KB-9 or MOS TECH 6502 BASIC V1.1, a 9 digit BASIC for the KIM-1 The same BASIC as in the first PET , OSI, Applesoft. One of the first products of MICRO-SOFT Telephone support by Bill Gates and Paul Allen! Updated, improved and enhanced information and downloads retro.hansotten.nl/6502-sbc/kim...

A deep dive into the TIM 6530-004 Jolt Superjolt Demon software. 1K 6502 code from 1975. The Jolt was maybe the first 6502 based computer, before the KIM-1 and la year before the Apple 1 retro.hansotten.nl/6502-sbc/jol...

A bug in the KIM-1 monitor. I continued my pages on the KIM Explained and found a bug in the KIM-1 monitor: KIM 0200 A9 ;; 00BB 00 :: 00AA 00 ???? FFFF 1C The KIM-1 accepts ':'– '?', as hex characters A ..F! Read more about this in one of the KIM-1 Explained . retro.hansotten.nl/6502-sbc/kim...

Yes it’s real. apps.apple.com/us/app/virtu...

The KIM-1 explained Based upon my experience and study of the KIM-1 since 1979. Many notes on paper and files everywhere. Now consolidated in a lot of pages. retro.hansotten.nl/6502-sbc/kim...

Question on KIM-1: I saw once a table in a magazine with values for the serial interface 110 - 9600 baud CNTL30 and CNTH30 at 17F2 and 17F3 for various baudrates. I can not find it anymore. Any clues?

Thanks to some software tricks, a simple and low-cost add-on circuit, and a new way to speed up a microprocessor, you can now build a video interface for your microcomputer for an investment of only $20 to $35. www.tinaja.com/glib/pop_ele...

A refreshed page on suppressing the KIM-1 echo of TTY input, read non-blocking and make the TTY input deaf. Here I present solutions for these problems in software You can have serial input without echo, non-blocking and make the TTY input deaf for input. retro.hansotten.nl/6502-sbc/kim...

Many sources of the KIM-1 monitor are floating around None deliver the real KIM-1 ROMs, . So in June 2026 I have typed in the source as listed in the User manual. Converted to MOS Tech assembler format, delivers the exact ROM binary including 00 filler bytes. retro.hansotten.nl/correct-kim-...

MOStermind is an implementation of the Mastermind board game for the KIM-1 computer. Developed by HKZ. codeberg.org/hkzlab/MOSte... Does it run on the KIM-1 Simulator? YES! You only have to set the FOCAL_V3D break setting in the Settings.

I saw an advert on ebay (China seller) for a Rockwell 6503 IC 40 pin. The 6503 has 28! I ordered one I searched the internet for the 338-6503 printed on the IC and found references to it being a R65C02. And indeed, the 6502 testers recognized it as working 65C02. Weird!

I acquired a 1 MHz IC R6500/1E Microprocessor Emulator Device, an IC made by Rockwell for developing applications for the R6500/1 Microcomputer family. More information on the R6500/1 retro.hansotten.nl/6502-sbc/aim...

Again Eduardo Casino has enhanced the KIM-1 Simulator V2.3.0 – The Console has now a complete VT100 emulation DEC Special Character set – The K-1008 Visable Memory is fast! – All settings are saved between sessions retro.hansotten.nl/kim-1-simula... Demo here: youtu.be/GPxkr7j1P6k

Demo of KIM-1 Simulator V2.3.0

YouTube video by Hans Otten

youtu.be

A KIM-3B is a 8K bytes memory expansion made by MOS Technology (already part of Commodore then) for the KIM-4 motherboard. I recently acquired a good looking KIM-3B myself. Nothing new, all is already known about it. Now with photos made by myself!

New version of the KIM-1 Simulator coming: complete VT100 support in the console!

TERC, an educational center, has developed around 1980 an interface system for the KIM-1. It makes the I/O available with solderless connections, has a breadbaord and connections for audio tape input/output, power supply and teletype. I recently acquired this up till now unknown interface.

SYM-1 by Synertek was another KIM-1 competitor. Compatible enough to run KIM software, different enough to justify its own manual. The 6502 trainer market of the late '70s was surprisingly crowded.

Much much better <3

A demo of the new facilities in the KIM-1 Simulator. youtu.be/eROGWF9pVmw

Copy Paste Scroll demo with the KIM-1 Simulator

YouTube video by Hans Otten

youtu.be

A survey of 6502 testers: youtu.be/njk2lyxioyo retro.hansotten.nl/what-cpu-is-...

A survey of devices that help test CPU's like the MCS650X or MC680X families.

YouTube video by Hans Otten

youtu.be

Nice to see my white 6502 CPU is OK, and is indeed missing the ROR instruction.

2 new KIM-1 videos: youtu.be/f0VLC-ol2EA?... youtu.be/-X5MzW2Rz1c?...

Zork and the Z-machine on the KIM-1

YouTube video by masterhit1

youtu.be

More MTU Micro Technology Unlimited material added: retro.hansotten.nl/mtu-document...

www.youtube.com/watch?v=fVIj... Use a PET as cassette player for the KIM-1

My new Jolt!

Tindie is back!

R65 – A late seventies computer built with a KIM-1 by Rene Richarz. An amazing showcase of how far a KIM-1 and Pascal as programming language can go! Information on the R65 and emulator of this computer on github archive of Rene Richarz Including sources and documentation github.com/rricharz/R65

There are at least seven KIM-1 board revisions, labeled A through G (plus the original unlabeled one). Rev C is a mystery - nobody's confirmed one exists. If you have one, the retro computing world would like a word. retro.hansotten.nl/kim-1-what-changed-in-the-revisions/

MTU K-1013 FDC emulation added to the KIM-1 Simulator. Eduardo Casino added the FDC support. Now not only the SD Shield but also the upd765 based FDC support allows to run CP/M-65 and the native CODOS for KIM-1 operating systems. retro.hansotten.nl/6502-sbc/kim...

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

GitHub - rricharz/R65: Code and emulator of my home built R65 computer, built around 1978

Code and emulator of my home built R65 computer, built around 1978 - rricharz/R65

github.com