AMD-761 Datasheet, PDF (233/264 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
Initialized/
-----
Bits
Description
Required
Value
Actual
Value
Key
fcn( )
Notes
CS7_X4Mode Chip-Select x4 Enable
7
xb
SPD # 13
B SPD 0=x8/x16, 1=x4 DIMM devices
CS6_X4Mode Chip-Select x4 Enable
6
xb
SPD # 13
B SPD 0=x8/x16, 1=x4 DIMM devices
CS5_X4Mode Chip-Select x4 Enable
5
xb
SPD # 13
B SPD 0=x8/x16, 1=x4 DIMM devices
CS4_X4Mode Chip-Select x4 Enable
4
xb
SPD # 13
B SPD 0=x8/x16, 1=x4 DIMM devices
CS3_X4Mode Chip-Select x4 Enable
3
xb
SPD # 13
B SPD 0=x8/x16, 1=x4 DIMM devices
CS2_X4Mode Chip-Select x4 Enable
2
xb
SPD # 13
B SPD 0=x8/x16, 1=x4 DIMM devices
CS1_X4Mode Chip-Select x4 Enable
1
xb
SPD # 13
B SPD 0=x8/x16, 1=x4 DIMM devices
CS0_X4Mode Chip-Select x4 Enable
0
SPD # 13
xb
B SPD 0=x8/x16, 1=x4 DIMM devices
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
221