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dstraney
Joined: 15 Oct 2023
Posts: 113
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 Posted: Tue Mar 11, 2025 5:21 pm Post subject: IBM mainframe board - sold |
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Sold Mystery IBM mainframe board (likely a RAM controller of some kind), with all kinds of weird custom stuff on it, and IBM's distinctive grid-of-vias layout pattern. There's a big ceramic ASIC with a gold lid, and 34x pairs of memory chips stacked on top of each other, in ceramic DIP packages.
$200, with free shipping to AVICC. I take PayPal (friends & family) or ChipPay. Let me know if you want more photos.
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Last edited by dstraney on Fri Mar 21, 2025 11:04 am; edited 2 times in total |
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Glory_Cloud
Joined: 24 Jul 2010
Posts: 2942
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| Posted: Tue Mar 11, 2025 7:19 pm Post subject: |
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I think that this one is a memory card for an IBM 4341 mainframe.  |
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Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
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| Posted: Wed Mar 12, 2025 3:37 am Post subject: |
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Described as:
8493255 4116 32K X 1 DRAM (?!?)
Maybe two stacked 16K DRAM's packaged in DIP18
Also, 4429693 74S04J HEX INVERTER |
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DM8800er
Joined: 28 Jun 2012
Posts: 279
Location: California
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| Posted: Wed Mar 12, 2025 6:34 am Post subject: 4341 boards |
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definitely from a 4341 mainframe
here are some other versions |
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dstraney
Joined: 15 Oct 2023
Posts: 113
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Glory_Cloud
Joined: 24 Jul 2010
Posts: 2942
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| Posted: Wed Mar 12, 2025 9:58 am Post subject: |
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I used to sell IBM mainframes including the IBM 4331 / 4341 / 4361 / 4381
and also some of the System/370's like the 138 / 148 / 158 / 168. Plus all
the peripherals that attached to them. Big iron days.
Here is my 4341 board.  |
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DM8800er
Joined: 28 Jun 2012
Posts: 279
Location: California
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| Posted: Wed Mar 12, 2025 7:23 pm Post subject: 4341b |
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| I have some similar ones |
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Chriscosmo12
Joined: 14 May 2023
Posts: 426
Location: Texas, USA
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| Posted: Wed Mar 12, 2025 9:08 pm Post subject: |
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Always loved the look of those triple-chip boards.
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dstraney
Joined: 15 Oct 2023
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