LSI53C875 LSI Logic, LSI53C875 Datasheet - Page 75

• Manufacturer Part Number: LSI53C875
• Description: PCI to Ultra SCSI I/O Processor
• Manufacturer: LSI Logic

3.3 Configuration Registers
The Configuration registers are accessible only by the system BIOS
during PCI configuration cycles. The lower 128 bytes hold configuration
data while the upper 128 bytes hold the LSI53C875 operating registers,
which are described in
registers are accessed by SCRIPTS or the host processor, if necessary.
Table 3.2
LSI53C875/875E.
All PCI-compliant devices, such as the LSI53C875, must support the
Vendor
PCI-compliant registers is optional. In the LSI53C875, registers that are
not supported are not writable and returns all zeros when read. Only
those registers and bits that are currently supported by the LSI53C875
are described in this chapter. For more detailed information on PCI
registers, please see the PCI Specification.
Configuration Registers
Note:
ID,
shows the PCI configuration registers implemented by the
Device
The configuration register descriptions provide general
information only, to indicate which PCI configuration
addresses are supported in the LSI53C875. For detailed
information, refer to the PCI Specification.
ID, Command, and
Chapter 5, “SCSI Operating Registers.”
Status
registers. Support of other
These
3-11