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I > ISOT > EC-1035   


Very little information about this Bulgarian mainframe used by big East European companies as an industrial or information management system.

It was partially compatible with IBM mainframe and could also share programs and data with the russian Minsk-32. It could run in multiprogram mode thanks to its virtual memory.

The ISOT brand name means 'State Economic Alliance'

Thanks to Bojidar Stefanov for information and picture.

We need more info about this pong ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.
Please consider donating your old computer / videogame system to or one of our partners.


This was an IBM370 series compatible computer.
We used it with IBM-DOS/VS-POWER system.

Thursday 22nd November 2012

Probably because EC in Cyrillic looks like ES in Latin alphabet

Saturday 17th March 2012
Dave Witt (Canada)

hmm, the name says EC-1035 but the brochure states that it's a ES-1035... weird

Wednesday 12th December 2007
Thomsonicus (Poland)


NAME  EC-1035
ORIGIN  Bulgaria
YEAR  1977
CONTROLLERS  Terminal keyboard
CPU  ES-2635 (?)
BUTTONS  160 000 operations per second
SCORE  256 to 512 KB. 16 MB virtual memory max.
ROM  BIOS in ROM, size unknown
TEXT MODES  Depends on the terminal used
GRAPHIC MODES  Graphic capabilities with some ISOT video terminals
SIZE / WEIGHT  100 square meters!
BUILT IN MEDIA  Magnetic tapes. Recording speed of 120 KB per sec.
BATTERIES  ES-DOS dedicated O.S.
POWER SUPPLY  Tree-phase current - 220/380V 100A
GUN  I/O Multiplexer ISOT 8401 for serial and Parallel peripherals

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