Pravetz (computer) explained

Pravetz
Native Name:Правец
Native Name Lang:bg
Type:Public
Founder:engineer Ivan Vasilev Marangozov
Location:Pravets, Bulgaria, near Sofia, Bulgaria
Area Served:Bulgaria
Industry:Computer hardware
Electronics
Products:Desktops, servers, notebooks, netbooks

Pravetz is a brand of personal computers produced in Bulgaria from 1979. They were widely used in scientific organizations and schools until the 1990s.[1]

Pravets were the first personal computers made in Bulgaria. Before that, various types of large computer systems were used, the size of rooms (60-70), as well as even lamp computers before that. The name of the Pravet computers specifies that these are personal computers "made" (in Bulgarian language: правя, pravja) in Bulgaria.[2] [3]

They were manufactured in the town of Pravetz,[4] with some components and software being produced in other towns as Sofia, Plovdiv, Stara Zagora and other Bulgarian cities.

Pravetz computers are still in use in some schools for beginner students in computing because they are adapted in manufacturing for educational purposes.

Bulgaria was the leading manufacturer, with its leading trademark Pravetz, of computer and peripherals electronics for the socialist economic union COMECON in 20th century.

History

An early Bulgarian-made personal computer was IMKO-1 (its name resembles Bulgarian name ELKA (short name for ELektronen KAlkulator, cirillic ЕЛКА ЕЛектронен КАлкулатор) or calculator, yet the name of the first state-manufactured personal computers points to its production as a PC or Pravetz Computers (правя, pravja - make, manufacture)). The prototype of the Pravetz computers that were developed by engineer Ivan Vassilev Marangozov,[5] who was rightfully accused of cloning the Apple II. In fact, IMKO-1 was a nearly identical clone of the original Apple II with a few minor exceptions - case, keyboard, character table (the lowercase Latin alphabet was replaced with Cyrillic uppercase) and power supply (early models used bulky and heavy linear power supplies). A few early models were produced at the ITKR (pronounced ee-teh-kah-reh, Institute of Technical Cybernetics and Robotics), a section of the Bulgarian Academy of Sciences. Industrial production in Pravetz started shortly after.[6]

The line of Bulgarian personal computers at the time of release was prohibitively expensive for individuals and in addition were only sold to different government institutions - educational sector, military and administrative sector.

Pravetz computers were of major importance in the economy of the Comecon.

Model line

8-bit architecture

Except for the Oric-derived 8D (and possibly the IMKO-1), all the Pravetz 8-bit systems are largely compatible with the popular Apple II and its successors, with the exception that they offer Cyrillic fonts and some other improvements compared to Apple.

Before Pravetz were IMKO-1 (IMKO-2) — According to some computer users, IMKO was the very first Bulgarian personal computer, its name resembles the ELKA name for calculator. It used a clone of the MOS Technology 6502 CPU running at 1 MHz and 16/4 KB of RAM/ROM. The storage media is a cassette recorder. It had a metal case and very large and heavy linear power supply. The ROM was an exact copy of the Apple II ROM (the only change was the name).

16-bit architecture

Pravetz-16 were IBM PC compatible:

32-bit architecture

Revival in 2014

The brand was revived in 2014 by Pravetz Computers OOD, a private company that organised assembly of personal computers with Intel-based CPU.[7]

See also

External links

Notes and References

  1. С. Бычваров, П. Павлов. Авторская система для микрокомпьютера "Правец-16". Математика и математическо образование, БАН, 1991, 190-194
  2. "The processing was carried out in single precision on a Pravetz 16, a Bulgarian IBM-XT compatible PC computer." Jaroslav Nadrchal, Robert A De Groot, Physics Computing '92: Proceedings Of The 4th International Conference, World Scientific, 12 May 1993
  3. Stancho Dimiev, Kouei Sekigawa, Complex Structures And Vector Fields, World Scientific, June 28, 1995
  4. http://www.wfnmc.org/hilkuczma.html Conference at Pravetz, Bulgaria, in July 1994
  5. Иван Василев Марангозов, pomagaloto.com, Материал № 54889, добавен на 9 декември 2007
  6. The history... Facts concerning Bulgarian microcomputers
  7. Web site: Bulgarian PC Brand Pravetz to Start Selling Laptops in January - Novinite.com - Sofia News Agency. 12 January 2021. www.novinite.com.