Specifications

B–10 I/O Space Address Maps
Subject to Change – 17 January 1997
PCI Dense Memory Space
B.3 PCI Dense Memory Space
PCI dense memory space occupies physical addresses 86.0000.0000 through
86.FFFF.FFFF, and is typically used for PCI data buffers (such as a video frame
buffer). Refer to Section A.3.1 for additional information on PCI dense memory
space.
B.3.1 Flash ROM Memory Addresses
Table B–6 lists the address range for the flash ROM. Refer to Section B.2.1.2 for
details on selecting one of two flash ROM segments.
428–42B 85.C000.8518 CH2 scatter/gather descriptor table pointer
42C–42F 85.C000.8598 CH3 scatter/gather descriptor table pointer
434–437 85.C000.8698 CH5 scatter/gather descriptor table pointer
438–43B 85.C000.8718 CH6 scatter/gather descriptor table pointer
43C–43F 85.C000.8798 CH7 scatter/gather descriptor table pointer
481 85.C000.9020 DMA CH2 high page
482 85.C000.9040 DMA CH3 high page
483 85.C000.9060 DMA CH1 high page
487 85.C000.90E0 DMA CH0 high page
489 85.C000.9120 DMA CH6 high page
48A 85.C000.9140 DMA CH7 high page
48B 85.C000.9160 DMA CH5 high page
4D6 85.C000.9AC0 DMA2 extended mode
Table B–6 Flash ROM Memory Addresses (Within Segment)
Offset Physical Address Capacity
0.0000–7.FFFF 86.FFF8.0000–86.FFFF.FFFF 512KB
Table B–5 (Continued) SIO Bridge Operating Register Address Space Map
Offset Address Register