I am surprised that no one has commented on the serial number of the PET 2001-8 in this week's blog post. Or maybe no one read far enough through to see it? Potentially the first 240V PET? Or at least the first with that style of serial number, with a 1 prefix indicating a 240V model. (115V was 0)

I've been diving deep into analog computing—working on pieces of a kind of hobbyist-grade analog computer. (The way I like to learn a thing is to build a thing.) (If anyone is interested, I've begun documenting in this Google Group: groups.google.com/g/analog-com...) #analogcomputers #electronics

SWEET16 is an interpreted byte-code instruction set invented by Steve Wozniak and implemented as part of the Integer BASIC ROM in the Apple II computers. en.wikipedia.org/wiki/SWEET16

6502 Emulation - The Jump Indirect Bug via Lobsters https://flarestart.com/article/6502-emulation-the-jump-indirect-bug-20260218 #DevNews

**Retro Rover: LT6502 Laptop Packs 8-Bit Power on the Go** Making your own laptop can be a challenging project, but a doable one, especially given the large number of options available today for computing. Of course nothing says you need to use a modern […] [Original post on poliverso.org]

Which was Commodore’s first computer? 1. The KIM-1 2. The PET

Paula Maddox's LT6502 is a modern laptop design based on the retro 6502 microprocessor: github.com/TechPaula/LT...

I got myself some reprints for some good feeling of nostalgia! #8bit #mos6502

Those where the days when the full content of a computer's ROM was printed in the manual!

C64 Brain Returns: A Fresh Start for Commodore 64 Machine Language #Commodore64 #C64 #MOS6502 #Assembly #RetroComputing #Retrogaming #GameDev #Chiptune #Homebrew #Programming theoasisbbs.com/c64-brain-re...

Another project I've enjoyed seeing come together, next: the LT6502, @PaulaMaddox's homebrew MOS 6502-based BASIC-running laptop in a 3D-printed housing. https://www.hackster.io/news/paula-maddox-s-lt6502-is-the-compact-mos-6502-powered-netbook-from-your-80s-dreams-83838407732d #technology […]

New blog post: Remote diagnosing a PET 2001 video fault from one photograph. blog.tynemouthsoftware.co.uk/2026/02/diag... Includes a look at how the PET video system works with redrawn schematics. It also turns out to be a surprisingly early PET 2001.

On this day in 1946, ENIAC - the first general-purpose electronic computer in the US was formally unveiled to the public. It filled an entire room, used 17,468 vacuum tubes, and consumed 150 kW of power. I didn’t quite finish my VR simulation in time for ENIAC day.

You have GUEST access to 28 vintage systems in the browser at connect.sdf.org Experience vintage operating systems, architectures, programming languages and GAMES. icm.museum #retrocomputing #vintagecomputing #retrogaming #gaming

A message from your ZX Spectrum.

Happy Valentines fellow nerds - here are some more blinkenlights to brighten your already great day😍 Now with a 74HC161 counter for additional dynamics!🤓 youtu.be/FOEHbET1tww

Outrageous. In the future there won’t be retro computing because these morons will have killed everyone.

6309 Unleashed video series about building retro homebrew computer #retrodev #retrocomputing #programming

#6502 blog.adafruit.com/2021/09/24/t...

I’ve been developing an #emulator for the MOS 6502 and ran into a hardware bug that occurs when a page boundary is crossed during the jump indirect instruction. Check out my article on the bug & how you can handle it when emulating! markjames.dev/blog/6502-ju... #retrocomputing #emulation

This is brilliant for retro dev. The debugging feedback loop for 6502 is brutal — no printf, no gdb, just cycle counting and hex dumps. Having AI context over virtual machine state means you can ask architecture questions ("why does this sprite flicker on scanline 240?") instead of just syntax.

We’re hosting a PiDP-11/70 Build Workshop in April! Join us for a guided build of your own PiDP-11 and improve your soldering technique through a guided assembly at the museum. Register at: icm.museum/blog/?p=446 #pidp #replica #retrocomputing #vintagecomputing #retrogaming

I’ve created an MCP Server that will help writing and debugging #6502 assembly by creating a virtual machine (based on VirtualKim). If you dabble in 6502 it might be useful. It works alongside Codex, Claude Code etc. github.com/GrantMeStren...

And the clock seems to work. NGL it took way longer than I thought it would and mistakes were made. But between getting in some good scope practice and actually thinking about the schematic properly led me to the issues. Again I tried not to look too much at Bens layout so routing was a bit tricky

Why is the KIM-1, s slow and minimal Computer so relevant for computing history? Let the pope Jim Butterfield tell you: groups.google.com/g/comp.sys.c... :

First we must build a clock. #6502 #beneater Resisted the urge to just copy Ben's layout and forced myself to wing it based off the schematics. I really need to get better at that side of things anyway. Just the first module atm. Decided I don't like the supplied wire so ordered some spools.

We currently offer over 28 vintage systems for free remote guest access featuring historic operating systems, programming languages and games. BOOTSTRAP members may request personal accounts on these machines. Thank you for supporting icm.museum #vintagecomputing #retrogaming #retrocomputing

Something you don't see very often. Inside an 8K Commodore PET model 2001-8N. Notice the 4 holes drilled in the front of the PCB to stop you buying the cheaper model and upgrading the RAM yourself. Yes, they actually did that. Although it wasn't too hard to add bodge wires, I have seen that done.

And so it begins #6502

Fancy tricking out your 6502 or MC6400 trainer, Micro-Professor, or Heathkit? Michael Wessel's board is for you.

An MCP server for developing BASIC and Assembly Language programs for the Commodore 64 github.com/cliffhall/mc... #mcp #c64 #commodore #coding #commodore64 #retrocomputing

In case you missed it, there is a limited edition 10th anniversary reissue of the original VIC20 Penultimate Cartridge from 2016: www.tindie.com/products/tyn... More info in the blog post: blog.tynemouthsoftware.co.uk/2026/01/10-y...

Update just out! Look at that pixelated font. apps.apple.com/us/app/virtu...

🚨Out Now! V1.3 of my SID Soundchip Interface for #RC2014 and compatibles. Updated PCB design, now sporting a mini #C64 PCB to showcase the computer the soundchip is from! Info/Buy: 2014.samcoupe.com #retrocomputing #synth #chiptune #retro #hardware #demoscene #Z80

Full video of the KIM-1 kernal, functional disk drive, and authentic Commodore BASIC all running directly on a Commodore 1541 disk drive!!! Meet FranKIMstein youtu.be/yyDtIBbYES0 #Commodore #KIM1 #RetroComputing #C64Reposts

Have you heard of the PLEASE software package for the KIM-1? Robert M. Tripp created these programs in 1977 by hand, without an assembler. It's a collection of games and tools to help you learning how the KIM works. github.com/jefftranter/...

Troubleshoot the 6502 Processor on Your Atari 8-Bit Computer Circuit Board Using an Oscilloscope atariprojects.org/2024/10/19/t... #atari #atari8bit #retrocomputing #atariprojects

Absolutely truth! And doing 6502 assembly really drives this home Z80 and 6800 both had 16 bit registers… the 6502 use page zero as 128 16 bit registers and page 1 for stack https://masto.hackers.town/@maddiefuzz/115109981438941095

Set myself a challenge for GGJ - build a game in 6502 assembly entirely on the IIGS. For bonus points also only use (scanned) books for reference.

The PLEASE package was published as two documents: INSTRUCTIONS and LISTING. In 2025 I received V2 of the LISTING and the Instruction. Jeff and Kenneth White received V1 of Vern Graner. All this including sources typed in now available here: retro.hansotten.nl/6502-sbc/kim...

OmniPas Pascal Z80/6502 CPU cross-compiler update! syntaxerrorsoftware.itch.io/omnipas/devl...

what's your favourite flavour of assembly? — 6502 is the only one i really know well. 68k is probably the next favorite, though i don't know enough to be useful with it. alterspring.org/@Xkeeper/a/1...

❤️ 6502 ❤️

More old game development disk rescue and archive work underway. The latest batch of 3" disks have had fewer errors than previous ones I've worked with. Fingers crossed it keeps that way!

New blog post - Celebrating 10 years of the VIC20 Penultimate Cartridge with a limited edition reissue of the 2016 version blog.tynemouthsoftware.co.uk/2026/01/10-y... Available now from Tindie www.tindie.com/products/tyn... Or get the latest Penultimate +3 from TFW8b www.tfw8b.com/product/penu...

Working on updating the KIM emulator to support hardware level control over the LED segments. It’s not going well.

I thought all the cool kids* were stopping building big EVs and were going to start making super useful** robots instead. * - lunatic nazis ** - not useful in the slightest

I got up at 5 AM to record with the TWiR crew… totally worth it! It was really fun getting to chat retro with them. What a great bunch!

You know the KIM-1 by now, but what about the SYM-1? retro.hansotten.nl/6502-sbc/synertek-sym-ktm/

KIM1 MOD replica KIM-1 by Voyageur. Battery powered. FM1808 for ROM and RAM keeps contents. From Google group PAL 6502 computer Read aboutKIM1Mod :http://retro.hansotten.nl/6502-sbc/kim-1-manuals-and-software/my-kim-1-family/kim-replicas-and-clones/kim-1-portable-version-made-by-voyageur6502/