7 Manufacturer : Acorn Computers Year of Release : 1981 OS : Acorn MOS Units sold : 1.5 million CPU : MOS Technology 6502/6512 @ 2 MHz RAM : 16 KB to 128 KB depending on model Graphics : 640x256 pixels, 8 colours Sound : TI SN76489, 4 channels + TMS5220 speech synthesiser Media : Cassette tape, floppy disk