Subsystem id access, Subsystem id, Access – Avago Technologies LSI53C895A User Manual
Page 126: Data, Bridge support exten, Sions (pmcsr_bse), Subsystem, Id access, Register: 0x46, Register: 0x47
4-18
Registers
Register: 0x46
Bridge Support Extensions (PMCSR_BSE)
Read Only
BSE
Bridge Support Extensions
[7:0]
This register indicates PCI Bridge specific functionality.
The LSI53C895A does not support extensions and
always returns 0x00.
Register: 0x47
Data
Read Only
DATA
Data
[7:0]
This register provides an optional mechanism for the
function to report state-dependent operating data. The
LSI53C895A does not use this register and always
returns 0x00.
Registers: 0x48–0x4B
Subsystem ID Access
Write Only
SIDA
Subsystem ID Access
[31:0]
The Subsystem ID Access register is the PCI
configuration space at offset 0x48–0x4B. Once enabled
and unlocked, this register can be used to shadow
Subsystem Vendor ID/Subsystem ID data into the
appropriate PCI Subsystem registers, thus eliminating the
need for a serial EEPROM to store the data. For
7
0
BSE
0
0
0
0
0
0
0
0
7
0
DATA
0
0
0
0
0
0
0
0
31
0
SIDA
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1