Processor 6502C Clock speed 1.79 MHz (NTSC) 1.77 MHz (PAL) RAM 64 KB ROM 16 KB Release year 1987 Production stopped ??? O.S. version(s) XL O.S. Cartridge port(s) 1 Adress space : 16 KB Built-in software Missile Command Controller port(s) 2 Function keys Reset, option, select, start, help, Parallel Bus Interface No Cosmetics Grey casing. Diagonal printboard inside Additional Standard configuration does not include a keyboard. ( It's a gaming system :-) A seperate keyboard can be bought, hence the functions keys are NOT on the keyboard but on the computer itself.