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-數(shù)據(jù)表參考
文件頁數(shù)： 78/163頁
文件大?。?/td> 1049K
代理商： 82815EM
Intel
82815EM GMCH
R
78
Datasheet
3.6.36.
ERRCMD—Error Command Register (Device 0)
Address Offset:
CBh
Default Value:
00h
Access:
Read/Write
Size:
8 bits
This register enables various errors to generate a SERR hub interface special cycle. Since the GMCH2-M
does not have an SERR# signal, SERR messages are passed from the GMCH2-M to the ICH2-M over
hub interface. The actual generation of the SERR message is globally enabled for Device 0 via the PCI
Command register.
(AGP mode only.)
Note:
An error can generate one and only one hub interface error special cycle. It is software’s responsibility to
make sure that when an SERR error message is enabled for an error condition, SMI and SCI error
messages are disabled for that same error condition.
7
6
5
4
3
2
1
0
Reserved
SRMMRO
SRTA
SLNDM
SAAOGA
SIAA
SAIGATTE
Bit
Description
7:6
Reserved.
5
SERR on Receiving Main Memory Refresh Overrun.
Identical functionality in Device 2 memory
mapped space @ 020B8h. This bit allows use of this same functionality in AGP Mode.
0 = reporting of this condition is disabled.
1 = the GMCH2-M generates an SERR hub interface special cycle when a main memory refresh
overrun occurs.
4
SERR on Receiving Target Abort on the hub interface.
0 = reporting of this condition is disabled.
1 = the GMCH2-M generates an SERR hub interface special cycle when an GMCH2-M originated hub
interface cycle is terminated with a Target Abort.
3
SERR on LOCK to non-DRAM Memory.
0 = reporting of this condition is disabled.
1= the GMCH2-M generates an SERR hub interface special cycle when a processor initiated LOCK
transaction targeting non-DRAM memory space occurs.
2
SERR on AGP Access Outside of Graphics Aperture.
0 = reporting of this condition is disabled.
1 = the GMCH2-M generates an SERR hub interface special cycle when an AGP access occurs to an
address outside of the graphics aperture.
1
SERR on Invalid AGP Access.
0 = reporting of this condition is disabled.
1 = GMCH2-M generates an SERR hub interface special cycle when an AGP access occurs to an
address outside of the graphics aperture and either to the 640k - 1M range or above the top of memory.
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