Commodore 128 Programmer's Reference Manual page 541

n
THE COMMODORE 128 AND COMMODORE 64 MEMORY MAPS 531
f \
n
MEMORY
ADDRESS
LABEL
HEXADECIMAL DECIMAL
ADDRESS ADDRESS DESCRIPTION
C128 MEMORY MANAGEMENT UNIT, PRIMARY REGISTERS
IMPLEMENTS C128, C64, & CP/M 3.0 MODES
MMURCR
D506 54534
MMUVER
D50B 54539
RAM CONFIGURATION REGISTER
7-6
5-4
3-2
1-0
VIC RAM BANK (VA17 &
VA16)
RAM BLOCK (FOR FUTURE
EXPANSION)
RAM SHARE STATUS (NONE,
BOT, TOP, BOTH)
RAM SHARE AMOUNT (IK,
4K, 8K, 16K)
MMUPOL
MMUPOH
MMUP1L
MMUP1H
D507
D508
D509
D50A
54535
54536
54537
54538
PAGEO
POINTER LOW
PAGEO
POINTER HIGH
PAGE1
POINTER LOW
PAGE1
POINTER HIGH
SWAPS PAGEO
AND/OR PAGE1
WITH ANY
OTHER PAGE IN
THE 256K
ADDRESS SPACE
BITS ($D508 & $D50A)
7-4
3-2
1-0
A19-A18 (USED IN 1MB
SYSTEM)
A17-A16 (256K SYSTEM)
BITS ($D507 & $D509)
7-0 A15-A8
MMU VERSION NUMBER
3-0
BANK VERSION
MMU VERSION
VDCADR
C128 80-COLUMN VIDEO DISPLAY CONTROLLER
D600 54784 8563 ADDRESS REGISTER