Publication No. 500-9300875565-000 Rev. C.0
Programming 41
NOTE
While examining the contents of the PCI Configuration Registers, the user may notice that Base Address
Register 4 contains a non-zero value and may mistakenly believe that this value specifies a set of useful
functions. Actually the registers within Base Address Register 4 are a set of special diagnostic registers
for the PLD Applications PCI-X core. These registers should be considered reserved and remain
unaltered by the user.
*
NOTE
: This register will be altered by the system BIOS during the system boot
process.
Table 3-15 PCI Base Address Register 4
PCIBAR4: Offset $20
Bit
Description
Read
Write
Value
after
PCI
Reset
31:0
Reserved
.
Yes
No
$0
Table 3-16 PCI Base Address Register 5
PCIBAR5: Offset $24
Bit
Description
Read
Write
Value
after
PCI
Reset
31:0
Reserved
.
Yes
No
$0
Table 3-17 PCI Cardbus CIS Pointer Register
PCI Cardbus CIS Pointer: Offset $28
Bit
Description
Read Write
Value
after
PCI
Reset
31:0
Cardbus Information Structure Pointer for PCMCIA
.
Not Supported.
Yes
No
$0
Table 3-18 PCI Subsystem Vendor ID Register
PCI Subsystem Vendor ID: Offset $2C
Bit
Description
Read Write
*Value
after
PCI Reset
15:0
Subsystem Vendor ID (unique add-in
board Vendor ID).
Yes
No
$1556
*
NOTE
: The value $1556 denotes a PLD Application.
Table 3-14 PCI Base Address Register 3 for Access to Reflective Memory (Continued)
PCIBAR3: Offset $1C
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