Apply 300
DeveloperCDSE - Centro de Desenvolvimento de Sistemas Elétricos Ltda.
TypeHome computer
Release date1983; 41 years ago (1983)
Operating system8K Sinclair BASIC
CPUZ80 at 3.25 MHz
Memory32 to 48 KB
Removable storageAudio cassette
DisplayMonochrome TV; 32 x 24 characters, 64 x 48 using semigraphic symbols
SoundBeeper
Input69-key chiclet keyboard, cursor keys, numeric keypad
ConnectivityRS-232C serial port, Joystick port

The Apply 300 was a Brazilian clone of the Sinclair ZX81 introduced by CDSE - Centro de Desenvolvimento de Sistemas Elétricos Ltda.[1][2][3][4][5][6]

It came out in 1983, at a time where several clones of popular computers were introduced on the Brazilian market.[1][3] It competed with machines like the AS-1000, TK83, TK85, Ringo R470 or CP-200,[1] being considered today as a rare machine by computer museums.[7][8]

Features

General features of the Apply 300 match those of the original ZX81 machine, with a few enhancements.

The power supply was internal and the machine featured a Z80A processor at 3.25 MHz, 8K ROM and 32 or 48 KB of RAM.[6][1]

The keyboard was chiclet type, but offered 69 keys, including cursor keys and numeric keypad.[6][1]

It offered an expansion slot at the black, a RS-232C serial port and a joystick port.[6][1] There was a connection for a cassette tape recorder,[1] with the machine being able to load and save data into tapes at 300 baud.

The Apply 300 could be connected to a standard television over an RF out or composite video connection, providing a monochrome TV signal.[6] Graphics where the regular ZX81 text mode: 32 X 24 characters, with 64 x 44 semigraphics.

The machine was capable of producing simple beeper like sound effects.[6]

References

  1. ^ a b c d e f g Inojosa, Ricardo (February 1984). "Os Pequenos Notáveis". Micro Sistemas. pp. 32–40.
  2. ^ "cdSE Apply 300 – Revista Microsistemas – MCC - Museu Capixaba do Computador". museucapixaba.com.br (in Brazilian Portuguese). 2022-01-01. Retrieved 2023-04-13.
  3. ^ a b Cardi, Marilza (2002). Evolução da computação no Brasil e sua relação com fatos internacionais (PDF). Universidade Federal de Santa Catarina. pp. 132, 146.
  4. ^ Matthies, Gilberto. "Museu virtual dos microcomputadores de 1983". gilbertomatthies.tripod.com. Retrieved 2023-04-13.
  5. ^ "Planet Sinclair: Computers: Clones and variants: South American clones". rk.nvg.ntnu.no. Retrieved 2023-04-13.
  6. ^ a b c d e f "Apply 300: o mais profissional dos micros pessoais". Micro Sistemas. No. 22. July 1983. p. 85.
  7. ^ "HCM: most wanted items: South America". www.homecomputer.de. Retrieved 2023-04-14.
  8. ^ "Procura-se cdSE Apply 300 – Ajude o MCC a encontrar!". MCC - Museu Capixaba do Computador (in Brazilian Portuguese). 2021-01-01. Retrieved 2023-04-14.
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