Commodore 128 Programmer's Reference Manual page 14

COMMODORE 128
CP/M MODE u
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In CP/M Mode, an onboard Z80 microprocessor gives you access to the capabilities of U
Digital Research's CP/M Version 3.0, plus a number of new capabilities added by Commodore.
CP/M Mode features include: < ,
Integral Z80 processor running at 2.04 MHz *-J
Disk-based CP/M 3.0 System
128K bytes of RAM (in 64K banks) ) ]
40-column screen output using VIC II chip U
80-column screen output using 8563 chip
Access to the full keyboard, including the numeric keypad and special keys /
Access to the new fast serial disk drive (1571) and the standard serial peripherals jj
Ability to redefine almost any key
Ability to emulate several terminals (Lear-Siegler ADM31, ADM3A)
Support for various MFM disk formats (IBM, Kaypro, Epson, Osborne) }
RAM expansion to 256 or 640K RAM with optional RAM expansion modules ^
The incorporation of CP/M 3.0 (also called CP/M Plus) into the Commodore 128 H
makes thousands of popular commercial and public domain software programs available (J
to the user.
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HARDWARE COMPONENTS U
The Commodore 128 Personal Computer incorporates the following major hardware [J
components:
PROCESSORS [I
8502: Main processor in C128, C64 Modes; I/O support for CP/M; 6502 software-
compatible; runs at 1.02 or 2.04 MHz \ j
Z80: CP/M Mode only; runs at 2.04 MHz U
MEMORY I
ROM: 64K standard (C64 Kernal plus BASIC; C128 Kernal plus BASIC, character ^
ROMs and CP/M BIOS); one 32K slot available for software
RAM: 128K in two 64K banks; 16K display RAM for 8563 video chip; 2K X 4 Color RAM j t
VIDEO
8564: 40-column video (separate versions for NTSC and PAL TV standards) j
8563: 80-column video *->