AMD-761 Datasheet, PDF (259/264 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
Description
0x1x0x00h
PCI ID
31:16 Device ID
15:0 Vendor ID
0x1x0x04h PCI Command and Status
31
PERR_Rcv
30
SERR Sent
29
28
27
26:25
24
23
22
21
20
19:10
9
8
7
6
5
4
3
2
1
0
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
0x1x0x08h
31:24
23:16
15:8
7:0
PCI Rev ID and Class Code
Class Code
Sub_Class Code
Prog. I/F
Revision ID
Initialized/
Required
Value
700Fh
1022h
0b
yb
0b
0b
0b
01b
0b
0b
0b
1b
0b
00b 00h
0b
yb
0b
0b
0b
0b
0b
1b
1b
1b
06h
04h
00h
00h
Actual
Value
Key
fcn( )
Notes
r
AMD-761™ system
controller
r
AMD
r
Not supported
u
R/W/1C, from AMD-761
system controller
r
R/W/1C, from bus master
r
R/W/1C, from bus master target
r
Not supported
r
r
r
r
r
Support 66 MHz on device 1
r
r
u
0 = Disable, 1 = Enable
r
r
r
r
r
B
DMA enabled on APCI
B
Memory access enable on APCI
B
IO access Enabled on APCI
r
Bridge device
r
Host/PCI bridge
r
Host/PCI bridge
r
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
247