AMD-761 Datasheet, PDF (23/264 Pages) Advanced Micro Devices – AMD-761-TM System Controller Software/BIOS Design Guide

24081D—February 2002
Preliminary Information
AMD-761™ System Controller Software/BIOS Design Guide
For reference, the x86 view of memory from the perspective of
the AMD Athlon processor and the mapping to the Socket2000
memory map is shown in Figure 2.
I/O Space
CF8, CFC
x86 In and Out Address Space
Note: Not to scale.
APIC Registers
PCI Memory
Reserved
(BAR0)
TOM
AGP Virtual
Reserved
GART
Extended
Memory
Reserved
PCI Config
PCI I/O
PCI IACK/Special
PCI Memory
BIOS
VGA
DOS Memory
640–1-Mbyte addresses are sent to PCI
or DRAM as a function of AMD Athlon^TM
processor MSRs.
DRAM
Figure 2.
x86 Memory Address Space
Socket2000 Address Space
AMD Athlon™ Processor Family x86 Processor Address Mapping
Chapter 2
AMD-761™ System Controller Programmer’s Interface
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