Specifications
9 March 1999 – Subject To Change
System Address Space A–9
21164 Address Space
Figure A–4 21164 and DMA Read and Write Transactions
LJ-04868.AI4
000XX
0Size
313233343536373839 30
Physical
Address
00
0=Cached
Memory
Space
1=Noncached
I/O
Space
00.0000.0000
01.FFFF.FFFF
02.0000.0000
7F.FFFF.FFFF
00XXX 80.0000.0000
PCI Memory
Sparse Space
704MB Maximum
Reserved
8GB Cached
Memory
PCI I/O Sparse
Space — 64MB
Byte/Word PCI
Space — 16GB
PCI Memory Dense
Space — 4GB
PCI Configuration,
CIA CSRs, Flash ROM
83.FFFF.FFFF
0100X 84.0000.0000
86.FFFF.FFFF
0111X 87.0000.0000
87.FFFF.FFFF
8B.FFFF.FFFF
1000X 88.0000.0000
84.FFFF.FFFF
01010 85.0000.0000
01011 85.8000.0000
0110X 86.0000.0000