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Bulgarian IT history : Small Educational Computer MUK-600 / MUK-601

The MUK-600 (MUK - short for "Small Educational Computer" in Bulgarian) computer has been developed at the Department of "Computing" in the Higher Institute of Mechanical and Electrical Engineering "Lenin" - Sofia (today Technical University - Sofia) by prof. Bojan Yankov, his assistant Hristo Shoilev and graduates as an aid in training. In institutes Education-experimental plant (school plant) several units were build.

The computer is based on the Bulgarian microprocessor family SM600 and can be used for:

  • Calculations and to solve engineering problems and tasks;

  • Management - as a system for automation of production;

  • System for collecting and processing data signals and information;

  • Terminal to more complex computer systems;

  • Training in the basics of computer programming in BASIC, Assembler, etc .;

  • Games, entertainment and more.

Later the computer was further developed by prof. Boyan Yankov and Eng. Vitko Mekov and in 1988 the technical magazine "Young designer" among several published patterns, graphic originals and software of "MUK-601" and the expansion module to it with additional memory, connection to floppy disk drives and a parallel port.

The CPU is SM601 - a blgarian clone of 6800 processor. The PC has 10KB RAM and 12KB ROM in its basic configuration. A cassete recorder can be used to store programs and information.
The expansion block adds 10KB RAM and 10KB ROM, parallel port, and possibility to connect up to two IZOT ES5088 floppy disk drives. The DOS offers up to 70KB per floppy disk.
The software includes a Monitor control program, BASIC interpreter, Disk Operating System and Graphics editor.

There are some errors in the articles:

  • The D18 IC on the expansion block is SM603 (in the text SM602 is listed).

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