ZX Spectrum 128 was developed by Sinclair Research Limited., Released in 1986 New features included 128 KB RAM, three-channel audio via the AY-3-8912 chip, MIDI compatibility, an RS-232 serial port, an RGB monitor port, 32 KB of ROM including an improved [...]

Sinclair ZX81 was developed by Sinclair Research Limited., Released in 1981 A home computer built in the United Kingdom as the successor of the ZX80. Other Informations: * CPU: Zilog Z80A 3.5 MHz * RAM: 1 KB (901 bytes available, up to 64 KB) * ROM: 8 KB [...]

Sinclair ZX80 was developed by Sinclair Research Limited., Released in 1980 A home computer built in the United Kingdom. Other Informations: * CPU: NEC 780C-1 (Z80 compatible) 3.25 MHz * RAM: 1 KB, 901 bytes available (upgradeable to 64 KB) * ROM: 4 KB. [...]