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Figure 1–4 21164 and DMA Read and Write Transactions
39
38
37
36
35
34
33
32
Size
0
000XX
0=Cached
Memory
Space
00XXX
0100X
01010
1=Noncached
I/O
01011
Space
0110X
0111X
1000X
31
30
21164 Address Space
00
00.0000.0000
8GB Cached
Memory
01.FFFF.FFFF
02.0000.0000
Reserved
7F.FFFF.FFFF
80.0000.0000
PCI Memory
83.FFFF.FFFF
Sparse Space
84.0000.0000
704MB Maximum
84.FFFF.FFFF
85.0000.0000
85.8000.0000
PCI I/O Sparse
Space — 64MB
86.0000.0000
PCI Memory Dense
Space — 4GB
86.FFFF.FFFF
87.0000.0000
PCI Configuration,
CIA CSRs, Flash ROM
87.FFFF.FFFF
88.0000.0000
Byte/Word PCI
Space — 16GB
8B.FFFF.FFFF
System Address Space
Physical
Address
LJ-04868.AI4
A–9
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