82830MP Datasheet, PDF (72/159 Pages) Intel Corporation – Intel 830MP Chipset: 82830MP Graphics and Memory Controller Hub (GMCH-M)

Intel® 830MP Chipset
R
4.5.1.26
ERRSTS – Error Status Register – Device #0
Address Offset: 92-93h
Default Value:
0000h
Access: Read/Write Clear
Size:
16 bits
This register is used to report various error conditions via Hub interface special cycles. An SERR, SMI,
or SCI Error Hub interface special cycle may be generated on a zero to one transition of any of these
flags when enabled in the PCICMD/ERRCMD, SMICMD, or SCICMD registers respectively.
Bit
15:13
12
11
10
9
8
7
6
5
4
3
2
1
0
Description
Reserved
Reserved
Reserved
Reserved
LOCK to non-DRAM Memory Flag (LCKF). (R/WC) When this bit is set it indicates that a CPU initiated
LOCK cycle targeting non-DRAM memory space occurred. Software must write a “1” to clear this status
bit
Received Refresh Timeout.
This Bit is set when 1024 memory core refresh are Queued up. Software must write a “1” to clear this
status bit.
DRAM Throttle Flag (DTF) (R/WC). When this bit is set it indicates that the DRAM Throttling condition
occurred. Software must write a “1” to clear this status bit.
Reserved
Received Unimplemented Special Cycle Hub interface Completion Packet FLAG (UNSC) (R/WC).
When this bit is set it indicates that the GMCH initiated a Hub interface request that was terminated with
a Unimplemented Special Cycle completion packet. Software must write a “1” to clear this status bit.
AGP Access Outside of Graphics Aperture Flag (OOGF). (R/WC) When this bit is set it indicates that
an AGP access occurred to an address that is outside of the graphics aperture range. Software must
write a “1” to clear this status bit.
Invalid AGP Access Flag (IAAF). (R/WC) When this bit is set to “1” it indicates that an AGP access
was attempted outside of the graphics aperture and either to the 640k - 1M range or above the top of
memory. Software must write a “1” to clear this status bit.
Invalid Graphics Aperture Translation Table Entry Flag (ITTEF). (R/WC) When this bit is set to “1”, it
indicates that an invalid translation table entry was returned in response to an AGP access to the
graphics aperture. Software must write a “1” to clear this status bit. Invalid translation table entries
include the following:
Invalid bit set in table entry.
Translated address hits PAM region.
Translated address hits enabled physical SMM space.
Reserved
Reserved
72
Datasheet
298338-001