Brutech Electronics Microsystems – B.E.M
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)
See the adverts below.
Microgebeuren
B.E.M 4K+
A 4K SRAM card in small format for KIM-1, SYM-1 and AIM 65.
I own this 4K RAM card.
B.E.M-PROG-1 2708 programmer card
B.E.M-CPU-1 6502
Low cost 6502 CPU card
B.E.M.-SBC2X/SBC3X 6502 (2), 6809(3) RTC 3 VIA 6522 USART 2651/2681
B.E.M.-SBC2X/SBC3X 6502 (2), 6809(3) RTC 3 VIA 6522 USART 2651/2681
6502 SBC2 or 6809 SBC3 based card.
B.E.M-VIDEO-1 6545
A video card with the 6545 controller. Black and white composite.
B.E.M-MON-1 for B.E.M-CPU-1 with RAM/ROM and 6530–04 TIM monitor
B.E.M–sbc11X Half EUROCARD 6809 via 6522 RAM/ROM RTC
B.E.M–sbc11X Half EUROCARD 6809 via 6522 RAM/ROM RTC
B.E.M-RTC-1 Realtime clock
B.E.M-RTC-1 Realtime clock
Clink for large image
B.E.M-1 2K SRAM
A simple 2K SRAM card with 16 2102 ICs. Used in the first hardware expansion article in Radio Bulletin 1977.
B.E.M Impact 1000
A 19 inch rack based system with eurocards. a development system, floppy drive based.
PC100 (AIM 65 OEM by Siemens)
Samson and Satellite
BEM BUS system Eurocord system
VIM-1 (SYM-1 first version)
BEM-4
1K SRAM, 3x 2708 EPROM
KIM-1, AIM-65, SYM-1 and other 6502/65C02/65C816 related books.
A mix of English, German and Dutch books.
On my bookshelf I have quite a collection of books on the 6502 family.
Note that manuals and books that come with systems are shown on the pages of the corresponding system!
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KIM-1 experiments |
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How to Build a Computer-controlled Robot (with a KIM-1)
Tod Loofbourrow
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Microprocessor Systems Engineering
R.C. Camp, T.A. Smay, C.J. Triska
AIM 65 System 65 parts |
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Microprocessor programming and applications
for scientists and engineers (Richard R. Smardzewski
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6502 Software Gourmet Guide and Cookbook |
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6502 Users Manual |
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AIM 65 Laboratory Manual And Study Guide |
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Anwendunsgbeispiele fûr den Microprozessor 6502 |
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Microprocessor_Fundamentals KIM-1 |
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Best of Micro Volume 1 1978 |
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Best of Micro Volume 2 1979 |
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Best of MICRO 3, AIM 65 SYM-1 KIM-1 part June 1979 May 1980
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Compute’s Machine Language for Beginners |
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Compute’s The Second Book of Machine Language |
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Programming a Microcomputer 6502 |
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Programmieren von Mikrocomputern CPU 6502 (Skriptum) |
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How to Build a Microcomputer .. and really Understand It! |
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Mikrocomputer ohne Ballast |
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Micro Principles KIM-1 user guide chapter 8 |
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Digitaalschakelen met de KIM-1 |
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6502 Assembly Language Programming |
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6502 Programmieren in ASSEMBLER |
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Microcomputer Experimentation with the MOS Technology KIM-1 |
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6502 Machinetaal Subroutines |
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6502 Assembly Language Subroutines |
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Microcomputer experimentation with the AIM 65 |
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Machine Language Programming Cookbook part 1 |
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Machine Code for Beginners |
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Microcomputer Systems Principles Featuring the 6502 KIM |
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Beyond Games: System Software for your 6502 Personal Computer |
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Assembly Language Programming |
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Using 6502 Assembly Language |
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6502 Machine Code for Humans |
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Programming the 65816 including the 6502, 65C02 and the 65802 |
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Programming the 65816 including the 6502, 65C02 and the 65802 |
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Forth Programming |
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Programming the 65816 |
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Programming and Interfacing the 6502 with Experiments |
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Synertek 1981-1982 Data Catalog |
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Synertek DataBook 1983 |
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Third Book of OSI |
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TSC 6502 Games Package 1 |
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TV Typewriter Cookbook |
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Zaks 6502 Anwendungen |
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6502 Games |
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6502 Applications |
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Advanced 6502 Programming |
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Fortgeschrittene 6502 Programmierung |
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Programmierung des 6502 |
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Programming the 6502 |
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6502 Applications book |
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Programmeren van de 6502 |
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Microprocessor Interfacing Techniques |
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Microprocessor Concepts and Applications
Publisher: Lab-Volt |
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6502 Assembler-Kurs für Beginner |
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6502 Machine Code For Beginners |
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A low-lvel language for use on the MOS 6502 Microcomputer |
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6502 Microcomputer Programmierung |
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Programmieren in Maschinensprache 6502 |
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The Giant Handbook of Computer Projects |
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First Book of KIM, 1977, 1978
Published by Hayden Book Company. Later version, corrected edition
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First Book of KIM, 1977
Published in Europe by Human Electron GMBH. Earlier version, corrections required
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The Appendix SYM/KIM tot the First Book of KIM
1979, Robert A Peck, Hayden Book Company
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Rockwell Produktübersicht in deutsch |
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Rockwell Microelectronic Data Devices Catalog 1979 |
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1981 Rockwell Electronic Devices Division Data Book |
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1984 Rockwell Data Book |
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1985 Rockwell Data Book |
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1987 Rockwell Controller Products Databook |
Micro Technology Unlimited produced a lot of hardware and software for the KIM-1, SYM-1, AIM 65 and more.
The company is still in business, now sells Karaoke software.
On these pages I have collected what is known about MTU and the products for the KIM-1 (and the MTU-130/140).
With thanks to David Williams, Eric Wright, Dave Plummer, Jack Rubin and Eduardo Casino.
Forethought Systems produced a motherboard, the KIMSI, for the KIM-1 in 1977 that enables to add 8 S-100 boards to a KIM-1.
The S-100 standard, developed for the IMSAI and such 8080/Z80 systems, was a huge success that made affordable standardized systems available, mostly with CP/M as operating system.
The KIMSI married the 6502 world to these pool of boards. The KIMSI was sold as kit, with one S-100 connector. OF the KIMSI’s I have seen most were used with a memory board.
I acquired a KIMSI in August 2026. It was build into a plexiglas/aluminium case, with a KIM1 (Rev G) and a ‘microcalculator board’. For photos see below.
The BETSI: S-100 bus for the PET
My KIMSI
I acquired a KIMSI in August 2026. It was build into a plexiglas/aluminium case, with a KIM1 (Rev G) and a ‘microcalculator board’. I took the system apart, no room to store the big ugly thing.
Other KIMSI photos from the internet
MOS Technology, as part of Commodore, enhanced their KIM-1 offering with a range of add-on products.
Under the name KIM System Products hardware such a Motherboard (KIM-4), Memory expansions(KIM-2, 3, 3B) and software like the Cross Assembler, the KIM-5 Resident Assembler/Editor, and KIMath.
The Cross-Assembler was used at MOS Technology to create the very first 6502 code, like the KIM-1 ROMs or the TIM ROM (MCS6530-004).
Cross Assembler
KIMath package
See also the KIM-5 page for KIMath provided as 6540 ROM for the KIM-5 ROM baord.
RNB Enterprises sold a range of AIM 65/SYM-1/KIM-1 extension cards, ranging from a VAK-1 Motherboard, RAM and EPROM cards anda prototyping card.
Photo by Eric Dennison
Photo by Eric Dennison
Byte Magazine 1979 01 RNB Enterprises SYM-1 KIM-1 VAK-X boards advertisement
The DATAC 1000, a single-board computer based upon a 6502 and a TIM RRIOT, designed in 1976 by Philadelphia Area Computer Society club members Carmen DiCamillo and Roland James.
This single board computer was premiered at the club’s August 1976 meeting in Atlantic City, NJ. Once “perfected,” the computer helped introduce many PACS members, and others,
to the field of microcomputers. The official manufacturer of this computer was Datac Engineering of Southampton, PA.
The computer was available in two models: the $185 “tutorial” version and the fully populated and tested version for $345.
In either case the 6502 CPU was included. Computer was instantly usable and featured expansion capabilities, touch sensitive input keypads and a documentation package.
The computer was so revolutionary that it was featured in Byte Magazine’s July 1977 edition.
Photos and information thanks to https://oldcomputermuseum.com and https://www.kennettclassic.com/ and intagecomputer.net
DATAC 1000 by Datac Engineering 1976
– CPU MOS 6502 1 MHz
– RAM 1K (2111 SRAM)
– RRIOT TIM 6530-004 for serial I/O and ROM
– I/O ports with a PIA 6520
– tape interface, bus expansion, serial (to connect to a terminal)
– Touch-sensitive pads 27 LEDs
– Power supply external 9 VDC PSU
Downloads:
Schematic of Datac 1000
Byte July 1977
Roy Brade with his expanded Datac 1000
