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6,654 pages: 1,289 machines, 702 software, 460 companies, 64 history, 17 articles, 59 fun.
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

content/museum/isot-ec-1035.md

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+---
+title: ISOT EC-1035
+categories:
+- Computers
+types:
+- Professional Computer
+origins:
+- Bulgaria
+years:
+- '1977'
+cpus:
+- ES-2635
+params:
+  name: EC-1035
+  company: /companies/isot
+  company_name: ISOT
+  specs:
+  - label: NAME
+    value: EC-1035
+  - label: MANUFACTURER
+    value: ISOT
+  - label: TYPE
+    value: Professional Computer
+  - label: ORIGIN
+    value: Bulgaria
+  - label: YEAR
+    value: '1977'
+  - label: END OF PRODUCTION
+    value: Unknown
+  - label: BUILT IN LANGUAGE
+    value: None
+  - label: KEYBOARD
+    value: Terminal keyboard
+  - label: CPU
+    value: ES-2635 (?)
+  - label: SPEED
+    value: 160 000 operations per second
+  - label: RAM
+    value: 256 to 512 KB. 16 MB virtual memory max.
+  - label: ROM
+    value: BIOS in ROM, size unknown
+  - label: TEXT MODES
+    value: Depends on the terminal used
+  - label: GRAPHIC MODES
+    value: Graphic capabilities with some ISOT video terminals
+  - label: SIZE / WEIGHT
+    value: 100 square meters!
+  - label: BUILT IN MEDIA
+    value: Magnetic tapes. Recording speed of 120 KB per sec.
+  - label: OS
+    value: ES-DOS dedicated O.S.
+  - label: POWER SUPPLY
+    value: Tree-phase current - 220/380V 100A
+  - label: PERIPHERALS
+    value: I/O Multiplexer ISOT 8401 for serial and Parallel peripherals
+  tabs:
+  - photos
+  - hardware
+  photos:
+  - title: ISOT BROCHURE
+    subtitle: ''
+    text: ''
+    image: null
+  - title: OTHER ISOT SYSTEMS
+    subtitle: ''
+    text: |-
+      ISOT also made several 8-bit and 16-bit desktop computers, among them:\
+      • **1030C** 8086 based CAD system\
+      • **1031C** Z80 - CP/M system\
+      • **1039C** (also named CM-4) 16-bit multitasking system\
+      • **1036C** PC compatible system based on the Bulgarian CM688 processor, compatible with the Intel 8088. Here pictured with the **ISOT 6305C** 132-col. 150 cps dot-matrix printer.
+
+      Thanks to **Bojidar Stefanov**
+    image: null
+  hardware:
+  - title: ISOT 8015 MODEM
+    subtitle: ''
+    text: |-
+      4800-baud modem which was connected to several Bulgarian mainframes.
+
+      Thanks to **Bojidar Stefanov**
+    image: null
+  comments:
+  - author: oldboy
+    date: Thursday 22nd November 2012
+    text: |-
+      This was an IBM370 series compatible computer.\
+      We used it with IBM-DOS/VS-POWER system.
+  - author: Dave Witt (Canada)
+    date: Saturday 17th March 2012
+    text: Probably because EC in Cyrillic looks like ES in Latin alphabet
+  - author: Thomsonicus (Poland)
+    date: Wednesday 12th December 2007
+    text: hmm, the name says EC-1035 but the brochure states that it's a ES-1035... weird
+  - author: Linkman (Slovak Republic)
+    date: Friday 22nd April 2005
+    text: I wanna know how big is this computer ?
+  oc_id: 978
+  source:
+    url: https://web.archive.org/web/20230510155754/http://www.old-computers.com/museum/computer.asp?c=978
+    date: '2023-05-10'
+---
+
+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.
+
+<table> <tr> <td></td> <td>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.</td> <td></td> </tr> </table>