ISOT-1030C, ISOT-1031C, ISOT-1039C and ISOT 1036C - Bulgarian computers from the 80-ies.

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ISOT 1030C, 1031C, 1036C and 1039C

ISOT-1030C is a microsystem for computer aided design, based on i8086.

ISOT-1031C has for its CPU Z80.

ISOT-1039C (also named CM-4):

CPU: 16-bit specialized
RAM: 256KB, up to 1MB
HDD: 5MB
FDD: 2x500KB
Monitor: 960x240 pixels, 1-bit per pixel;
text modes - 24 rows x 80 symbols or 24 rows x 132 symbols
Communications: RS-232 at 9600 bps
Operational System: OS/PRO - multitask one-user OS.

PROFESSIONAL PERSONAL COMPUTER ISOT-1036C "Radio, television, electronics" magazine 9/85, bottom cover:

PROFESSIONAL PERSONAL COMPUTER ISOT-1036C
ISOT 1036C is a sixteen-bit professional personal computer, targetted for widely use in science-researching and enginnering organisations, universities, offices. Base configuration of ISOT 1036C includes Central Unit, two FDD EC5088M1, a keyboard, graphical monitor ISOT 7301C and matrix printer ISOT 6305C. Software of ISOT 1036C uses disk operating system DOS PC or the operational system MICROS-86. The software gives to the user also programming languages: BASIC, ASSEMBLER, FORTRAN, PASCAL and COBOL, a word processor, applications for financial planing, accounting and others.

Technical specifications
Central Unit: CPU: analogue of Intel 8086/8088 (I suppose Bulgarian one: CM688) Clock: 4.77MHz ROM: 48KB RAM: 128KB, up to 640KB
Graphical monitor ISOT 7301C colour of the screen: GREEN text format: 25x80 characters graphic mode: 640x200 pixels
Printer ISOT 6305C Speed: 150 chars/sec Characters per row: 132
FDD EC5088M1 Disk diamer: 133mm Capacity: 250KB Transfer rate: 250Kbit/s Writing method: MFM
Keyboard: Capital and small Cyrillic and Latin, 10 functional keys.

Producer: "Elektonika" factory, Sofia.

Note: "EC" is pronounced [es]. "ISOT" - [izot]

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