This is what a maxed out KIM-1 looked like: R65 - A late seventies computer built with a KIM-1 github.com/rricharz/R65... #65o2 #mos6502 #kim1

Wanted a case for a KIM-1? Options in the 80ties were available. Here an example, suitable for educational purposes.

What changed in the KIM-1 Revisions? The PCB underwent several changes around the logo area, takeover by Commodore . The big change was in the clock circuit between the first edition and Rev A. The first batch of KIM-1 suffered from the issue that the clock would not start. It was fixed in Rev A.

New versions of KIM-1 Simulator (V2.0.0) with SD Card Shield, CP/M-65 and xKIM, and Jolt Simulator (V0.9). Read all about it here: retro.hansotten.nl/new-versions...

Eduardo Casino has created a faithful replica of the Jolt single board computer. 6502,6530-004 TIM and 6520. TTY or RS232C 512b RAM. He designed using the information available. The replica on GitHub, github.com/eduardocasin... More information on the Jolt, retro.hansotten.nl/6502-sbc/jol...

White KIM-1 cleanup This one is a Rev D with a ‘white’ PCB. The KIM-1 is working. The keyboard handmade@. With the DIY keypad method based upon the work of Eduardo Casino and Pete (peo2000)I replaced the keyboard Wires removed clean with alcohol and a brush this KIM-1 may join my collection

A spare KIM-1 keypad is even rarer than a KIM-1 itself. With this guide you can build a reasonable replica of the keypad. Thanks to the work of Eduardo Casino (the PCB) and Pete (peo2000 on forum64.org) I have published a DIY guide for a KIM-1 keypad replica. retro.hansotten.nl/6502-sbc/kim...

The A-ONE family on my desk

In 2025 Franz Achatz revived the A-ONE Apple 1 replica. The excellent design is refreshed, a new family member added: the A-ONE PLUS. I now have the 2025 standard board, the 2025 PLUS and the 2006 EXTENDED. With the prototype boards and cassette interface. retro.hansotten.nl/6502-sbc/app...

Apple 1 show off

Sir Charles Antony Richard Hoare (11 January 1934 – 5 March 2026), also known as C. A. R. Hoare, pioneering computer scientist. His seminal contributions include - Quicksort Quickselect Hoare logic Null reference Communicating sequential processes Structured programming ALGOL

Here is a brief document showing commands available and an introduction to using the assembler: github.com/DavidJRichar... Best regards, David

The KIM-1 had 1K of RAM and a hex keypad. No screen. No keyboard. No storage. And yet people wrote chess programs for it. In hex. By hand. We were not okay.

Adventue - Colossal Cave got a full port to the KIM-1 by Ryan Roth. What a Hero. github.com/ryaneroth/Ad... #65o2 #kim1

One ROM Hardware Guide: Getting Started with One ROM #1 #RetroComputing #OneROM #HardwareHacking #8bit #VintageComputing #ROM #Commodore #RetroTech #DIYElectronics theoasisbbs.com/one-rom-hard...

New project, cleanup and restore this KIM-1 . Poor thing still works but had a rough life. KIM-1 collection complete now ..

Royce Taft has a MACH-9 MMS Inc 6809 CPU Plug-in for AIM 65 and reverse engineered it. He sent me his design to be published here. retro.hansotten.nl/6502-sbc/aim...

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

Troubleshoot a 6502? See this session: atariprojects.org/2024/10/19/t...

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/

PicoSYM, a SYM-1 emulator on a Raspberry Pico Emulation of Synertek SYM-1 on a Pico By andysa on 6502.org Read about it: retro.hansotten.nl/6502-sbc/syn... PicoSYM emulates a SYM-1 with the Supermon V1.1 Monitor, Basic, RAE Assembler & Editor and 1541DOS at the typical addresses. .

MS Basic running on the 1541 with load and save implemented. Dave‘s a biest x.com/commodoreihs...

www.osnews.com/story/144242... #kim1 #65o2

Wow! Dave McMurtries 1541KIM is gettigng disc routines as it seems \o/ 💾 🎉 github.com/commodoreihs...

The LEDIP text editor or MicADE, a database program called Datensuche, calculators, a clock, a banner printer, and even music programs. A tiny computer with a huge ecosystem. 🚀🖥️

Which transistors are used int he KIM-1 and clones? The LED driver and serial circuit require transistors. MOS used 2N5371 and 2N5375, in later KIM-1s a wider variety. A question in forum64.de in the Nachbau KIM-1 thread made me look at my KIM-1 retro.hansotten.nl/6502-sbc/kim...

50 years of KIM-1! The birth can be traced to January 1976. The sale ended in 1981. KIM is Dead!!! Long KIM!!!

Your first KIM-1 program! www.kim-1.com/docs/usrman....

But you can’t beat the real thing. Look at those yellow capacitors!

The great thing about the KIM-1 is that if you don’t have an original you can build yourself a clone. Here is a PAL-II you can find on Tindie beside an original.

Mark Wutka's Linux command line github.com/wutka/kim1-e... Oskar Vermeulen's Arduino based obsolescence.wixsite.com/obsolescence... And to know what you are doing get "The First Book of KIM" by Butterfiels, Ockers, Rehnke retro.hansotten.nl/6502-sbc/kim... #65o2 #mos6502 #kim1 #kim-1

An original KIM-1 is expensive these days. To get a clue what this computer was all about, you can emulate it - here are several emulators: Hans Otten's Win / Linux retro.hansotten.nl/6502-sbc/kim... John's iOS apps.apple.com/us/app/virtu... Maksim's Browser maksimkorzh.github.io/KIM-1/ #kim1at50

Here are mine. A rev G KIM-1 and a licensed clone from Digitus of Sweden, serial number 008. #KIMat50 #ShowYourKIM1 #KIM1 #RetroComputing.

50 years of KIM-1: KIM Clones Vince Briel was the first with the MicroKIM. replacement of the 6530 RRIOT with a 6532 RIOT and an external ROM. The idea from Ruud Baltissen. The PAL-1 and PAL-2 still available Top Briel MicroKIM, Corsham KIM Clone and PAL-2. Bottom PAL-1 , Corsham breadboard.

🖥️🎂 The KIM-1 just hit level 50! Own one? Clone? Let’s SEE IT! 👀 Post your machine! #KIM1at50 #ShowYourKIM1 #RetroComputing #KIM1 #65o2

Not only Edison, but the Solo OS with Concurrent Pascal by Per Brinch Hansen, can run in simh: pascal.hansotten.com/2026/01/13/s...

50 years of KIM-1 and me retro.hansotten.nl/50-years-of-... I have collected some KIM-1's over the years. The first KIM-1 in 1978, and now I have nine original KIM-1s, from first edition to Rev A, B, D, E , 2x F, 2xG. And several reproductions with 6532's as replacements.

One of the very first _affordable_ computers that could be used by hobbyists was the KIM-1 from MOS (later Commodore). The KIM-1 is 50 (!!!!) this month. github.com/netzherpes/K...

The KIM-1

Back when computers were new, they required good documentation (sadly this practice has ended for the most part). The KIM-1 had EXCELLENT supporting manuals.

🎉 HAPPY BIRTHDAY, KIM-1! 🎉 Wishing you — and all of us — a fantastic and hacky Year 2026 🥳✨ This is the demos final version: youtu.be/aikJvjdEDto #KIM1at50 #ShowYourKIM1 #65o2 #RetroComputing

Happy 50th Birthday KIM-1 https://github.com/netzherpes/KIM1-Demo (https://news.ycombinator.com/item?id=46575804)

Happy 50th Birthday KIM-1 https://github.com/netzherpes/KIM1-Demo (https://news.ycombinator.com/item?id=46575804)

50 YEARS of KIM-1 A little demo by Michael Doornbos imapenguin.com/2025/05/10-p... vimeo.com/1082631462?f...

Ready to celebrate the half-century (!) birthday of the KIM-1? github.com/netzherpes/K...

🔆 Stars 😍

The Edison system, language and OS. Per Brinch Hansen, the master of simplicity in IT. Book from 1982, disks dumped in 2025, files extracted in 2026. And with simh you can run the Edison system. pascal.hansotten.com/per-brinch-h...

Faithful replica by Eduardo Casino of the K‑1002 8‑bit audio Digital‑to‑Analog Converter card for the KIM‑1, SYM‑1, and AIM‑65 computers, originally designed by MTU in the late ’70s. github.com/eduardocasin...

The KIM UNO, the little cheap KIM-1 hardware emulator needed some information added. Photos, links, text. Like the recently acquired KIM UNO from retro4004bits, alternative firmware by Willem Aandewiel for better LED display and Keypad control. retro.hansotten.nl/6502-sbc/kim...