Ringo R470 - Wikipedia

Ringo R470 was a Brazilian clone of the Sinclair ZX81 by Ritas do Brasil. It has a Z80A at 3.25 MHz, 8K ROM and 16 KB RAM. It wasn't 100% compatible with the ZX81.

v t e Sinclair computers, derivatives, and clones
Sinclair Research / Science of Cambridge	MK14 ZX80 ZX81 ZX Spectrum (ZX Spectrum+, ZX Spectrum 128) QL
Amstrad	ZX Spectrum +2 ZX Spectrum +3
Licenced systems	ZX Spectrum Vega ZX Spectrum Vega+
Timex Corporation	T/S 1000 T/S 1500 T/S 2068 (TC 2068) TC 2048 TC 3256
Cambridge Computer	Z88
Lists of clones	ZX80/81 clones ZX Spectrum clones QL clones
Compatible or related systems	ZX80 based: MicroAce, TK80, NE-Z80 ZX81 based: Apply 300, AS-1000, Lambda 8300, CP-200, CZ 2000, CZ 1000, CZ 1500, CZ 1000 Plus, CZ 1500 Plus, CZ Spectrum, NE-Z8000, Ringo R-470, TK82C, TK83, TK85 ZX Spectrum based: ATM, Pentagon, CZ Spectrum Plus, Didaktik, Dubna 48K, Hobbit,Scorpion ZS-256, Sprinter, Kay 1024, Komputer 2086, TK90X, TK95, Robik, ZX Spectrum Next QL based: CST Thor, One Per Desk, Q40/Q60 Other: SAM Coupé, Jupiter Ace
Sinclair Research peripherals	ZX Printer ZX Interface 1 ZX Interface 2 ZX Microdrive
Timex peripherals	TS2040 Printer Neptun 156 Monitor TS2050 Modem FDD Disk Drive FDD3000 Disk Drive
Other peripherals	Beta Disk Interface DISCiPLE MB02 Rotronics Wafadrive Multiface Kempston Currah SpecDrum RAM Music Machine Stack Light Rifle Magnum Light Phaser
People	Clive Sinclair John Pemberton Rick Dickinson Richard Altwasser Steve Vickers

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