Commodore 128 Programmer's Reference Manual page 593

C128 HARDWARE SPECIFICATIONS 583
THE MEMORY
p MANAGEMENT UNIT (MMU)
The MMU is designed to allow complex control of the C128 system memory resources.
P| Because of the way it handles all the standard C64 modes of operation, it is completely
I 1 compatible with the C64. Additionally, it controls the management of particular C128
modes including the Z80 mode. The MMU's features include:
*-^
I } ■ Generation of translated address bus (TA8-TA15).
■ Generation of control signals for different processor modes (C128, C64, Z80).
■ Generation of CAS selects lines for RAM banking.
j j ■ Generation of ROMBANK lines for ROM banking.
Programming the MMU is described in detail in Chapter 13.
i I PHYSICAL DESCRIPTION
p Many of the MMU input and output signals have been discussed informally so far.
j This section contains descriptions of the MMU as a physial 48-pin device, includ
ing a description of all pin requirements, input and output signals, and electrical
requirements.
! PIN REQUIREMENTS
Table 16-9 lists the required MMU pins, indicating the number in each signal category
p* and the total number.
n