參數(shù)資料
型號: 82815EM
英文描述: Controller Miscellaneous - Datasheet Reference
中文描述: 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁數(shù): 106/163頁
文件大?。?/td> 1049K
代理商: 82815EM
Intel
82815EM GMCH
R
106
Datasheet
3.8.16.
SID—Subsystem Identification Register (Device 2)
Address Offset:
2E
2Fh
Default Value:
0000h
Access:
Read/Write Once
Bit
Descriptions
15:0
Subsystem ID (Read/WriteO).
This value is used to identify a particular subsystem.
The default value is 0000h. This field should be programmed by BIOS during boot-up.
Once written, this register becomes Read_Only. This Register can only be cleared by a Reset.
3.8.17.
ROMADR - Video BIOS ROM Base Address Registers (Device 2)
Address Offset:
30
33h
Default Value:
00000000h
Access:
Read Only
31
18
17
16
ROM Base Address
(addr bits [31:18])
Address Mask (HW=0;
256 KB addr range)
15
11
10
1
0
Address Mask (cont)
(HW=0; 256 KB addr range)
Reserved
ROM
BIOS En
(HW=0)
Bit
Descriptions
31:18
ROM Base Address
RO.
Hardwired to 0s.
17:11
Address Mask
RO.
Hardwired to 0s to indicate 256 KB address range.
10:1
Reserved.
Hardwired to 0s.
0
ROM BIOS Enable
RO.
0 = ROM not accessible.
3.8.18.
CAPPOINT—Capabilities Pointer Register (Device 2)
Address Offset:
34h
Default Value:
DCh
Access:
Read Only
Bit
Descriptions
7:0
Pointer to the start of AGP standard register block.
Since there is no AGP bus on GMCH2-M, this
field is set to DCh to point to the Power Management Capabilities ID Register
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