Processor 6502C Clock speed 1.79 MHz (NTSC) 1.77 MHz (PAL) RAM 64 KB ROM 24 KB Release year 1985 Production stopped ??? O.S. version(s) XL O.S. Cartridge port(s) 1 Adress space : 16 KB Built-in software Self-Test Basic Revision C Controller port(s) 2 Function keys Reset, option, select, start, help, Parallel Bus Interface No Cosmetics Grey casing, PC-Style key stroke