AMD-761 Datasheet, PDF (81/264 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
Bit Definitions
Bit Name
31-17 Reserved
16 BIU0_Present
15–8 FirstBusID
7–0 WHAMI
Programming Notes
Who Am I (WHAMI) (Dev0:F0:0x80)
Function
Reserved
BIU0 Present
This bit, when set, indicates that a processor is installed on the specified AMD Athlon™
processor system bus port on the AMD-761™ system controller and it has requested a
connect sequence (ProcRdy assertion).
First BusID
This field contains the AMD Athlon processor system bus ID of the first processor to read
this register:
00h if CPU0 was the first to read WHAMI after reset,
01h if CPU1 was the first to read WHAMI after reset.
Who Am I
This field returns the AMD Athlon processor system bus ID (below) of the processor that
accesses it:
00h for CPU0,
01h for CPU1.
Chapter 2
AMD-761™ System Controller Programmer’s Interface
69