Download Compaq AlphaPC 164LX Specifications

21164 Address Space
Figure A–5 System Address Map
Main Memory — 8GB
39 38
35 34 33
4 3
0
Memory Address
0 0 0 0 0 0
PCI Sparse Memory Space — 512MB Region 1
39 38
35 34 33
7 6
PCI Memory Address <28:2>
1 0 X 0 0 0
3 2
0
Size 0 0 0
PCI Sparse Memory Space — 128MB Region 2
39 38
7 6
35 34 33 32 31
PCI Memory Address <26:2>
1 0 X 0 0 1 0 0
3 2 1 0
Size 0 0 0
PCI Sparse Memory Space — 64MB Region 3
39 38
35 34 33 32 31 30
7 6
PCI Memory Address <25:2>
1 0 X 0 0 1 0 1 0
3 2 1 0
Size 0 0 0
PCI I/O Sparse Space — 32MB Region A
39 38
35 34 33 32 31 30 29
7 6
PCI I/O Address <24:2>
1 0 X 0 0 1 0 1 1 0
3 2 1 0
Size 0 0 0
PCI I/O Sparse Space — 32MB Region B
39 38
35 34 33 32 31 30 29
7 6
PCI I/O Address <24:2>
1 0 X 0 0 1 0 1 1 1
3 2 1 0
Size 0 0 0
PCI Memory Dense Space — 4GB
39 38
35 34 33 32 31 30 29
2 1 0
PCI Memory Address <31:2>
1 0 X 0 0 1 1 0
0 0
PCI Configuration Space
39 38
35 34 33 32 31
1 0 X 0 0 1 1 1
28 27
CSR
Space
7 6
Address
3 2 1 0
Size 0 0 0
LJ-05398.AI4
9 March 1999 – Subject To Change
System Address Space A–11