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6,654 pages: 1,289 machines, 702 software, 460 companies, 64 history, 17 articles, 59 fun.
4,336 media files so far; references to files not downloaded yet are left out.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
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---
title: Commodore CBM 80xx
categories:
- Computers
types:
- Professional Computer
origins:
- U.S.A.
years:
- '1981'
cpus:
- '6502'
params:
name: CBM 80xx
image: /media/museum/photos/commodore_cbm-8032_1.jpg
company: /companies/commodore
company_name: Commodore
specs:
- label: NAME
value: CBM 80xx
- label: MANUFACTURER
value: Commodore
- label: TYPE
value: Professional Computer
- label: ORIGIN
value: U.S.A.
- label: YEAR
value: '1981'
- label: BUILT IN LANGUAGE
value: Commodore Basic (v4.0)
- label: KEYBOARD
value: Full-stroke keyboard (''business keyboard'')
- label: CPU
value: '6502'
- label: SPEED
value: 1 MHz
- label: RAM
value: 32, 64 or 96 KB
- label: ROM
value: 16 KB
- label: TEXT MODES
value: 80 columns x 25 lines
- label: GRAPHIC MODES
value: none
- label: COLORS
value: monochrome
- label: SIZE / WEIGHT
value: Heavy !
- label: I/O PORTS
value: IEEE 488, Cassette
- label: BUILT IN MEDIA
value: None
- label: OS
value: ROM Based (ROM v4.0)
- label: POWER SUPPLY
value: PSU built-in
- label: PRICE
value: Unknown
tabs:
- photos
- hardware
- emulators
- links
- docs
photos:
- title: CBM 8032
subtitle: ''
text: ''
image: /media/museum/photos/commodore_cbm8032_2.jpg
- title: 8032 SK
subtitle: ''
text: The CBM 8032-SK was also sold in a European version called **PET 200**. Character generator ROM and keyboard were modified to fit the system to various European languages.
image: /media/museum/photos/commodore_8032sk_1.jpg
- title: CBM 8296
subtitle: ''
text: |-
This version holds 128 KB of RAM
Thanks to **Roman von Wartburg** from Germany
image: /media/museum/photos/commodore_8296_system_1.jpg
- title: THE BOX
subtitle: ''
text: ''
image: /media/museum/photos/commodore_8296_box.jpg
- title: HAMSTER CAGE
subtitle: ''
text: |-
This monitor found a new job as a hamster cage in the department's mechanical workshop of the University of Amsterdam!
Thanks to the [University of Amsterdam](http://www.science.uva.nl/faculteit/museum/) for this picture.
image: /media/museum/photos/commodore_pet_hamsters.jpg
hardware:
- title: CLOCK/CALENDAR MODULE
subtitle: ''
text: Could be connected to any PET/CBM user port. Clock and calendar were battery backed up.
image: /media/museum/hardware/commodore_pet_clockmodule_1.jpg
- title: EPROM PROGRAMMER
subtitle: ''
text: Could burn 2716 and 2732 Eprom chips.
image: /media/museum/hardware/commodore_pet_epromprog_1.jpg
- title: TNW-2000
subtitle: IEEE-488 to Serial converter
text: Thanks to **Pascal Rollin**
image: /media/museum/hardware/commodore_pet_tnw2000_1.jpg
- title: DUAL DISK-DRIVES
subtitle: Model 2040
text: This dual 5.25" floppy disk is single sided, double density and has a storage capacity of 170 Kb per disk, or 360k total. It's connected to the computer through an IEEE-488 interface and uses CBM DOS 1.0.
image: /media/museum/hardware/commodore_cbm2040-dualdisks_1.jpg
- title: 8050 DUAL DISK-DRIVE
subtitle: ''
text: |-
CBM PET Model 8050 Dual disk drive. It uses a 100 TPI single headed drive with a storage capacity of 533,248 bytes per drive. Each 8050 disk has 77 tracks, and is read/write compatible with the model 8250 disk. This compatibility is limited to one side of the diskette.
It can be used with Commodore Series 2001, Series 3000, Series 4000 and Series 8000. It uses an IEEE-488 interface.
image: /media/museum/hardware/commodore_cbm_8050_diskdrives.jpg
- title: 8250-LP DUAL DRIVE UNIT
subtitle: ''
text: The 8250-LP (for Low Profile) uses dual half-size double-side, double-density 1 MB capacity floppy drives. The main logic board is entirely different from the full-size 8250. It uses two 6502 processors!
image: /media/museum/hardware/commodore_700_8250fddunit_1.jpg
- title: 9090 HARD-DISK
subtitle: ''
text: This is a single drive non-removeable Winchester technology storage device. It features 3 platters with recording surfaces on both sides and provides 7.5 million characters of storage. A single random access file may occupy the entire capacity. It has an IEEE interface connector and a "slow blow" fuse on the back.
image: /media/museum/hardware/commodore_cbm_9090_harddisk.jpg
- title: 8023P COMMODORE TRACTOR PRINTER
subtitle: ''
text: ''
image: /media/museum/hardware/commodore_printer_8032p.jpg
emulators:
- title: Versatile Commodore 8-bit Emulator (VICE)
url: http://www.6502.org/users/andre/index.html
platform: Windows
text: ''
links:
- title: Larry's PET/CBM Pages
url: http://www.portcommodore.com/petindex.php?path=main-cbmidx
text: Excellent source of information for PET/CBM computers
- title: PET index
url: http://www.6502.org/users/andre/petindex/index.html
text: Some useful info here about PET computers
- title: The Commodore CBM-II page
url: http://ca.geocities.com/SJGRAY@ROGERS.COM/CBM/
text: All things CBM-II
- title: THE Independent Commodore Library
url: http://freespace.virgin.net/ken.ross1/
text: All sorts of programs here, text files covering a wide range of subjects
- title: TPUG - Toronto PET Users Group Inc.
url: http://www.tpug.ca/
text: The Commodore PET Users Group, founded in 1979 ! (seems offline, mail us their new address if you find it)
- title: www.commodore.ca
url: http://www.commodore.ca/products/pet/commodore_pet.htm
text: Excellent site with a lot of info about Commodore computers including dedicated PET pages
- title: Web Wiz CAPTCHA
url: http://www.webwizcaptcha.com
text: Discussion about Commodore micros
docs:
- title: COMMODORE BASIC VERSION 4.0 - USER'S REFERENCE MANUAL
url: http://www.commodore.ca/manuals/default.htm
cover: /media/museum/docs/couvs/commodore_basic_4_users_reference%20manual.jpg
text: |-
[**COMMODORE BASIC VERSION 4.0 - USER'S REFERENCE MANUAL**](http://www.commodore.ca/manuals/default.htm)written by Commodore
 compiled/archived by www.commodore.ca\
 type of document : PDF\
 source : [www.commodore.ca](http://www.commodore.ca)
- title: COMMODORE PET MACHINE LANGUAGE MONITOR
url: http://www.commodore.ca/manuals/default.htm
cover: /media/museum/docs/couvs/pet_machine_language_monitor.jpg
text: |-
[**COMMODORE PET MACHINE LANGUAGE MONITOR**](http://www.commodore.ca/manuals/default.htm)written by Commodore
 compiled/archived by www.commodore.ca\
 type of document : PDF\
 source : [www.commodore.ca](http://www.commodore.ca)
comments:
- author: Peter Singleton (UK)
date: Saturday 17th December 2016
text: We used these very seriously at a insurance company, Albany Life, where we had these as standard for word-processing (using WordCraft) across the company at about 20 different branches around the UK. Used BASIC programs as well as Visicalc to do a lot of finanical modelling, so much so that we got Wordcraft to develop a micro-mainframe link so that we could transfer data from mainframe into our financial modelling systems. Was much quicker $ more cost-effective than trying to get things done through mainframe systems. Eventually moved to PCs, but loved teh simplicity and flexibility of the Commodore PETs
- author: Jim Amos (Denver, CO USA)
date: Tuesday 5th May 2015
text: Granville Kirkup in England created a camera repair shop application on the 8032, using the dual 500K floppy drive unit for storage. I bought a system from him and used it for many years to run my shop. It would hold data for about 2,000 repairs. There was nothing like it at the time. He also did a simple payroll tax program. The Leica camera company in Germany developed a camera shutter speed tester using an 80XX as the output device.
- author: Jonno (Yorkshire, England)
date: Friday 22nd October 2010
text: I learned to program on one of these in school when I was 15 and I loved it. Only had a tape deck though so very slow. My friend had a BIG program he wrote and it would take most of a lesson to load it! Because of this lots of people preferred the timeshare teleprinter terminal linked to our local council''s mainframe as it had instant save/load times.
- author: Ernie Jacob, Jr. (Switzerland)
date: Thursday 7th October 2010
text: |-
I used a CBM 8032 combined with 2 px. 8296 FDD Floppy Disk Stations to manage my 20''000+ Customer Database and it worked, at least, most of the time, quite well.
From my point of view, the 8032 was the first real Consumer Computer packed into a very strong case and looking like a real Computer...
Ernie
- author: Dave Lea (UK)
date: Wednesday 1st September 2010
text: These were an absolute nightmare to work on, when spares started to dry up, you could only tackle on with an ociliscope, an avo meter and soldering iron along with your box of bits! Good memories though, but it might frighten todays techies a bit
- author: Wulf
date: Monday 27th April 2009
text: In contrast to Ben''s experience, I think to remember that it actually was possible to read C64 tapes on a Pet. Our school had a room full of Pets, and a friend and me used to write BASIC programs at home with a C64 and then load them into the Pet the next day. You needed a series of Pokes for the tape to load properly though.
- author: Peter Husrt (UK)
date: Friday 21st March 2008
text: |-
I used Commodore PET's at college in the early eighties. I remeber how fast they seemed compared to my ZX81 at home and the robustness, no more gentle typing in case the rampack wobbled!
I was always impressed at the design and the way the case opened like a car bonnet to gain access to the motherboard.
- author: Skel (Oakville, Ontario, Canada)
date: Tuesday 17th October 2006
text: Take a close look at the C-64's User Manual for the 1541 disk drive. As was mentioned in the PET profile, the Tapes from the 80xx could be read by the C-64. Likewise, the 1541 disk drive used the Pet 40xx & 80xx disk format system allowing it to read the old PET formatted diskettes BUT NOT WRITE to them. It wasn't just tapes that could be read, but diskettes as well. Indeed, several diskette programming instructions in the Commodore 64 Basic V2 such as the save procedure "s0:" and "Duplicate" (completely useless on the 1541's single disk system) were hold-overs from as far back as the first PET disk drive systems.
- author: Rich (Salt Lake City, UT, USA)
date: Sunday 12th December 2004
text: I have one of these, but it doesn't power up. Any suggestions on how to diagnose/repair the problem? The fuse is fine, so it seems like it must be the power supply. Thanks!
- author: stefan (sweden)
date: Monday 14th October 2002
text: |-
I have one of these.Buyer mail me.\
stefan
related:
- /museum/commodore-cbm-500-600-series
- /museum/commodore-cbm-700-series
- /museum/commodore-pet-200
- /museum/commodore-pet-2001
- /museum/commodore-pet-30xx
- /museum/commodore-pet-cbm-40xx
- /museum/commodore-superpet
oc_id: 105
source:
url: https://web.archive.org/web/20230225141147/http://www.old-computers.com/museum/computer.asp?c=105
date: '2023-02-25'
---
The main improvement over the other PET / CBM computers is the 80-column display. The screen is 12'' large and the ROM version is 4.0.
The CBM-80xx was often sold as a "bundle". It was made up of the computer (most often the CBM 8032, though other models were made), the 5.25" double disk drive CBM 8050 (500 KB, 77 tracks) and the bi-directional 132-columns, 160 CPS printer. The 8050 has a 6502 CPU, 4 KB of RAM and 12 KB of ROM (which contains the DOS). It was sold with Ozz, a Database, and a version of the spreadsheet "Visicalc".
---
**Dave Ridley** reports to us:\
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.
**Ben Pony** adds:\
I experimented with the compatibility of this computer and the [C-64](/museum/commodore-c64/). Any software stored on cassette by the CBM could be loaded into the C-64, but C-64 tapes wouldn't work on the CBM.
About the 8296 FDD unit, by **Michael Huth**:\
The 8296DS double disk drive unit uses 2x 6502. They work as multi-processor system. One cpu manages the data transfer and the other the drives hardware. So in fact the floppy has the double computing power than the computer itself.