Brutech B.E.M. – Retro Computing

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.

BEM bus system
KIM-1/B.E.M–1F1A Adapter KIM-1/B.E.M system
VIM-1/B.E.M–1F1A Adapter VIM-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

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.

BEM-4KPlus

B.E.M-PROG-1 2708 programmer card

B.E.M-CPU-1 6502

Low cost 6502 CPU card

	BEM-CPU-1 circuit diagram
	BEM-CPU-1

B.E.M.-SBC2X/SBC3X 6502 (2), 6809(3) RTC 3 VIA 6522 USART 2651/2681

6502 SBC2 or 6809 SBC3 based card.

	BEM-SBC3 circuit diagram
	B.E.M.-SBC2X/SBC3X datasheet

B.E.M-VIDEO-1 6545

A video card with the 6545 controller. Black and white composite.

B.E.M-VIDEO-1 datasheet

B.E.M-MON-1 for B.E.M-CPU-1 with RAM/ROM and 6530–04 TIM monitor

B.E.M-MON-1 for B.E.M-CPU-1

B.E.M–sbc11X Half EUROCARD 6809 via 6522 RAM/ROM RTC

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-1 2K SRAM
	Geheugenuitbreiding voor de KIM Radio Bulletin November 1977 Original article
	Memory expansion for the KIM RB Nov 77 English
	Geheugenuitbreiding KIM Dutch
	Memory expansion for the KIM source and binary