AMD-761 Datasheet, PDF (53/264 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
AGP/PCI Capabilities Pointer
Dev0:F0:0x34
31
30
29
28
27
26
25
24
Bit
Reserved
Reset
0
0
0
0
0
0
0
0
R/W
R
23
22
21
20
19
18
17
16
Bit
Reserved
Reset
0
0
0
0
0
0
0
0
R/W
R
15
14
13
12
11
10
9
8
Bit
Reserved
Reset
0
0
0
0
0
0
0
0
R/W
R
7
6
5
4
3
2
1
0
Bit
CAP_PTR
Reset
1
0
1
0
0
0
0
0
R/W
R
Register Description
Bit Definitions
Bit Name
31–8 Reserved
7–0 CAP_PTR
Programming Notes
AGP/PCI Capabilities Pointer (Dev0:0x34)
Function
Reserved
Capabilities Pointer
This field contains a byte offset into a device’s configuration space containing the first item
in the capabilities list. The first item in the capabilities list is the AGP function.
Note that when the AGP valid bit in the PCI-to-PCI bridge virtual address space register is
set to invalid, this capabilities pointer is set by the chipset to point to the next item in the
linked list. If no next item exists, then it is set to null.
Chapter 2
AMD-761™ System Controller Programmer’s Interface
41