Commodore PET 4032

Commodore CBM 4032-32N
The final version of what could be thought of as the "classic" PET was the PET 4000 series. This was essentially the later model 2000 series, but with a larger black-and-green monitor and a newer version of Commodore's BASIC programming language. By this point Commodore had noticed that many customers were buying the "low memory" versions of the machines and installing their own RAM chips, so the 4008 and 4016 had the sockets punched out of the motherboard.
The 4032 was a huge success in schools, where its tough all-metal construction and all-in-one design made it better able to stand up to the rigors of classroom use. Just as important in this role was the otherwise underutilized IEEE 488 port the PET included. Used wisely, the port could be used as a simple "network" and allowed printers and disk drives (at this point in time, very expensive devices) to be shared among all of the machines in the classroom

The PET 4032 was released three years after the original PET 2001. Although it has the same CPU running at the same speed, improved circuitry allows the 4032 to run substantially faster. Other improvements include more memory and a better keyboard.

4032 refers to 40 character display, with 32K RAM memory. The 4032 has four port to the outside world. An eight-bit parallel port, a port for a cassette recorder, a port that brings out the system bus, and an IEEE-488 port. Still in use today, the IEEE-488 bus is relatively complex, allowing up to 15 devices on the bus, but is mostly used for laboratory and scientific instruments.

Commodore also released the CBM 8032 at about the same time as the PET 4032. It is almost identical, except for having a 12" screen instead of the 9" screen, displaying 80 characters per line of text.

Why is the 4032 a 'PET', and the 8032 a 'CBM'? Commodore apparently had legal issues with the "PET" abbreviation, and had to change it to something else. They chose "CBM", for Commodore Business Machines. It seems that in Germany, in 1976, there was already a PET - a "Programm Entwicklung Terminal", or "Programmer Development Terminal", based on a Philips X 1150 data pooling system.

Model: PET 4032
Introduced: May 1980
Price: US $1295.
CPU: MOS 6502, 1MHz
RAM: 32K
Display: 40 X 25 text
 9" green screen
Ports: IEEE-488, Cassette
Peripherals: Cassette recorder
 External floppy drive

Specification from

Manufacturer: Commodore
Date: May 1980

Other Systems Related To Commodore PET 4032:

Item Manufacturer Date
Commodore PET 3016 Commodore 1977
Commodore PET 2001 Commodore June 1977
Commodore PET 2001-32 Commodore June 1978
Commodore PET 3032 Commodore 1979
Commodore PET CBM 3008 Commodore 1979
Commodore PET 8032SK Commodore 1979
Commodore PET 8096SK Commodore 1980
Commodore PET 4008 Commodore May 1980
Commodore P500 Commodore 1982
Commodore Pet 8032-32B Commodore 1982
Commodore 64 Commodore August 1982
Commodore SX-64 Commodore 1983
Commodore Pet 8296-D Commodore 1983
Commodore VIC-20 Commodore 14th May 1983
Commodore 16 Commodore 1984
Commodore Plus 4 Commodore 1984
Commodore C128 Commodore January 1985
Commodore 128D Commodore December 1985
Commodore Amiga 2000 or A2000 Commodore 1986
Commodore Amiga A500 Commodore 1987
Commodore 64 C Commodore March 1987
Commodore Amiga A500 Plus Commodore April 1987
Commodore C286-LT Portable Commodore 1990
Commodore Amiga 1500 Commodore 1990
Commodore C386SX-LT Commodore 1991
Commodore Amiga A600HD Commodore 1992
Commodore Amiga A600 Commodore March 1992
Commodore Amiga A1200 Commodore 21st October 1992
Commodore Amiga CD32 Commodore September 1993

This exhibit has a reference ID of CH8092. Please quote this reference ID in any communication with the Centre for Computing History.


Commodore PET 4032

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