IBM PowerPC 405GP User Manual

3.3.9 Indirect Access of Decompression Controller DCRs
The following procedure accesses the decompression controller DCRs listed in Table 3-11.
1. Write the offset from
Table 3-12 to the Decompression Controller Address Register
(DCPO_CFGADDR).
2. Read data from
or write data to the Decompression Controller Data Register (DCPO_CFGDATA).
Table 3-11. Decompression ,Controller DCR Usage
DCR
Register
Number Access
Description
DCPO_CFGADDR
Ox014 RIW
Decompression Controller Address Register
DCPO_CFGDATA
Ox015 RIW
Decompression Controller Data Register
Table 3-12. Offsets for Decompression Controller Registers
Register
Offset
RIW
Description
DCPO_ITORO
OxOO RIW Index Table Origin Register 0
DCPO_ITOR1
Ox01 RIW Index Table Origin Register 1
DCPO_ITOR2
Ox02 RIW Index Table Origin Register 2
DCPO_ITOR3
Ox03 RIW Index Table Origin Register 3
DCPO_ADDRO
Ox04 RIW Address Decode Definition Register 0
DCPO_ADDR1
Ox05 RIW
Address Decode Definition Register 1
DCPO_CFG
Ox40 RIW
Decompression Controller Configuration Register
DCPO_ID
Ox41 R Decompression Controller 10 Register
DCPO_VER
Ox42 R Decompression Controller Version Number
Register
DCPO_PLBBEAR
Ox50 R Bus Error Address Register (PLB address)
DCPO_MEMBEAR
Ox51 R Bus Error Address Register (DCP to EBC
address)
DCPO_ESR
Ox52
R/Clear
Bus Error
Status Register 0 (masters 0-3)
DCPO_RAMQ-
Ox400-0x7FF
RIW
Decode Tables
DCPO_RAM3FF
Preliminary Programming
Model 3-21

IBM PowerPC 405GP Specifications

General

Brand	IBM
Model	PowerPC 405GP
Category	Computer Hardware
Language	English