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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

content/museum/commodore-pet-30xx.md

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+---
+title: Commodore PET 30xx
+categories:
+- Computers
+types:
+- Professional Computer
+origins:
+- U.S.A.
+years:
+- '1979'
+cpus:
+- '6502'
+params:
+  name: PET 30xx
+  image: /media/museum/photos/commodore_cbm-3032_1.jpg
+  company: /companies/commodore
+  company_name: Commodore
+  specs:
+  - label: NAME
+    value: PET 30xx
+  - label: MANUFACTURER
+    value: Commodore
+  - label: TYPE
+    value: Professional Computer
+  - label: ORIGIN
+    value: U.S.A.
+  - label: YEAR
+    value: '1979'
+  - label: BUILT IN LANGUAGE
+    value: Commodore Basic
+  - label: KEYBOARD
+    value: QWERTY full-stroke keyboard, and sometimes calculator type
+  - label: CPU
+    value: '6502'
+  - label: SPEED
+    value: 1 mHz
+  - label: RAM
+    value: 8, 16 or 32 k
+  - label: ROM
+    value: 14 k
+  - label: TEXT MODES
+    value: 40 x 25
+  - label: GRAPHIC MODES
+    value: None
+  - label: COLORS
+    value: monochrom
+  - label: SIZE / WEIGHT
+    value: Heavy !
+  - label: I/O PORTS
+    value: IEEE 488, Tape (2)
+  - label: POWER SUPPLY
+    value: Built-in PSU
+  tabs:
+  - photos
+  - adverts
+  - hardware
+  - software
+  - emulators
+  - links
+  - docs
+  photos:
+  - title: ADDON KEYBOARD
+    subtitle: ''
+    text: This picture shows a PET-30xx with an addon keyboard mounted on top of the original one.
+    image: /media/museum/photos/commodore_pet-3000_1.jpg
+  adverts:
+  - title: FRENCH ADVERT (MAY 1980)
+    subtitle: ''
+    text: for the Commodore PET 3001
+    image: /media/museum/pubs/commodore_cbm3001_pub_p.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: Régis Schmidt (CNRS Meudon, France)
+    date: Sunday 12th October 2014
+    text: |-
+      This is the first computer I worked with. It was my first job, and this CBM 3016 were extended to 32Ko RAM like the CBM3032 model.\
+      I did many interface boards for this model and many programs in 6502 assembler too.
+  - author: Yves McDonald (the North, Quebec, Canada)
+    date: Monday 8th May 2006
+    text: |-
+      Well, at least you know the video circuits are working. Looks like the CPU isn't resetting right and isn't executing its code in ROM and fails to clear its video RAM. I had same problem with old Apple 2. It's probably just some corrosion build up on chip leads or sockets. Cleaning up the contacts with a soft pencil eraser and/or reseating the chips will be enough to restart your vintage computer.\
+      Hope that helps.
+  - author: A Hodson (England)
+    date: Friday 6th February 2004
+    text: When I switch my PET on the screen is full of rubbish. It used to work fine sometimes but not now. Can it be fixed?
+  related:
+  - /museum/commodore-cbm-500-600-series
+  - /museum/commodore-cbm-700-series
+  - /museum/commodore-cbm-80xx
+  - /museum/commodore-pet-200
+  - /museum/commodore-pet-2001
+  - /museum/commodore-pet-cbm-40xx
+  - /museum/commodore-superpet
+  software:
+  - /software/space-invaders-669
+  oc_id: 102
+  source:
+    url: https://web.archive.org/web/20230601095109/http://www.old-computers.com/museum/computer.asp?c=102
+    date: '2023-06-01'
+---
+
+The CBM 3xxx and 4xxx series were revisions of the original PET 2001.\
+The range was rebranded CBM (Commodore Business Machine), as PET was dropped.
+
+The 3xxx series introduced the 3000 series ROM sets, BASIC v3, and a completely redesigned keyboard layout, which used a full typewriter keyboard instead of the "mickey mouse" keyboard of the PET, and dropped the on-board cassette unit.