AMD-761 Datasheet, PDF (32/264 Pages) Advanced Micro Devices – AMD-761-TM System Controller Software/BIOS Design Guide

Preliminary Information
AMD-761™ System Controller Software/BIOS Design Guide
24081D—February 2002
2.4.1
I/O Register Map
The AMD-761 system controller implements some I/O registers
(accessed by processor I/O instructions). These registers, as
presented in Table 5, are the Configuration Address and
Configuration Data registers as specified in PCI Local Bus
Specification, Revision 2.2.
Table 5. I/O Register Map
Register
Configuration Address
Configuration Data
AMD Athlon™ Processor System Bus
Address
SysAddOut MSB =0 &
1 FC000 0CF8
SysAddOut MSB =0 &
1 FC000 0CFC
Reference
“I/O:0CF8” on page 21 and “I/O:0CF8” on
page 23
“I/O:0CFC” on page 25
20
AMD-761™ System Controller Programmer’s Interface
Chapter 2