User`s guide

PCI Address Maps

This appendix provides the AlphaPC64 PCI operating register address space

maps.

C.1 PCI Interrupt Acknowledge/Special Cycle Address Space

The PCI interrupt acknowledge/special cycle address space comprises an

address range from 1 B000 0000 through 1 BFFF FFFF.

C.2 PCI Sparse I/O Address Space

The PCI sparse I/O address space ranges from 1 C000 0000 to 1 DFFF FFFF.

The PCI operating register set occupies this space.

C.3 SIO PCI-to-ISA Bridge Operating Register Address Space

Table C–1 is a map of the Saturn IO (SIO) chip PCI-to-ISA bridge operating

address space.

Table C–1 SIO PCI-to-ISA Bridge Operating Register Address Space Map

Offset Address Register

000 1 C000 0000 DMA1 CH0 base and current address register

001 1 C000 0020 DMA1 CH0 base and current count register

002 1 C000 0040 DMA1 CH1 base and current address register

003 1 C000 0060 DMA1 CH1 base and current count register

004 1 C000 0080 DMA1 CH2 base and current address register

005 1 C000 00A0 DMA1 CH2 base and current count register

006 1 C000 00C0 DMA1 CH3 base and current address register

(continued on next page)

PCI Address Maps C–1