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Register Descriptions
2-24 Intel® 460GX Chipset Software Developer’s Manual
2.4.5 GXB
2.4.5.1 FERR_GXB
Function Number: BFN+1
Address Offset: 80h Size: 8 bits
Default Value: 00h Attribute: Read/Write Clear
Sticky: Yes Locked: No
These registers record the first error detected by the GXB. For the order to clear this register with
respect to the other GXB error registers.
Bits
Description
7:3 reserved (0)
2 FERR_PCI bit asserted
1 FERR_AGP bit asserted
0 FERR_GART bit asserted
2.4.5.2 FERR_PCI
Function Number: BFN+1
Address Offset: 84h Size: 8 bits
Default Value: 00h each Attribute: Read/Write Clear
Sticky: Yes Locked: No
These registers record the first error detected in GPI.
Bits
Description
7 PCISTS Error Logged
This bit is asserted when an error, except for a master abort, has been logged in the PCI
Status register.
6 Non-Configuration Master Abort
This bit is asserted when a master abort occurs on any transaction other than a
configuration read or configuration write.
reported the same as a master abort - see PCISTS register
5 Discard Timer Expiration
This is the 2
15
clock timeout.
4 SERR# Observed
3 PERR# Observed
2 PCI Inbound Read Que Data Parity Error
Parity error detected as read data is retrieved from buffer.
1 PCI Outbound Write Que Data Parity Error
Parity error detected as write data is retrieved from buffer.
0 Illegal OB GART Access
Access may continue or abort, results undefined.
2.4.5.3 FERR_AGP: First Error Status Register for AGP
Function Number: BFN+1
Address Offset: 85h Size: 8 bits