosmokrator
Joined: 03 Jul 2008
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Location: Athens-GR
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| Posted: Sun Jul 03, 2011 12:49 pm Post subject: |
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yes even witha nicemagnify glass or a poor microscpe..... the intergration in 1971 wiil be rediculus for the today standards  |
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tlccomp
Joined: 11 May 2006
Posts: 1212
Location: Southeast Wisconsin, USA
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| Posted: Sun Jul 03, 2011 1:00 pm Post subject: |
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| CPUShack wrote: | | should be made on 10micron so should not be too hard to see die features and markings. |
Any suggestions as to the best way to remove the lid?
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Elar
Joined: 16 Jul 2003
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Location: Tallinn, Estonia
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| Posted: Sun Jul 03, 2011 1:19 pm Post subject: |
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| tlccomp wrote: | | CPUShack wrote: | | should be made on 10micron so should not be too hard to see die features and markings. |
Any suggestions as to the best way to remove the lid? |
Our member naked1300 shows how:
http://www.cpu-galaxy.at/Article/opening_die_core.htm |
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kosmokrator
Joined: 03 Jul 2008
Posts: 4085
Location: Athens-GR
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| Posted: Sun Jul 03, 2011 1:25 pm Post subject: |
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i think a well cutting razor will do the job without mutant the die core from the heavy temp...is nt big chip like 486..ect......
try something soft......evena cuting tool for wires do the job i have open 10's ic like this with this way... |
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CPUShack
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tlccomp
Joined: 11 May 2006
Posts: 1212
Location: Southeast Wisconsin, USA
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| Posted: Sun Jul 03, 2011 1:50 pm Post subject: |
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Thank you for the link Elar. First attempt... may need to borrow a better camera.
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