Service manual

1-20 AlphaServer GS80/160/320 Service Manual
1.7.4 Addressing
The CPU chip and the rest of the system have slightly different
formats.
Table 1– 1 Address Ranges Seen at the CPU
Home QBB Memory Space Address I/O Space Address
0 000.0000.0000 - 00f.ffff.ffff ff0.0000.0000 - fff.ffff.ffff
1 010.0000.0000 - 01f.ffff.ffff fe0.0000.0000 - fef.ffff.ffff
2 020.0000.0000 - 02f.ffff.ffff fd0.0000.0000 - fdf.ffff.ffff
3 030.0000.0000 - 03f.ffff.ffff fc0.0000.0000 - fcf.ffff.ffff
4 040.0000.0000 - 04f.ffff.ffff fb0.0000.0000 - fbf.ffff.ffff
5 050.0000.0000 - 05f.ffff.ffff fa0.0000.0000 - faf.ffff.ffff
6 060.0000.0000 - 06f.ffff.ffff f90.0000.0000 - f9f.ffff.ffff
7 070.0000.0000 - 07f.ffff.ffff f80.0000.0000 - f8f.ffff.ffff
Table 1– 2 Address Ranges Seen in the System
Home QBB Memory Space Address I/O Space Address
0 000.0000.0000 - 00f.ffff.ffff 800.0000.0000 - 80f.ffff.ffff
1 010.0000.0000 - 01f.ffff.ffff 810.0000.0000 - 81f.ffff.ffff
2 020.0000.0000 - 02f.ffff.ffff 820.0000.0000 - 82f.ffff.ffff
3 030.0000.0000 - 03f.ffff.ffff 830.0000.0000 - 83f.ffff.ffff
4 040.0000.0000 - 04f.ffff.ffff 840.0000.0000 - 84f.ffff.ffff
5 050.0000.0000 - 05f.ffff.ffff 850.0000.0000 - 85f.ffff.ffff
6 060.0000.0000 - 06f.ffff.ffff 860.0000.0000 - 86f.ffff.ffff
7 070.0000.0000 - 07f.ffff.ffff 870.0000.0000 - 87f.ffff.ffff