AS-1000

The AS-1000 was a Brazilian clone of the Sinclair ZX81 introduced by Engebrás Eletrônica e Informática Ltda in October 1983.[1][2][3][4][5][6][7][8] The main differences regarding the ZX81 are the internal power supply and larger RAM. The machine had an initial retail price of Cr$ 195 000.[3]

ManufacturerEngebrás Eletrônica e Informática Ltda
TypeHome computer
Release dateOctober 1983 (1983-10)
Introductory priceCr$ 195 000
Operating systemSinclair BASIC
CPUZ80 at 3.25 MHz
Memory16 KB (64 KB max.)
DisplayMonochrome display on television; 24 lines × 32 characters; 64 × 48 pixels semigraphics mode
Backward
compatibility		ZX81

The computer came with 16 KB of RAM, but could be fitted with 32 or 48.[1] There were 8KB of ROM and a 40-key membrane keyboard.[1][9] A regular TV set was used as monitor, with the computer displaying 32 x 22 text characters in monochrome. By using semigraphic characters, it was possible to simulate a 64 x 44 resolution display.

There was one expansion slot at the back of the machine, with the TV RF-out, audio in/out and joystick ports located at the side.[4][10][1] Storage was by means of audio cassette, with a data transfer speed of 300 bauds.

References
  1. Velasco, Marcos (2023). "Engebrás AS-1000". MV - Marcos Velasco Software. Retrieved 2023-03-19.
  2. "AS-1000 advert". Micro Sistemas. January 1984. Archived from the original on 2018-10-01.
  3. Inojosa, Ricardo (February 1984). "Os Pequenos Notáveis". Micro Sistemas. pp. 32–40.
  4. "Micro AS1000 - ZX81". Clube Old Bits. 2008-06-11. Archived from the original on 2008-06-11. Retrieved 2023-01-16.
  5. Cardi, Marilza (2002). Evolução da computação no Brasil e sua relação com fatos internacionais (PDF). Universidade Federal de Santa Catarina.
  6. "AS-1000 - ROMs". Datassette (in Brazilian Portuguese). 2021-12-16. Retrieved 2023-03-19.
  7. "General info for: AS-1000". Spectrum Computing.
  8. Barboza, Cícero (1987). Política nacional de informática: 1971 - 1987 (PDF). Universidade Federal de Santa Catarina. p. 41.
  9. "Museu virtual dos microcomputadores de 1983". Gilberto M. Retrieved 2023-03-07.
  10. "AS-1000". World Of Spectrum Classic. Retrieved 2023-03-19.
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