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910GL 데이터시트(PDF) 188 Page - Intel Corporation

부품명 910GL
상세설명  Express Chipset
PDF  426 Pages
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제조업체  INTEL [Intel Corporation]
홈페이지  http://www.intel.com
Logo INTEL - Intel Corporation

910GL 데이터시트(HTML) 188 Page - Intel Corporation

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Integrated Graphics Device Registers (D2:F0)
(Intel® 82915G/82915GV/82915GL/ 82910GL GMCH Only)
R
188
Datasheet
9.1.27
MSAC—Multi Size Aperture Control (D2:F0)
PCI Device:
2
Address Offset:
62h
Default Value:
00h
Access:
R/W
Size:
8 bits
This register determines the size of the graphics memory aperture in function 0 and in the trusted
space. By default, the aperture size is 256 MB (bit 27 read only). If bit 1 is set to a 1, then the
aperture size is limited to 128 MB. Only the system BIOS will write this register based on pre-
boot address allocation efforts, but the graphics may read this register to determine the correct
aperture size. System BIOS needs to save this value on boot so that it can reset it correctly during
S3 resume.
Bit
Access &
Default
Description
7:4
R/W
0h
Scratch Bits Only. These bits have no physical effect on hardware.
3:2
Reserved
1
R/W
0b
256-MB Aperture Disable
0 = Bit 27 of GMADR and the equivalent trusted memory aperture is read-only,
allowing 256 MB of address space to be mapped.
1 = Bit 27 of GMADR and the equivalent trusted memory aperture is read-write,
limiting the address space to 128 MB.
0
Reserved
9.1.28
PMCAPID—Power Management Capabilities ID (D2:F0)
PCI Device:
2
Address Offset:
D0h
Default Value:
0001h
Access:
RO
Size:
16 bits
Bit
Access &
Default
Description
15:8
RO
00h
NEXT_PTR: This field contains a pointer to next item in capabilities list. This is
the final capability in the list and must be set to 00h.
7:0
RO
01h
CAP_ID: SIG defines this ID is 01h for power management.



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