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Hobbit (computer)

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Hobbit
Also known asХоббит (russian)
TypeHome computer
Release date1990; 34 years ago (1990)
Discontinued1993
Operating systemSinclair BASIC, Logo, CP/M, Forth
CPUclone of Zilog Z80 @ 3.5 MHz
Memory64 KB
Removable storageexternal 5.25" drives
DisplayComposite video out, EGA monitor
SoundBeeper
ConnectivityJoystick ports, Centronics, RS-232, audio in/out, system bus extension

Hobbit (Russian: Хоббит) is a Soviet/Russian 8-bit home computer, based on the ZX Spectrum hardware architecture. Besides Sinclair BASIC it also featured CP/M, Forth or LOGO modes, with the Forth or LOGO operating environment residing in an on-board ROM chip.[1]

Overview

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Hobbit was invented by Dmitry Mikhailov (Russian: Дмитрий Михайлов) (all R&D) and Mikhail Osetinskii (Russian: Михаил Осетинский) (management) in Leningrad, Russia in the late 1980s.[2] The original circuit layout was designed on a home-made computer (built in 1979 using ASMP of three KR580 chips - Soviet Intel 8080 clones), also created by Dmitry Mikhailov. The computer was manufactured by the joint venture InterCompex.[3][4]

Hobbit was marketed in the former Soviet Union as a low-cost personal computer solution for basic educational and office needs, in addition to its obvious use as a home computer. Schools would use it on the classrooms, interconnecting several machines and forming a 56K baud network. It was possible to use another Hobbit or a IBM PC compatible with a special Hobbit network adapter card by InterCompex as a master host on the network.

The Hobbit was also briefly marketed in the U.K., targeted mainly at the existing ZX Spectrum fans wanting a more advanced computer compatible with the familiar architecture. It was mentioned on Your Sinclair September 1990[1] and January 1991[3] issues; Crash April 1992[5] issue, and on Sinclair User August[6] and September 1992[7] issues, highlighting the available Forth language and CP/M operating system.

Domestic models often did not include the TV output, the internal speaker or both. The AY8910 chip for the domestic models was sold separately as an external extension module, hanging off the same extension bus as the optional external disk drive.[8]

Another extension was the SME (Screen and Memory Extension) board. This featured 32 KB of cache memory, some of which could be dedicated to a video text buffer in CGA mode (only supported by drivers in the FORTH or the CP/M environments; no known programs using the Sinclair-based BASIC mode used this feature). SME worked at astonishing speed - one machine code command made an output of an entire display line. SME was capable of rendering several dozens of windows per second, and its capabilities were fully utilized only in the Forth environment.

Technical details

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Source:[9]

  • Z80A at 3.5 MHz
  • 64K RAM
  • Disk drives: external 2 x 5.25" drives (up to 4 connectable) or internal 3.5" drive
  • Connections: joystick (2 x Sinclair, 1 x Kempston), Centronics, RS-232, audio in/out (for cassette recorder), system bus extension
  • 74-key keyboard (33 keys freely programmable)
  • Video output: Composite video TV out,[10] EGA monitor
  • Operating system: built in disassembler, CP/M clone called "Beta", system language switchable between English and Russian

References

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  1. ^ a b Pomfret, Keith (September 1990). "Hardware Rage Hard!". Your Sinclair. p. 37.
  2. ^ Khachaturov, Vassilii (2007-04-05). "Hobbit". Vassilii Khachaturov. Archived from the original on 2007-04-05. Retrieved 2023-02-15.
  3. ^ a b Pomfret, Keith (January 1991). "Hardware Rage Hard!". Your Sinclair. p. 73.
  4. ^ "Документация на Z80-совместимый компьют р "Хоббит"". 2007-08-24. Archived from the original on 2007-08-24. Retrieved 2022-12-30.
  5. ^ "Feature: Euro software!". Crash. April 1992. pp. 31–33.
  6. ^ "Feature: The Hobbit". Sinclair User. No. 126. August 1992. p. 19.
  7. ^ Specman (September 1992). "Feature: The Hobbit - Tested". Sinclair User. p. 23.
  8. ^ Walgenbach, Stefan. "Hobbit Personal Computer". HMC: The Home Computer Museum.
  9. ^ Slabihoud, Stephan (2013). "Sinclair – Nachbauten/Modelle". 8Bit-Museum.de (in German). Archived from the original on 2013-12-13.
  10. ^ Arn, Lift. "Sinclair Clones". Sinclair Nostalgia Products.
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