Unknown huge IBM white DIPS

CPUShack · Posted: Sun Dec 29, 2013 6:14 pm Post subject: Unknown huge IBM white DIPS

No idea, look cool though

naked1300 · Joined: 26 Jul 2007 Posts: 837 Location: Austria,

nice pieces Smile

Robev · Joined: 10 Mar 2006 Posts: 3693 Location: New Zealand

Very nice and most likely manufactured by AMI though

yk · Joined: 17 Oct 2011 Posts: 539 Location: CN

beautiful, I have some too, maybe used as floppy disk controller

UMMR · Joined: 23 Aug 2007 Posts: 381 Location: Udine, ITALY

Hello
my guess is for a IBM 3790 Communication Controller card.
See here:
http://ummr.altervista.org/before_microprocessors.htm.
Happy 2014!
Paolo

naked1300 · Joined: 26 Jul 2007 Posts: 837 Location: Austria,

CPUShack · Posted: Thu Jan 02, 2014 1:12 pm Post subject:

If someone wants it, just make me an offer Smile

UMMR · Joined: 23 Aug 2007 Posts: 381 Location: Udine, ITALY

Hello,
in fact these chips are MSI FET gate arrays.
The logic complexity is about 70 NAND gates per chip, plus some minimal I/O circuitry. They are designed with a specific logic syntesis software developed by IBM in the late '60s and manufactured by IBM itself.
Another example of a IBM card made with these chips is the motherboard of the 3740 Data Entry System.
IBM logic arrays are usually contained in MST-styled aluminium packages.
Paolo

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