User`s guide

4.2 21164 Address Mapping to PCI Space
Table 4–7 PCI Configuration Space Definition
Bus Hierarchy PCI_AD Bits Definition
Local <31:24> Forced to 0 by the CIA chip.
<23:11> Can be used for IDSEL or ignored. Typically, the
IDSEL pin of each PCI device is connected to a
different address line. This requires that only one
bit of this field be asserted in a given cycle.
<10:8> Function select (1 of 8).
<7:2> Register select.
<1:0> 00
Remote
1
<31:24> Ignored—forced to 0 by the CIA chip.
<23:16> Bus number.
<15:11> Device number.
<10:8> Function select (1 of 8).
<7:2> Register select.
<1:0> 01
1
Communication is through a PCI/PCI bridge.
Table 4–8 defines the PCI configuration space byte-enable field encoding.
4–16 System Address Mapping