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PPS-4 - Rockwell International
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Rockwell PPS-4
Rockwell PPS4 in Sharp PC-1001.jpg
Rockwell PPS-4 found in the PC-1001 programmable calculator. PPS-4 (part 10660) on the upper-right corner along with the 10706 clock generator, GP I/O 10696, ROM (A05xx), RAM (10432), and a 7400 series 74154 decoder.
Developer Rockwell International
Manufacturer Rockwell International
Production August, 1972-1981
Architecture 4-bit words, 8-bit instruction
Word size 4 bit
0.5 octets
1 nibbles
Technology pMOS
Clock 40 kHz-256 kHz
Package QIL42

The PPS-4 (Parallel Processing System - 4-bit word) was a family of 4-bit microprocessor chips designed by Rockwell International and introduce in 3rd quarter of 1972.

The original PPS-4 chipset was designed to provide complete functionality in three chips - CPU, program memory, and a clock generator. A later version known as the PPS-4/2 ("/2" denoting a two-chip system) eliminated the external clock generator chip by incorporating it internally. A third variation known as the PPS-4/1 ("/1" being a single-chip microcomputer) was actually a microcontroller, including the program memory internally.

History[edit]

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Members[edit]

Part Function Description
10660 CPU Original "PPS-4" CPU
11660 CPU "PPS-4/2" CPU
12660 CPU Same as 10660
10432 RAM
10686 General purpose I/O
10696 General purpose I/O
10706 clock
10731 com data interface
10738 Bus I/O
10736 dot matrix printer controller
10788 keyboard/display controller
10789 printer controller
10815 keyboard/printer controller
10930 serial data controller
11049 interval timer
15380 dot matrix printer controller
A05xx ROM
A07xx ROM
A08xx ROM
A17xx ROM
A21xx ROM
A22xx ROM
A23xx ROM
A52xx ROM

2nd source[edit]

National semiconductor later became a second source for the PPS-4.

Applications[edit]

While not as known as the other chips like the MCS-4, the PPS-4 certainly never received as much mainstream exposure. Nevertheless, it did find its way into many industrial and consumer products such as toys, desktop calculators, games, and other electronic appliances.

Design[edit]

New text document.svg This section is empty; you can help add the missing info by editing this page.

Instruction set[edit]

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Documents[edit]

designerRockwell International +
full page namerockwell international/pps-4 +
instance ofintegrated circuit family +
manufacturerRockwell International +
packageQIL42 +
technologypMOS +
word size4 bit (0.5 octets, 1 nibbles) +