Published in the Byte Book of Computer Music, 1979. Written by Peter H. Myers.

Scanned article here.

The listing is converted to MOS Technology standard assembler source. The resulting code compared to the publsihed code.
Here and archive with source and papertape binary.\

I started writing about my interest in electronic since 1970. And in 1977 the magazine (Dick de Boer!) introduced me to the KIM-1, and that enhanced my joy with electronics with computing.
At the university in these days electronics and computer science also came together.

We have published many articles around the KIM-1. Alas in Dutch and only on paper. Published on this website, see the Radio Bulletin pages.

Many of the articles deserve a wider public, the KIM-1 and its clones are used by a broad international public.
So I started a new project: translate the articles to English and make the software available in assembler and binary format.

Follow the progress here, articles already published are:

Mastermind on the KIM
Morse decoding with the KIM
Melodiant
Frequencymeter
EPROM Programmer

Acquired August 2026, as built in a KIM-1 with KIMSI system.
Page updated September 2026 with scans and KIM-1 source of the original manual and brochure.

He was not so happy with the NTSC composite signal of this Replica 1. So he reworked the source files of the Propeller to support PAL formatted video.

The thread on the design is here.

EXPLIT created a github archive as a fork of the github from Vince Briel, with original and PAL adapted source files.

More on the Apple 1 Replica’s here.

This is how the PAL output looks: sharp, no artefacts, black on white:

Photos of the build by EXPLIT:

I acquired a KIMSI in August 2026. It was build into a plexiglas/aluminium case, with a KIM-1 (Rev G) and a ‘microcalculator board’. I took the system apart, no room to store the big ugly thing.

Next photos by Paul Schroeter.

Here the images