User`s guide

Table C–3 (Cont.) SIO PCI-to-ISA Bridge Configuration Address Space Map
Offset Address Register
80–81 1 E008 1008 BIOS timer base address register
C.6 PCI Sparse Memory Address Space
The PCI sparse memory address space comprises an address range from
2 0000 0000 through 2 7FFF FFFF.
C.7 PCI Dense Memory Address Space
The PCI dense memory address space comprises an address range from
3 0000 0000 through 3 FFFF FFFF.
C.8 PC87312 Combination Controller Register Address
Space
Table C–4 lists the base address values for the PC87312 combination diskette,
serial port, and parallel port controller.
The general registers are located at addresses 398 (index address) and 399
(data address). For example, writing an index value of 1 to address 398
selects the function address register. If a read transaction from address 399
follows, the data associated with the function address register is returned. If a
write transaction to address 399 follows, the function address register will be
updated.
PCI Address Maps C–7