Processor 6502C Clock speed 1.79 MHz (NTSC) 1.77 MHz (PAL) RAM 64 KB ROM 16 KB Release year 1982 Production stopped ??? O.S. version(s) XL O.S. Cartridge port(s) 1 Adress space : 16 KB Built-in software Diagnostic Controller port(s) 2 Function keys Reset, option, select, start, help, F1, F2, F3, F4 Parallel Bus Interface No Cosmetics Large black and white casing