And now the third, a fully functional and complete with the documentation.
A German developed system by Micronic Computer Systeme, short MCS.

I also found over the years documents and dumps of ROMS for the big brother, the MCS Beta 8 development system.

This is a good moment to celebrate the new family member of KIM-1 like systems with better scans of the paperwork for MCS Alpha 1 and the cards and software of the Beta 8, more new photos and a study into the ROM dumps with disassembly and published listings.
You find the result here.

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...

Gebroeders Bruyn, Vinkeveen. Small company, custom made electronics and standard microprocessor boards and systems aimed at industry and hobbyist.
During my years with Radio Bulletin we often worked with Brutech, and I visisted their office/manufacturing plant in Vinkeveen several times. The BEM-bus became the standard bus for expansion at Radio Bulletin after the first BEM-1 card was connected to the KIM-1 by Dick de Boer. Brutech specialized in the beginning on the KIM-1/VIM/SYM-1 expansion cards, later on they made their own CPU cards and besides the 6502 cards with CPUs like the 6809 were available.

Products designed and/or sold by Brutech, if applicable a link to available information is given.
(with thanks to Gerben Voort, René Rutten, Fred Jan Kraan en Robert Henneke)

BEM bus system
KIM-1/B.E.M–1F1A Adapter KIM-1/B.E.M system
B.E.M-RTC-1 Realtime clock
B.E.M-1 2K SRAM
B.E.M-1C 2K SRAM CMOS with Nicad battery
B.E.M-2 4K SRAM
B.E.M-3B-4K 4K SRAM
B.E.M-3B 8K SRAM
B.E.M-4 1K SRAM 3×2708
B.E.M-4K+ 4K SRAM
B.E.M-5 EPROM 8Kbye 2708
B.E.M-6 16/32K EPROM card 2516 2716 2532 2732
B.E.M-PIA-1A Dual PIA 6520/6821
B.E.M-PROG-1 2708 programmer card
B.E.M-CDI-1 Cassettedeck interface for TEAC Recorders
TEAC MT2-04/MT2-CDI MT2-04 TEC DATPACK REcorder with MT2 adapter
B.E.M-COS Cassette Operating system 4x 2708 for TEAC MT2-04/MT2-CDI
B.E.M-VIDEO-1 6545
B.E.M-IMPACT-100 19 inch rack for Eurocards
B.E.M-CPU-1 6502
B.E.M-MON-1 for B.E.M-CPU-1 with RAM/ROM and 6530–04 TIM monitor
B.E.M-CPU-2 6809
B.E.M FDC floppy disk interface FD1793-01
B.E.MOS 14K EPROM operating system assembler/editor/debugger
B.E.M–sbc11X Half EUROCARD 6809 via 6522 RAM/ROM RTC
B.E.M-2 6502 VIA 6522 USART 2561 RAM/ROM
B.E.M-BUS-BP1
B.E.M-9A RAM/ROM/RTC
B.E.M-VIA-1 2x VIA 6522
B.E.M.-SBC2X/SBC3X 6502 (2), 6809(3) RTC 3 VIA 6522 USART 2651/2681
“B.E.M.-SBC4A/4b 6809 RAM/ROM VIA 6522 USART 2651
B.E.M.-SBC4D 6809 RAM/ROM VIA 6522 USART 2651
B.E.M-AD1 General purpose flatcable to other systems
VIM-1
SAMSOM-1 SYM-1 in case
Satellite Video keyboard 24×40 serial Synertek KTM-2
SYMP Universal EPROM program card for SYM-1 2758, 2516, 2716, 2532
B.E.M/PC100 Interface to AIM 65/PC100
PC100 Siemens AIM 65
B.E.M 6502 RAM VIA system
Brutech B.E.M. and Radio Bulletin
Brutech B.E.M. SBC cards

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...

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.

See the archive here

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...

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.\

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...

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.

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...

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:

See also:

A demo of the new facilities in the KIM-1 Simulator 2.2.1

A demo of the new facilities in the KIM-1 Simulator 2.2.1 Scroll, copy paste of the console. New versions of KIM-...

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...