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Calg5
Joined: 06 Apr 2010
Posts: 131
Location: Calgary Canada
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 Posted: Mon Jul 25, 2011 12:02 pm Post subject: BOARD ID |
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| Would someone on the forum recognize this board. Is it possibly a memory board? The black TI chip mounted on it is dated 1974. |
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Glory_Cloud
Joined: 24 Jul 2010
Posts: 730
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| Posted: Mon Jul 25, 2011 1:58 pm Post subject: |
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It's definitely an IBM board. It sure looks like
one of the 1M memory boards from the old
IBM 8580 PS/2 386 servers. |
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Calg5
Joined: 06 Apr 2010
Posts: 131
Location: Calgary Canada
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| Posted: Mon Jul 25, 2011 2:22 pm Post subject: |
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| Thanks Glory Cloud for the info. The timeline seems to fit with what I see here. I have several IBM components here in different boxes but it is like a jig-saw puzzle to identify it. |
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UMMR
Joined: 23 Aug 2007
Posts: 328
Location: Udine, ITALY
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| Posted: Tue Jul 26, 2011 3:00 am Post subject: |
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Hi,
your card is a very nice vintage IBM MOSFET RAM board. It belongs to the 1st generation of IBM MOSFET RAMs and it likely came from a System/3 Model 12 or 14 (1973/4). The "MST-style" chips marked IBM 7070 are the RAM modules, each containing two 512 bit chips mounted on the same substrate, thus the entire card capacity is 8 kbyte. The remaining chips (marked either IBM 7052 as in Your card or IBM 14) are interfaces and drivers. I know there are versions of the card with 1 kbit chips. IBM pioneered the field of MOS memories since 1966. Your card is one of the first MOS RAMs commercialized. My website has a page with some picture of vintage IBM memories: http://ummr.altervista.org/ibmtechviews.htm.
Paolo |
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UMMR
Joined: 23 Aug 2007
Posts: 328
Location: Udine, ITALY
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| Posted: Tue Jul 26, 2011 3:03 am Post subject: |
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| Calg5 wrote: | | I have several IBM components here in different boxes but it is like a jig-saw puzzle to identify it. |
Post some picture and I can try to identify Your mystery IBM cards! |
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Glory_Cloud
Joined: 24 Jul 2010
Posts: 730
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| Posted: Tue Jul 26, 2011 7:00 am Post subject: |
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Paulo, you sir are a wealth of information!  |
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Calg5
Joined: 06 Apr 2010
Posts: 131
Location: Calgary Canada
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| Posted: Tue Jul 26, 2011 8:30 am Post subject: |
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| Thanks a lot Paulo. I will keep digging and get some more pics out. |
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