website/content/museum/commodore-pet-cbm-40xx.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
Commodore PET / CBM 40xx	Computers	Home Computer	U.S.A.	1980	6502	name image company company_name specs tabs forum_thread photos hardware emulators links docs related oc_id source PET / CBM 40xx /media/museum/photos/commodore_pet4032_1.jpg /companies/commodore Commodore label value NAME PET / CBM 40xx label value MANUFACTURER Commodore label value TYPE Home Computer label value ORIGIN U.S.A. label value YEAR 1980 label value BUILT IN LANGUAGE Commodore Basic 4.0 label value KEYBOARD QWERTY full-stroke keyboard label value CPU 6502 label value SPEED 1 MHz label value RAM 16 or 32 KB label value ROM 20 KB label value TEXT MODES 40 columns x 25 lines, upgradable to 80 columns label value GRAPHIC MODES None label value COLORS Monochrome label value SOUND Programmable piezo buzzer label value SIZE / WEIGHT Pet 4032 : 9'' x 17'' x 17'' / 45 lbs label value I/O PORTS IEEE 488, I/O ports (8), Tape (2) label value POWER SUPPLY Built-in PSU label value PRICE £775 (UK, 1984) photos hardware emulators links docs 117 title subtitle text image PET-4016 A CBM/PET-4000 computer with only 16k RAM. /media/museum/photos/commodore_pet4016_2.jpg title subtitle text image PET-4016 /media/museum/photos/commodore_pet4016_3.jpg title subtitle text image PET 4032 actually a "fat-40"... All PET/CBM 2/3/4xxx series had the small screen. The first large screen PETs were the CBM 8xxx series, afterwards Commodore added the larger screens to the 4xxx range and dropped the graphics keyboard as the system was targetted at business use. /media/museum/photos/commodore_pet4032_3.jpg title subtitle text image PET 4032 OPENED /media/museum/photos/commodore_pet4032_opened.jpg title subtitle text image HYBRID PET-4032 This is a strange version. It is labeled PET-4032 but has a CBM keyboard (no graphics). It is a 4032 model but has a small screen just like a PET-2001... Even more enigmatic, it has a "PET 2001-32" label at the back. /media/museum/photos/commodore_pet_4032_2.jpg title subtitle text image 4032 MOTHER BOARD **(1)** IEEE488 port. Can adress up to 15 peripherals. Used for printer and disk drives.\ **(2)** User port. Includes parallel and video interfaces.\ **(3)** Tape-recorder port. Requires a specific Commodore tape-recorder to be used.\ **(4)** Second tape-recorder port.\ **(5)** Expansion connector.\ **(6)** ROM chip holding Commodore Basic language ver.4 and operating system.\ **(7)** Piezoelectric loudspeaker.\ **(8)** Keyboard connector.\ **(9)** 32 Kb. RAM chips, expandable to 96 Kb.\ **(10)** Chips in charge of handling the peripherals.\ **(11)** MOS 6502 microprocessor.\ **(12)** Interface and synchronization 6522 chip.\ **(13)** Characters generator chipset for upper case, lower case and graphic characters. /media/museum/photos/s_commodore4000_motherboard.jpg title subtitle text image CLOCK/CALENDAR MODULE Could be connected to any PET/CBM user port. Clock and calendar were battery backed up. /media/museum/hardware/commodore_pet_clockmodule_1.jpg title subtitle text image EPROM PROGRAMMER Could burn 2716 and 2732 Eprom chips. /media/museum/hardware/commodore_pet_epromprog_1.jpg title subtitle text image TNW-2000 IEEE-488 to Serial converter Thanks to **Pascal Rollin** /media/museum/hardware/commodore_pet_tnw2000_1.jpg title subtitle text image DUAL DISK-DRIVES Model 2040 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. /media/museum/hardware/commodore_cbm2040-dualdisks_1.jpg title subtitle text image 8050 DUAL DISK-DRIVE 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. /media/museum/hardware/commodore_cbm_8050_diskdrives.jpg title subtitle text image 8250-LP DUAL DRIVE UNIT 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! /media/museum/hardware/commodore_700_8250fddunit_1.jpg title subtitle text image 9090 HARD-DISK 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. /media/museum/hardware/commodore_cbm_9090_harddisk.jpg title subtitle text image 8023P COMMODORE TRACTOR PRINTER /media/museum/hardware/commodore_printer_8032p.jpg title url platform text Versatile Commodore 8-bit Emulator (VICE) http://www.6502.org/users/andre/index.html Windows title url text Larry's PET/CBM Pages http://www.portcommodore.com/petindex.php?path=main-cbmidx Excellent source of information for PET/CBM computers title url text PET index http://www.6502.org/users/andre/petindex/index.html Some useful info here about PET computers title url text The Commodore CBM-II page http://ca.geocities.com/SJGRAY@ROGERS.COM/CBM/ All things CBM-II title url text THE Independent Commodore Library http://freespace.virgin.net/ken.ross1/ All sorts of programs here, text files covering a wide range of subjects title url text TPUG - Toronto PET Users Group Inc. http://www.tpug.ca/ The Commodore PET Users Group, founded in 1979 ! (seems offline, mail us their new address if you find it) title url text www.commodore.ca http://www.commodore.ca/products/pet/commodore_pet.htm Excellent site with a lot of info about Commodore computers including dedicated PET pages title url text Web Wiz CAPTCHA http://www.webwizcaptcha.com Discussion about Commodore micros title url cover text COMMODORE BASIC VERSION 4.0 - USER'S REFERENCE MANUAL http://www.commodore.ca/manuals/default.htm /media/museum/docs/couvs/commodore_basic_4_users_reference%20manual.jpg [**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 url cover text COMMODORE PET MACHINE LANGUAGE MONITOR http://www.commodore.ca/manuals/default.htm /media/museum/docs/couvs/pet_machine_language_monitor.jpg [**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) /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-30xx /museum/commodore-superpet 103 url date https://web.archive.org/web/20230402091743/http://www.old-computers.com/museum/computer.asp?c=103 2023-04-02

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.