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| | Rockwell PPS-4
General
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General Information
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The PPS-4 is one of only four microprocessors introduced
before 1974 (the others being Intel’s 4004 and 8008, and National
Semi’s IMP-16). The PPS-4 was the only competitor to Intel 4004. And
like the 4004 was originally developed for calculator applications. The
PPS-4 chip technology was metal gate versus the 4004’s silicon gate.
Although using a slower technology, the PPS-4 implemented a higher degree
of parallelism than the Intel 4004. Its performance was comparable to the
Intel 4004, according the 4004’s designer Federico Faggin.
The original PPS-4, 12660, was introduced in the third quarter of 1972.
The PPS-4 had two follow-on versions PPS-4/2 (third quarter 1975) and
PPS-4/1 (second quarter 1976). Like the 4004, the PPS-4 was used in
computing, control and gaming applications. The PPS-4 can be found in
several of Gottlieb’s pinball machines.
The PPS-4 uses the QUIP (Quad-In-Line) package found in Rockwell’s
later 6511. The QUIP package has the alternating leads to reduce package
size. While the 4004 was bottlenecked with 16 leads, the PPS-4 had 42.
"The original part number of the PPS-4 was the 10660. I selected
the part
number very carefully. The part number appears on every mask layer, but I
"accidentally" left the metal off the top of the first zero.
Under a
microscope the part number looks like "lubb0" which was as close
to getting
my name on the chip as possible." Ray Lubow, 12-17-02 |
Production
|
PPS-4, 3rd Quarter 1972; PPS-4/1 2nd Quarter
1976; PPS-4/2 3rd Quarter 1975 |
| Designers |
Ray Lubow, Jim Slager |
Architecture
| Type |
Data Word |
Address Space |
Clock |
Instruct- ions |
Assists |
Reg's GP |
Reg's Math |
Reg's Index |
IO Ports |
Stack |
Interrupts |
Memory |
| CPU,
PMOS |
4-bit |
4K |
256Khz, /2 = 199Khz |
|
NA |
1 |
1 |
0 |
|
2x12bits |
1 Level |
|
Packages
|
Chip Name |
Package
|
On-Chip Identification |
Picture |
General Comments
|
| PPS-4 |
|
10660 |
Picture NA |
|
| PPS-4 |
Black plastic, 42 lead, QUIP |
12660EA |
 |
|
| PPS-4/1 |
Black plastic, 42 lead, QUIP |
76xx or 77xx |
Picture NA |
|
| PPS-4/2 |
White ceramic, 42 lead, QUIP |
11600?? |
Picture NA |
|
| PPS-4/2 |
Black plastic, 42 lead, QUIP |
11600EF |
 |
This PPS-4/2 is on a Gottieb motherboard |
Related Chips
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Related Chips
|
None |
|
Second Sources |
None |
| Support Chips |
10738 (Bus Interface Circuit), 10706 (Clock
Generator), 10788 (General Purpose Keyboard and Display Control), 10696
(General Purpose I/O), 11049 (Interval Timer), 10815 (Keyboard/Printer
Controller), 10789 (Printer Controller), 10736,15380 (Victor Dot Matrix
Printer Controller), 10930 (Serial Data Controller), 10371
(Telecommunications Data Interface) |
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