Commodore PC 128DData:
Processor: MOS 8502, 1,02 MHz for NTSC, 0,985 for PAL (in 80 columns mode: 2,02 MHz for NTSC and 1,97 MHz for PAL), second processor Zilog Z80A @ 4MHz for CP/M mode
ROM: 48 K
RAM: 128 K upgradeable to 512KB
Graphics: specialized chip VIC II 6569 and MOS 8563 for 640x200 pixels,16 colours
Music: specialized chip SID 6581, 3 mono channels
Music:1 x IEC (serial), 1 x Userport, 1 x Modulport, 1 x Audio/Video, 1 x RGBI, 1 x HF (Antena), 1 x Casette, 2 x Joystick, RS 232
There's also special GEOS version. Except for that thanks to CP/M system it's possible to run many professional programs on C128 (before PC and DOS this system was commonly used in offices).