Click Here to visit our Sponsor
The History of Computing The Magazine Have Fun there ! Buy goodies to support us
  Mistake ? You have mr info ? Click here !Add Info     Search     Click here use the advanced search engine
Browse console museumBrowse pong museum


ZX Spectrum T-shirts!

see details
Ready prompt T-shirts!

see details
ZX81 T-shirts!

see details
Spiral program T-shirts!

see details
Arcade cherry T-shirts!

see details
Atari joystick T-shirts!

see details
Battle Zone T-shirts!

see details
Vectrex ship T-shirts!

see details
C64 maze generator T-shirts!

see details
Elite spaceship t-shirt T-shirts!

see details
Competition Pro Joystick T-shirts!

see details
Moon Lander T-shirts!

see details
Atari ST bombs T-shirts!

see details
Pak Pak Monster T-shirts!

see details
BASIC code T-shirts!

see details
Breakout T-shirts!

see details
Vector ship T-shirts!

see details
Pixel adventure T-shirts!

see details

C > COMMODORE  > PET / CBM 40xx   

PET / CBM 40xx

These computers are new versions of the PET series. The main improvement was the new ROM version (v4.0) which offered new possibilities such as direct disk operation commands (DLOAD, DSAVE, COPY, HEADER, etc.) or the ability to repeat cursor control characters by holding down keys. Late models also had a larger screen (12'') than the 2001 computers.

The disk drives were "Intelligent", which means that they were CPU driven (MOS 6502) and had internal RAM (4 KB) & ROM (16KB, which contained the DOS).

The 4032 and the 4016 were sold with an 80-column dot matrix printer (5x8 character matrix). This printer (4022) was an Epson printer with a Commodore name on it.

Dave Ridley reports:
CBM & PET 4000/8000 series - Brings back the memories! I used to fix these things, and boy did they have some classics. Regular problems were caused by the chip sockets going intermittant together with the molex power connectors burning out! Fix - remove chip squirt with RS Solvent Cleaner and stick them back. The external Disk units were connected by IEEE connectors. These disk drive units would fail, many a time I would open a unit up onsite(rather like opening the bonnet of a car) to find a pair of rectifier diodes that had got so hot they had actually melted themselves out of the board and fallen into the base.

Please consider donating your old computer / videogame system to or one of our partners from anywhere in the world (Europe, America, Asia, etc.).


to browse this website

Wednesday 12th August 2020
bacon man (USA)

Hi! I created a DIY 3D Printing project to build your own fully working Commodore PET Mini, just like this one! Take a look at it here:

Saturday 2nd February 2019
Loren (Spain)
Commodore PET Mini

I found one on the side of the road one day it worked why throw such a computer ? ... I threw my turn lol a moment of madness I think!

Thursday 30th October 2014
zozo (france)


NAME  PET / CBM 40xx
TYPE  Home Computer
YEAR  1980
BUILT IN LANGUAGE  Commodore Basic 4.0
KEYBOARD  QWERTY full-stroke keyboard
CPU  6502
RAM  16 or 32 KB
ROM  20 KB
TEXT MODES  40 columns x 25 lines, upgradable to 80 columns
COLORS  Monochrome
SOUND  Programmable piezo buzzer
SIZE / WEIGHT  Pet 4032 : 9'' x 17'' x 17'' / 45 lbs
I/O PORTS  IEEE 488, I/O ports (8), Tape (2)
PRICE  £775 (UK, 1984)

Software for this system!

year unknown company unknown

Please buy a t-shirt to support us !
Ready prompt
ZX Spectrum
Arcade cherry
Spiral program
Atari joystick
Battle Zone
Vectrex ship
C64 maze generator
Moon Lander
Competition Pro Joystick
Atari ST bombs
Elite spaceship t-shirt
Commodore 64 prompt
Pak Pak Monster
Pixel Deer
BASIC code
Shooting gallery
3D Cubes
Pixel adventure
Vector ship

Related Ebay auctions in real time - click to buy yours

see more Commodore  PET / CBM 40xx Ebay auctions !

Click here to go to the top of the page   
Contact us | members | about | donate old-systems | FAQ
OLD-COMPUTERS.COM is hosted by - NYI (New York Internet) -