AMD-761 Datasheet, PDF (243/264 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
7
BYPStrb
6:4 Reserved
3:2 BYP_PSlewStrb
1:0 BYP_NSlewStrb
Initialized/
Required
Value
xb
000b
xxb
xxb
Actual
Value
Key fcn( )
Notes
1=Enable Drive Bypass for
Strobes
A B4/BB _{Refer to “BIOS Initialization}
Requirements” on page 209
for details.
r
P slew rate value for strobes
A
B4/BB
Refer to “BIOS Initialization
Requirements” on page 209
for details.
N slew rate value for strobes
A B4/BB ^{Refer to “BIOS Initialization}
Requirements” on page 209
for details.
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
231