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drswizz
Joined: 10 Mar 2011
Posts: 42
Location: Sweden
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UMMR
Joined: 23 Aug 2007
Posts: 381
Location: Udine, ITALY
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 Posted: Sat Mar 12, 2011 5:02 pm Post subject: |
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Hello,
in all Your pictures I see IBM-made chips (the components with the PGA-like aluminium package) and ordinary TTLs with IBM markings.
The IBM chips belongs to the large family of IBM components known as "MST", or Monolythic System Technology: in fact, they are bipolar and MOS gate arrays. More precisely this kind of IBM integrated circuits (LSI gate arrays of multi-input NAND and NOR logic gates) are known as the "Dutchess" logic. They have been used in hundreds, literally, IBM products - from minicomputers to modems, printers etc. The identification of the exact function of such a chip is very difficult (the markings are customized and specific for the board and the machine). IMHO the socketed chips are mostly ROMs. There are several discussions online about the meaning of the numbers after "IBM" (e.g. IBM 9314, IBM 52 and so on). The prevalent opinion is that these numbers are an identification code for the chip's fabrication plant.
The DIP chips are simply ordinary TTL (Series 74) with IBM Product Numbers.
MST was the first generation of true monolithic ICs made by IBM, since the previous SLT, used in the IBM System/360 family, is a kind of hybrid technology. MST was in use from 1970 to 1987/8. |
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Glory_Cloud
Joined: 24 Jul 2010
Posts: 2942
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| Posted: Sat Mar 12, 2011 8:00 pm Post subject: |
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Wow - a trip down memory lane for me.
These boards are out of an old IBM 5225 printer
that worked on the IBM System 36 midrange systems.
The board in picture 1 is the comm interface board
and the board in the second picture is the M2 wire latch card.
The IBM 5225 printer is shown in this old IBM marketing material.
It's the printer in the front right corner with the humongous sheet feeder
on top.
http://www-03.ibm.com/ibm/history/exhibits/rochester/rochester_4018.html
I can't tell you much about the individual chips though.  |
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drswizz
Joined: 10 Mar 2011
Posts: 42
Location: Sweden
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isa-d
Joined: 16 Aug 2006
Posts: 2984
Location: Italy
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| Posted: Sun Mar 13, 2011 11:56 am Post subject: |
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From my 1978 IC Master DG506A are made by Siliconix and are 16 channel Multiplexers
I'm not sure but at a first watch seem to be boards out of some Tectronix equipment |
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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soemtron220
Joined: 16 Sep 2008
Posts: 3
Location: England
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| Posted: Fri Sep 21, 2012 9:48 am Post subject: |
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Hi,
They are DEC "FlipChip" boards introduced in 1964 with the DEC PDP-7 computer.
The boards hould have a number stamped in the handle front, the white (W series) boards will be mostly I/O and the red "R or S series" will be descreet logic functions. see the DEC publication "1967 Logic handbook" link on the page - http://www.soemtron.org/pdp7flipchips.html - which explains the logic functions in each series, along with a basic circuit for each board.
_________________
Mike
mike@soemtron.org
www.soemtron.org |
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soemtron220
Joined: 16 Sep 2008
Posts: 3
Location: England
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| Posted: Fri Sep 21, 2012 11:09 am Post subject: |
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Hi,
In photo "boards016", the centre left board is a W707 Teletype Transmitter, and in the top right corner is a W706 Teletype Receiver, both board costing $150 in 1967.
The top left and centre right boards are both the same and I thought they might be the "Teletype interfacer" W708 but that does not appear to be the case, I beleive they are both W103, listed as a "PDP-8 Device Selector".
Circuits and data sheets for all thre modules are to be found at -
http://dustyoldcomputers.com/pdp-common/reference/drawings/modules/ - on the W series link.
_________________
Mike
mike@soemtron.org
www.soemtron.org |
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