Pravetz computers
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Pravetz (series 8 and series 16) were Bulgarian computers, manufactured mainly in the town of Pravetz but also components and software were produced in Stara Zagora, Plovdiv and other.
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[edit] History
First Bulgarian personal computer IMKO-1, protopype of Pravetz computers was developed by Ivan Vassilev Marangozov,[1] often accused of cloning Apple II. Few first models were produced in ITKR (pronounced: i-tē-kā-rē) - Institute of technical cybernetics and robotics, BAS and later started industrial production.[2]
Pravetz computers were of major importance in Comecon.
[edit] Model line
[edit] 8-bit architecture
- IMKO-1 — First Bulgarian personal computer. Has a Intel 8080A/2 MHz CPU, and 16/4 Kb RAM/ROM. The storage media is a cassette recorder.
- Pravetz 82 (IMKO-2) - 82 is model year. BASIC interpreter, RAM/ROM - 48/12 Kb; CPU Synertek 6502 /1 MHz. The storage is improved due to one or (optional) two 5.25" floppy disk drive(s).
- Pravetz 8М - Integrated second CPU Zilog Z80A at 4 MHz can work with CP/M. The military version features integrated terminal design.
- Pravetz 8E - Industrial model based on the original Pravetz 82 architecture plus some memory extensions
- Pravetz 8А - Uses Bulgarian-made chipset СМ 630, memory could be expanded up to 1 Mb, accessible in 64Kb windows.
- Pravetz 8D - 8 bit home computer, uses TV instead of computer monitor. Not compatible with Pravetz 82 but inherits its architecture from the Oric home computers and compatible with their software
- Pravetz 8С - cut down 8А, 128Kb RAM integrated, but not expandable. Less number of slots, but integrated Centronics, FDD controlers, Joystick and sometimes with RS-232. A version of 8C is the Pravetz 8VC, which features terminal like design.
- Pravetz 8S - The most advanced from the series, 128Kb RAM integrated, exapandable to 1080KB. Less number of slots, but integrated Centronics, FDD controlers, Joystick and sometimes with RS-232. Could control 3.5" floppy disk drive and a 5MB HDD. Improved motherboard design with higher integration and support for various character sets.
[edit] 16-bit architecture
Pravetz-16 were IBM PC compatible:
- Pravetz-16 (IMKO-4) - Featured Intel 8086/8088 at 4Mhz. Simple motherboard design with Bulgarian chipset. Standard RAM 256KB or 512KB expandable to 640KB.
- Pravetz-16E
- Pravetz-16ES (variations as a desktop or tower box) - Featured the 80186 processor at 8Mhz.
- Pravetz-16A
- Pravetz-16T - Turbo version
- Pravetz-286
[edit] 32-bit architecture
- Pravetz-386
[edit] See also
[edit] References
- ^ (Bulgarian) Иван Василев Марангозов, pomagaloto.com, Материал № 54889, добавен на 9 декември 2007
- ^ (Bulgarian) The history... Factology surrounding Bulgarian microcomputers
