Commodore 128 Programmer's Reference Manual page 544

534 COMMODORE 128
C128 Memory Map (continued)
MEMORY
ADDRESS
LABEL
D2PRB
DMAST
HEXADECIMAL DECIMAL
ADDRESS ADDRESS DESCRIPTION
DD01
DFOO
56577
D2DDRA
D2DDRB
D2T1L
D2T1H
D2T2L
D2T2H
D2TOD1
D2TODS
D2TODM
D2TODH
D2SDR
D2ICR
D2CRA
D2CRB
101
IO2
DD02
DD03
DD04
DD05
DD06
DD07
DD08
DD09
DDOA
DDOB
DDOC
DDOD
DDOE
DDOF
DEOO
DFOO
56578
56579
56580
56581
56582
56583
56584
56585
56586
56587
56588
56589
56590
56591
56832
57088
57088
PORT B, USER PORT, RS-232
BITS
0
1
2
3
4
5
6
PRBO : USER PORT / RS-232
RECEIVED DATA
PRB1 : USER PORT / RS-232
REQUEST TO SEND
PRB2 : USER PORT / RS-232
DATA TERMINAL READY
PRB3 : USER PORT / RS-232
RING INDICATOR
PRB4 : USER PORT / RS-232
CARRIER DETECT
PRB5 : USER PORT
PRB6 : USER PORT / RS-232
CLEAR TO SEND
PRB7 : USER PORT / RS-232
DATA SET READY
DATA DIRECTION PORT A
DATA DIRECTION PORT B
TALO
TA HI (TIMER A)
TBLO
TB HI (TIMER B)
TOD (TENTHS)
TOD (SECONDS)
TOD (MINUTES)
TOD (HOURS)
SERIAL DATA REGISTER
INTERRUPT CONTROL REGISTERS
(NMTS)
CONTROL REGISTER A
CONTROL REGISTER B
EXPANSION I/O SLOT (RESERVED)
EXPANSION I/O SLOT (RESERVED)
C128 DMA CONTROLLER FOR
EXPANSION RAM ACCESS
OPTIONAL DEVICE MAPPED INTO
IO2 BLOCK VIA SYSTEM
EXPANSION PORT (PRELIMINARY)
DMA CONTROLLER STATUS
REGISTER (READ ONLY)
u
U
I!
LJ
U
u
u