Ringo R470

Ringo R-470 was a Brazilian clone of the Sinclair ZX81 by Ritas do Brasil Ltda. introduced in 1983.[1][2][3][4][5][6][7][8] It featured a Z80A processor at 3.25 MHz, 8K ROM and 16 KB RAM.[9][10] It wasn't 100% compatible with the ZX81, and some BASIC tokens have alternate codings.[1]

Ringo R-470
DeveloperRitas do Brasil Ltda
TypeHome computer
Release date1983 (1983)
Introductory priceCr$ 449,950.00
Operating system8K Sinclair BASIC
CPUZ80 at 3.25 MHz
Memory16 KB
Removable storageAudio cassette
DisplayMonochrome TV; 32 x 24 characters, 64 x 48 using semigraphic symbols

The machine had a price of Cr$449,950,[9] higher than competitor computers like the TK85 that costed Cr$369,850,[9] and it was not successful.

This computer can be emulated on modern systems under EightyOne Sinclair Emulator or MAME.[11][12]

References
  1. "Trying Out the Ringo R-470, a Brazilian ZX-81 Clone - Code, Strings, and Keys". 2021-09-22. Retrieved 2023-01-05.
  2. "O Ringo R-470". Datassette (in Brazilian Portuguese). 2018-11-12. Retrieved 2023-01-05.
  3. "Ringo R470". Spectrum Computing.
  4. Woodcock, Colin (2012-05-07). The ZX Spectrum on Your PC. Lulu.com. ISBN 978-1-4716-9612-1.
  5. "Computadores & Comunicações". Jornal do Brasil (in Brazilian Portuguese). May 20, 1985. p. 15.
  6. "Micro R-470 Ringo - ZX81". COB-Clube Old Bits (in Brazilian Portuguese). 2005. Archived from the original on 2015-10-30. Retrieved 2023-01-11.
  7. 14.° CONEX - FORMAÇÃO E CATALOGAÇÃO DO ACERVO DO MUSEU DA COMPUTAÇÃO DA UEPG (PDF) (in Brazilian Portuguese). 2016. p. 5.
  8. Manual de Operação do Microcomputador R-470 Ringo (PDF) (1 ed.). Ritas do Brasil. 1983.
  9. "Ringo R470 advert". Micro Sistemas (in Brazilian Portuguese). May 1984. p. 43.
  10. "ZX81 Clones from Ritas do Brazil". Kio's Sinclair ZX Computers Archive. Retrieved 2023-01-11.
  11. "EightyOne Sinclair Emulator". SourceForge. Retrieved 2023-02-15.
  12. Motoschifo. "Ringo 470 - MAME machine". adb.arcadeitalia.net (in Italian). Retrieved 2023-02-15.


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