參數(shù)資料
型號: 845PE
廠商: Intel Corp.
英文描述: 82845GE Graphics and Memory Controller Hub (GMCH) and 82845PE Memory Controller Hub (MCH)
中文描述: 82845GE圖形和內(nèi)存控制器中樞(GMCH)和82845PE內(nèi)存控制器中樞(MCH)
文件頁數(shù): 79/176頁
文件大?。?/td> 2661K
代理商: 845PE
Intel
82845GE/82845PE Datasheet
79
Register Description
3.5.2.6
SUBC1—Sub-Class Code Register (Device 1)
Address Offset:
Default Value:
Access:
Size:
0Ah
04h
RO
8 bits
This register contains the Sub-Class Code for the (G)MCH Device 1.
3.5.2.7
BCC1—Base Class Code Register (Device 1)
Address Offset:
Default Value:
Access:
Size:
0Bh
06h
RO
8 bits
This register contains the Base Class Code of the (G)MCH Device 1.
3.5.2.8
MLT1—Master Latency Timer Register (Device 1)
Address Offset:
Default Value:
Access:
Size:
0Dh
00h
RO, R/W
8 bits
This functionality is not applicable. It is described here since these bits should be implemented as a
read/write to prevent standard PCI-to-PCI bridge configuration software from getting “confused.”
Bit
Description
7:0
Sub-Class Code (SUBC).
This is an 8-bit value that indicates the category of Bridge into which the
Device 1 of the (G)MCH falls.
04h = PCI-to-PCI bridge.
Bit
Description
7:0
Base Class Code (BASEC).
This is an 8-bit value that indicates the Base Class Code for the
(G)MCH Device 1.
06h = Bridge device.
Bit
Description
7:3
Scratchpad MLT (NA7.3).
These bits return the value with which they are written; however, they
have no internal function and are implemented as a scratchpad merely to avoid confusing software.
2:0
Reserved.
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