JG82855GMESL7VN Datasheet, PDF (105/213 Pages) Intel Corporation – Intel® 855GM/855GME Chipset Graphics and Memory Controller Hub (GMCH)

Register Description
R
Bit
8
7:0
Description
High Priority Stream Throttling Enable:
Normally High Priority Streams are not Throttled when either the counter based mechanism or
Thermal Sensor mechanism demands Throttling.
0 = Normal operation.
1 = Block High priority streams during Throttling.
Global DDR SDRAM Sampling Window (GDSW): This 8-bit value is multiplied by 4 to define the
length of time in milliseconds (0–1020) over which the number of Octal Words (16 bytes) Read/Written
is counted and Throttling is imposed. Note that programming this field to 00h disables system memory
throttling.
Recommended values are between 0.25 and 0.75 seconds.
4.10 Intel^® 855GM/GME GMCH Configuration Process
Registers (Device #0, Function #3)
See Section 4.2 for access nomenclature. Table 28 summarizes all Device#0, Function #3
registers.
Table 28. Configuration Process Configuration Space (Device#0, Function #3)
Register Name
Vendor Identification
Device Identification
PCI Command
PCI Status
Revision Identification
Sub-Class Code
Base Class Code
Header Type
Subsystem Vendor Identification
Subsystem Identification
Capabilities Pointer
HPLL Clock Control
Register
Symbol
VID
DID
PCICMD
PCISTS
RID
SUBC
BCC
HDR
SVID
SID
CAPPTR
HPLLCC
Register
Start
00
02
04
06
08
0A
0B
0E
2C
2E
34
C0
Register
End
01
03
05
07
08
0A
0B
0E
2D
2F
34
C1
Default Value
8086h
3585h
0006h
0080h
02h
80h
08h
80h
0000h
0000h
00h
00h
Access
RO
RO
RO,R/W
RO,R/WC
RO
RO
RO
RO
R/WO
R/WO
RO
RO
Datasheet
105