Commodore PC 128

Data:
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
Ports: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

Modes:
Mode C64: Software - Hardware compatible with C64, 64KB RAM, 20KB ROM, 6510 compatible microprocessor, 40x25 chars, graphics 320x200 pixels, 16 colours, 8 sprites
Mode C128: 128KB RAM, 48KB ROM, 16KB DOS, 122KB free for Basic v7.0, system monitor, 40 columns mode 40x25 chars; 80 columns mode 80x25 chars; graphics 320x200 or 640x200 pixels (640x480 - hacked mode), 16 colours, 8 sprites
Mode CP/M: 128KB RAM, CP/M plus v3.0, 40/80x25 chars, 320/640x200 pixels, 16 colours, sprites. 

            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).