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Sinclair ZX81

Manufacturer: Timex Corporation

Developer: Sinclair Research

Media Medium: Cassette tape

CPU: Z80 @ 3.25 MHz

Memory: 1 KB (64 KB max. 56 KB usable)

Graphics: 24 lines × 32 characters or 64 × 48 pixels graphics mode

Display: Monochrome display on UHF television