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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 computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.
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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
TYPE  Professional Computer
ORIGIN  Bulgaria
YEAR  1977
KEYBOARD  Terminal keyboard
CPU  ES-2635 (?)
SPEED  160 000 operations per second
RAM  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.
OS  ES-DOS dedicated O.S.
POWER SUPPLY  Tree-phase current - 220/380V 100A
PERIPHERALS  I/O Multiplexer ISOT 8401 for serial and Parallel peripherals

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