Commodore News Page - News: KIM-1, PET, CBM

petdisk-esp32

Antal Arpad Florian Udvari made a new version of the petdisk-esp32, based on the CBM Petdisk from bitfixer. This version has more SMD components and can be ordered from JLCPCB.

2025-11-21 - 12:19:00 - Week: 47 - Item number: 14041 - Category: KIM-1, PET, CBM, Hardware

Tynemouth Software - CBM 4016 Repair

Tynemouth Software has written a blog about the repair of a Commodore CBM 4016 computer. The motherboard was missing IC's, there was some damage to the PCB and the IC-sockets and a few IC's were broken.

2025-10-31 - 12:00:00 - Week: 44 - Item number: 13950 - Category: KIM-1, PET, CBM, Repair

PETpeeve - CBM/PET

PETpeeve is a Commodore PET 8296 demo, developed by Rabenauge, Plush and Crest. The demo was released at the Deadline Demoparty 2025 and reached the first place in the Old-school Compo category. The features are: Interlace 80x50 characters, Hires-GFX, 8 shades of green and a diskette fast loader.

2025-10-17 - 12:07:00 - Week: 42 - Item number: 13915 - Category: KIM-1, PET, CBM, Demo

André Fachat - 8bit-times #35

You can now watch a new YouTube video from André Fachat. In this episode of 8-bit-times: UltiPET, Blinkenlights, FPGASID, I/O board B-series and CC2025 impressions.

2025-09-26 - 12:14:00 - Week: 39 - Item number: 13860 - Category: KIM-1, PET, CBM, Information

cpt_tom - Simulating The Commodore PET

You can read a new blog from cpt_tom about simulating the Commodore PET computer. To simulate the PET he uses the Digital Circuit Simulator by Helmut Neemann. He has a made a simulation for the CBM3032 (dynamic RAM) and the PET2001 (static RAM).

2025-09-05 - 12:18:00 - Week: 36 - Item number: 13802 - Category: KIM-1, PET, CBM, Emulator

Tynemouth Software - 6540-010 ROM replacement

Tynemouth Software has written a blog about the PET 2001 6540-010 character ROM replacement. This updated version has a miniature switch that makes it possible to switch between two character sets (BASIC 1 and BASIC2/4).

2025-08-15 - 12:01:00 - Week: 33 - Item number: 13720 - Category: KIM-1, PET, CBM, Hardware

Ephemeral Cathodic Relay - CBM 8296

Ephemeral Cathodic Relay is a new demo for the CBM 8296 computer, developed by Elder0010 (code) and LRNZ (pixels). The CBM 8296 has no re-definable character set and only a beeper for sound. But the demo features a new video mode exploiting the decay time of the CRT phosphors, 1-bit samples and IRQ loading from the disk drive.

2025-08-01 - 12:20:00 - Week: 31 - Item number: 13698 - Category: KIM-1, PET, CBM, Demo

Geek With Social Skills - CBM 4032 restoration

You can watch a new video from the Geek With Social Skills YouTube channel. In this episode: The restoration of a CBM 4032 computer that was used in the 80s at the Alameda Unified School District. In this restoration: replacing the voltage regulators, electrolytic capacitors, IC-sockets, 2114 video RAM chips and repairing the keyboard conductive pads.

2025-08-01 - 12:03:00 - Week: 31 - Item number: 13681 - Category: KIM-1, PET, CBM, Repair

Little Car - PET Rocks! The Commodore PET Story

You can watch a new video on the Little Car YouTube channel. In this episode: The story of the Commodore PET computer.

2025-06-20 - 12:14:00 - Week: 25 - Item number: 13569 - Category: KIM-1, PET, CBM, Information

On this site you will find software for the AROS - Amiga Research Operating System. Feel free to post your application on The AROS Archives or browse the site for a specific application.

André Fachat - 8bit-times #34

You can now watch a new YouTube video from André Fachat. In this episode of 8-bit-times: The repair of two Commodore PET/CBM keyboards.

2025-06-06 - 12:15:00 - Week: 23 - Item number: 13528 - Category: KIM-1, PET, CBM, Repair

Tynemouth Software - Mini PET 40/80

Tynemouth Software has written a blog about the Mini PET 40/80 Internal. This is a drop in replacement motherboard for a Commodore PET computer, supporting 40 and 80 columns and 32 kB RAM, and a choice of BASIC versions.

2025-06-06 - 12:03:00 - Week: 23 - Item number: 13516 - Category: KIM-1, PET, CBM, Hardware

Poking Technology - PET chip tune

You can now watch a new video from the Poking Technology YouTube channel. In this episode David shows a polyphonic 3.5-channel chip tune tracker for the Commodore PET. The music is a cover of Proton's SID cover of Jugi's Onward Ride.

2025-05-23 - 12:09:00 - Week: 21 - Item number: 13482 - Category: KIM-1, PET, CBM, Music

Qixie - PET/CBM

Qixie is anew game for the Commodore PET/CBM computer, developed by milasoft64. The game is based on the C64 version of game Qix, developed by Roman Werner. In the game you must claim as much of the screen as you can, but avoid the sparks along the border.

2025-05-16 - 12:20:00 - Week: 20 - Item number: 13472 - Category: KIM-1, PET, CBM, Game

Mass:werk - PET2001 More Debug Fun

Norbert Landsteiner wrote a blog about the new debug options for the PET2001 emulator. New: Breakpoint for address ranges, a trap for illegal instructions, a CPU log of the last 1,000 instructions and a breakpoint indicator showing, on which type of breakpoint the emulator had been halted.

2025-05-16 - 12:01:00 - Week: 20 - Item number: 13453 - Category: KIM-1, PET, CBM, Emulator

Poking Technology - CBM/PET - CD Audio

You can now watch a new video from the Poking Technology YouTube channel. In this episode David talks about playing audio on a Commodore CBM/PET 4032 computer. He uses a sampling rate of 60 kHz, but only 1 bit.

2025-05-09 - 12:16:00 - Week: 19 - Item number: 13448 - Category: KIM-1, PET, CBM, Music

PET-PCG-2024

Michael Sachse, developed a replica of the HAL PCG-6500 expansion card. The HAL PCG-6500 made it possible to create a programmable character set generator for PET/CBM computers. This version works with the CBM 2001/3001, and uses DMA-access at $a000 or $9000 for transferring the characters.

2025-05-02 - 12:18:00 - Week: 18 - Item number: 13429 - Category: KIM-1, PET, CBM, Hardware

Ken Shirriff's blog - PET2001 repair

You can read a blog from Ken Shirriff about repairing a Commodore PET2001 computer. When the computer started, the display was full of random characters. In the end, the computer had 6 bad ICs: 2 ROMs and 4 RAMs.

2025-04-18 - 12:10:00 - Week: 16 - Item number: 13378 - Category: KIM-1, PET, CBM, Repair

Steve J.Gray - CBM-II 256K ROM Cart

Steve J. Gray developed a switchable ROM cartridge for the Commodore CBM-II computer. The cartridge has a 256 kB EEPROM, which makes it possible to store 8 ROMs of 24 kB. There is also an option to use the unused CBM-II memory ranges ($1000 or $C000) with an extra connection to the PLA chip.

2025-04-11 - 12:03:00 - Week: 15 - Item number: 13351 - Category: KIM-1, PET, CBM, Hardware

The forum at C64forum.com is all about the Commodore C64 computer.

Tynemouth Software - PET Composite Video Out

Tynemouth Software has written a blog about a new product for the Commodore CBM/PET computers. This is an improved version of the PET Composite Video Out board, which is now available as a kit. The board only has through-hole components, and is relatively easy to assemble.

2025-04-04 - 12:03:00 - Week: 14 - Item number: 13331 - Category: KIM-1, PET, CBM, Hardware

Hey Birt! - 2000K repair

A new video from the Hey Birt YouTube channel is now available. In this video, Birt is repairing a Commodore 2000K game console.

2025-02-14 - 12:11:00 - Week: 7 - Item number: 13193 - Category: KIM-1, PET, CBM, Repair

Mass:werk - PET-Globe demo

Norbert Landsteiner wrote a blog about making the Globe demo for the Commodore PET-2001 computer. The difficulties for making revolving globe demo are the restrictions in memory and only PETSCII characters for the screen.

The Globe demo in the online PET-2001 emulator.

2025-01-17 - 12:08:00 - Week: 3 - Item number: 13106 - Category: KIM-1, PET, CBM, Blog

Escape from PETSCII Castle - CBM/PET

Escape From PETSCII Castle is a new game, inspired by Wolf3D, for the CBM/PET computer, developed by jimbo. Shoot enemies, gather treasures, and find the lift to escape.

2024-12-27 - 12:18:00 - Week: 52 - Item number: 13053 - Category: KIM-1, PET, CBM, Game

Spillhistorie - Microchess

You can read an interview on the Spillhistorie webpage with Peter Jennings, who is the creator of Microchess. The chess-game Microchess was available for the Commodore KIM-1, and is one of the first commercial home computer games ever published.

2024-12-13 - 12:19:00 - Week: 50 - Item number: 13013 - Category: KIM-1, PET, CBM, Interview

Rudy's Retro Intel - SuperPET repair

You can now watch a new video from the Rudy's Retro Intel YouTube channel. In this episode: The repair of a Commodore SuperPET computer.

2024-12-06 - 12:08:00 - Week: 49 - Item number: 12981 - Category: KIM-1, PET, CBM, Repair

PET Gamebase v3.5

If you need a game for the Commodore PET/CBM computers, you can take a look in the PET Gamebase on the commodoregames.net file server. The collection includes colour PET programs, Milasoft collection, Jimbo collection, joystick patched games, demos, rare titles and more.

2024-11-22 - 12:01:00 - Week: 47 - Item number: 12933 - Category: KIM-1, PET, CBM, Game

André Fachat - 8bit-times #33

You can now watch a new YouTube video from André Fachat. In this episode of 8-bit-times: The current state of the Micro-PET family, the Ulti-PET, the Micro-PET and the Ultra-CPU. André talks about the system, graphics, sound features and the I/O.

2024-11-01 - 12:11:00 - Week: 44 - Item number: 12879 - Category: KIM-1, PET, CBM, Hardware

TPUG - André Fachat

You can watch a new video from the TPUG (Toronto PET Users Group) YouTube channel. In this video: André Fachat talks about his development of the Commodore PETs clones, the Ultra, Micro and the Ulti.

2024-10-18 - 12:13:00 - Week: 42 - Item number: 12839 - Category: KIM-1, PET, CBM, Podcast

On this webpage you can find everything about SEUCK games. SEUCK stands for Shoot-Em-Up Construction Kit, and is a program to create games for the Commodore C64 computer.

Tech Tangents - PET keyboard repair

You can watch a new video on the Tech Tangents YouTube channel. In this video: The repair of a keyboard for the Commodore PET computer, by re-applying the carbon layer on the keys.

2024-08-09 - 12:18:00 - Week: 32 - Item number: 12638 - Category: KIM-1, PET, CBM, Repair

Root42 - CBM/PET 40 kB SoftROM

You can watch a new video on the Root42 YouTube channel. In this video: Upgrading a Commodore CBM/PET 3016 from 1979 from 32 kB of RAM to 40 kB of RAM with the help of a SoftROM expansion.

2024-08-09 - 12:07:00 - Week: 32 - Item number: 12627 - Category: KIM-1, PET, CBM, Hardware

André Fachat - Micro-PET family

André Fachat developed a number of 8-bit retro computers, mainly clones of the Commodore PET - but with many more features. The available computers are: Ultra-CPU, Micro-PET and the Ulti-PET.

2024-07-19 - 12:19:00 - Week: 29 - Item number: 12578 - Category: KIM-1, PET, CBM, Hardware

Tynemouth Software - PET 64K / 128K RAM

Tynemouth Software has written a blog about developing an 64 / 128 kB RAM expansion for the Commodore CBM/PET computers.

2024-07-19 - 12:02:00 - Week: 29 - Item number: 12561 - Category: KIM-1, PET, CBM, Hardware

Wizard of Wor - CBM/PET, Plus/4 & C64

Wizard of Wor is a new game for the Commodore CBM/PET, Plus/4 and C64 computers. The game is developed by Kornel Kolma (Ko-Ko). To play the game on a CBM/PET computer, you will need 32 kB of RAM memory.

2024-07-05 - 12:13:00 - Week: 27 - Item number: 12531 - Category: KIM-1, PET, CBM, Game

André Fachat - 8bit-times #31

You can now watch a new YouTube video from André Fachat. In this episode of 8-bit-times: How does a Commodore CBM/PET computer, with a CRTC chip, create the video output.

2024-07-05 - 12:11:00 - Week: 27 - Item number: 12529 - Category: KIM-1, PET, CBM, Video

Tynemouth Software - PET repair parts

Tynemouth Software has written a blog about the using special parts to diagnose and repair Commodore PET computers. The parts are: PET 6550 Video RAM replacement, 2114 Video RAM replacement, PET 6540-010 Character ROM replacement and the PET Video Out.

2024-06-28 - 12:17:00 - Week: 26 - Item number: 12515 - Category: KIM-1, PET, CBM, Repair

ORAC Draughts - PET, C16 & C64

ORAC is a Draughts (Checker) playing program. Its was originally written a long time ago for the PET, then later adapted for the Commodore C64 and Commodore C16 computers. The source-code of the game is available.

2024-06-21 - 12:13:00 - Week: 25 - Item number: 12489 - Category: KIM-1, PET, CBM, Game

Commodore History - B128 power supply replacement

You can watch a new video from the Commodore History YouTube channel. In this video, you can see how to replace the power supply and the clock generator in a Commodore B128 computer.

2024-05-31 - 12:14:00 - Week: 22 - Item number: 12429 - Category: KIM-1, PET, CBM, Repair

The History of Commodore computers on a poster.

Rudy's Retro Intel - SuperPET repair

You can now watch a new video from the Rudy's Retro Intel YouTube channel. In this episode: The repair of a Commodore SuperPET computer.

2024-05-31 - 12:09:00 - Week: 22 - Item number: 12424 - Category: KIM-1, PET, CBM, Repair

KIMplement v1.0 - C64

KIMplement is a KIM-1 emulator for the Commodore C64 computer, developed by Oldvcr. This emulator is used on a Commodore C64 computer and supports TTY and 16 kB of expanded RAM.

2024-05-17 - 12:17:00 - Week: 20 - Item number: 12390 - Category: KIM-1, PET, CBM, Emulator

Tech Time Traveller - KIM-1 repair

You can now watch a new video from the Tech Time Traveller YouTube channel. In this episode the repair of a Commodore KIM-1 computer.

2024-05-03 - 12:20:00 - Week: 18 - Item number: 12351 - Category: KIM-1, PET, CBM, Repair

Rotor Rampage - PET & C64

Rotor Rampage is a fresh and exciting video game designed specifically for the Commodore PET and Commodore C64 computers. The game is developed by Ken McIlveen and Dave Duke. The features are: Joystick and sound support (PET & C64), map-editor and disk & tape versions.

An introduction to the game on YouTube.

2024-05-03 - 12:19:00 - Week: 18 - Item number: 12350 - Category: KIM-1, PET, CBM, Game

Madison Computer Z-RAM

Mike Naberezny wrote a blog about an expansion for the Commodore PET/CBM computers. The Z-RAM adds 64 kB of RAM and a Z80 coprocessor to allow the PET/CBM computer to run the CP/M operating system.

2024-04-19 - 12:17:00 - Week: 16 - Item number: 12308 - Category: KIM-1, PET, CBM, Hardware

Mass:werk - PET2001 jumpers R & S

Norbert Landsteiner wrote a blog about the chip select and jumper settings R and S on Commodore PETs with the dynamic system board.

2024-04-19 - 12:02:00 - Week: 16 - Item number: 12293 - Category: KIM-1, PET, CBM, Blog

André Fachat - 8bit-times #27

You can now watch a new YouTube video from André Fachat. In this episode of 8-bit-times: Sound for the Ultra-CPU board, Micro-PET V3 - DAC and the dual SID board.

2024-04-12 - 12:05:00 - Week: 15 - Item number: 12273 - Category: KIM-1, PET, CBM, Hardware

Commodore CHESSmate reproduction

Michael Gardi made a modern replica of the Commodore CHESSmate. He developed a printed circuit board for the switches and 7-segment displays. The CHESSmate is emulated with a ESP32, and he also 3D printed a new case for the CHESSmate to complete the project.

2024-03-29 - 12:04:00 - Week: 13 - Item number: 12232 - Category: KIM-1, PET, CBM, Hardware

Slimed - PET 2001

Slimed is a new game for the Commodore PET 2001 computer, developed by milasoft64. The game is based on the original game from Jim Summer from the year 1982. The game can be played on a PET 2001 with 8 kByte of RAM memory.

Another game from milasoft64: Space Invaders in colour, for colour PET computers.

2024-03-22 - 12:20:00 - Week: 12 - Item number: 12227 - Category: KIM-1, PET, CBM, Game

The Denial forum is a forum for the Commodore VIC20 computer.