Intel 925 - Pentium D 925 3.0GHz 800MHz 4MB-Cache Socket 775 CPU

Register Description
R
42 Intel
®
82925X/82925XE MCH Datasheet
3.3.5 Intel
®
82925X/925XE MCH Configuration Cycle Flowchart
Figure 3-5. Intel
®
82925X/82925XE MCH Configuration Cycle Flowchart
DW I/O Write to
CONFIG_ADDRES
S with bit 31 = 1
I/O Read/Write to
CONFIG_DATA
MCH Generates
Type 1 Access to
PCI Express
MCH allows cycle to
go to DMI resulting in
Master Abort
Bus# > Sec Bus
Bus# ≤ Sub Bus
in MCH Dev 1
Bus# = 0
Device# = 1 &
Dev # 1 Enabled
& Function# = 0
Device# = 0
Function# = 0
Device# = 2 &
Dev# 2 Enabled &
Function# = 0 or 1
MCH Generates MISI
Type 1Configuration
Cycle
Bus# =
Secondary Bus in
MCH Dev 1
GMCH Generates DMI
Type 0 Configuration
Cycle
MCH Claims
MCH Claims
MCH Claims
Yes
No
Yes
Yes
No
No
Yes
Yes
Yes
No
No
No
No
Device# = 0
MCH Generates
Type 0 Accessto
PCI Express
Yes
Config_Cyc_Flow_915