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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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 Posted: Wed Feb 02, 2022 12:17 pm Post subject: CPU Shack: Rare Rockwell PPS-4/1 CPUs |
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Here are some pretty uncommon ones. This is the single chip version of the Rockwell PPS-4 (Parallel Processing System 4-bit), the PPS-4/1 aka the MM78
They are a 4-bit PMOS CPU with over 60 instructions. They run at a blazing 40-120KHz
They were made in several versions with the MM78 having 2k of ROM (the largest and most expensive version)
These are NOS
18x Rockwell MM78 A7887-11 PPS-4/1 $15 each or a pair for $25
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stevejam
Joined: 30 Dec 2017
Posts: 803
Location: Metaluna aka Bellevue WA
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| Posted: Wed Feb 02, 2022 12:38 pm Post subject: |
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| One please! |
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xi11west
Joined: 07 Mar 2005
Posts: 1526
Location: Houston, TX
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| Posted: Wed Feb 02, 2022 1:10 pm Post subject: |
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| one please |
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Twinrocket
Joined: 04 Apr 2012
Posts: 558
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| Posted: Thu Feb 03, 2022 8:24 pm Post subject: |
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| a pair please |
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yk
Joined: 17 Oct 2011
Posts: 539
Location: CN
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| Posted: Fri Feb 04, 2022 5:02 am Post subject: |
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| a pair please |
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