AMD-761 Datasheet, PDF (225/264 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
Registers
-----
Bits
0x0x0x00h
31:16
15:0
0x0x0x04h
31
30
29
28
27
26:25
24
23
22
21
20
19:10
9
8
7
6
5
4
3
2
1
0
0x0x0x08h
31:24
23:16
15:8
7:0
Register Bit Name
PCI ID
Device ID
Vendor ID
PCI Command and Status
PERR
SERR Sent
Master ABRT
Target ABRT
Target ABRTS Signaled
DEVSEL_Timing
Data_PERR
FastB2B
UDF
66M
Cap_Lst
Reserved
FBACK
SERR, System Error Enable
Step
PERR
VGA Palette Snoop
MWINV
SCYC
MSTR
MEM
IO
PCI Rev ID and Class Code
Class Code
Sub_Class Code
Prog. I/F
Revision ID
Initialized/
Required
Value
700Eh
1022h
0b
yb
yb
yb
0b
01b
0b
0b
0b
0b
1b
000h
0b
yb
0b
0b
0b
0b
0b
1b
1b
0b
06h
00h
00h
1yh
Actual
Value
Key fcn( )
Notes
r
Single-processor DDR
Northbridge
r
AMD
r
Not supported
c
R/W/1C, from AMD-761™
system controller
u
R/W/1C, from bus master
u
R/W/1C, from bus master target
r
Not supported
r
r
r
r
r
r
r
u
0 = Disable, 1 = Enable
r
r
r
r
r
r
B
PCI memory access enable
r
IO access disable on PCI bus
r
Bridge device
r
Host/PCI bridge
r
Host/PCI bridge
r
Rev B1 = 11h, B2=12h, B3=13h
KEY:
B= Mandatory BIOS function
A= AGP setup by BIOS
c = Calculated/set by AMD-761™ internal logic
P= Power management setup by BIOS o = Setup by OS or OS driver F = Performance enhancement set by BIOS
r = Hardcoded and reserved
u = PCI operational user interface E = Elective BIOS function
Chapter 7
Recommended BIOS Settings
213