Ringo R470

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.

Sinclair computers, derivatives, and clones (ZX80/81, ZX Spectrum, and QL clones)

Sinclair Research / Science of Cambridge	MK14 ZX80 ZX81 ZX Spectrum (ZX Spectrum+, ZX Spectrum 128) QL

Timex Corporation	TS 1000 TS 1500 TS 2068 TC 2048 TC 2068 Komputer 2086

Amstrad	ZX Spectrum +2 ZX Spectrum +3

Cambridge Computer	Z88

Compatible or related systems	ATM MicroAce Jupiter Ace SAM Coupé Didaktik Dubna 48K Hobbit Pentagon Scorpion Sprinter One Per Desk CST Thor Q40/Q60 TK82C TK85 TK90X TK95

Sinclair Research peripherals	ZX Printer ZX Interface 1 ZX Interface 2 ZX Microdrive

Timex peripherals	TS2040 Printer TS2050 Modem FDD Disk Drive FDD3000 Disk Drive

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