Errata
40 Specification Update
Implication: When this erratum occurs, data corruption may occur.
Workaround: It is possible for the BIOS to contain a workaround for this erratum.
Status: For the steppings affected, see the Summary Tables of Changes.
30. Stale Data in Processor Translation Cache May Result in Hang
Problem: Several instructions and task switches normally invalidate the processor translation
cache. Under an internal boundary condition these instructions or task switches may
not completely invalidate the processor translation cache.
Implication: When this erratum occurs, subsequent processor load and store operations may use
stale translations leading to unpredictable results.
Workaround: It is possible for BIOS code to contain a workaround for this erratum.
Status: For the steppings affected, see the Summary Tables of Changes.
31. I/O Buffers for FERR#, PROCHOT# and THERMTRIP# Are Not AGTL+
Problem: The I/O buffers for the FERR#, PROCHOT# and THERMTRIP# signals are specified in
the Intel
®
Pentium
®
4 Processor in the 423-pin Package Datasheet as AGTL+ buffers.
The buffers for these signals were instead designed with CMOS buffers.
Implication: It is not expected that any platforms will be affected by this erratum.
Workaround: None necessary.
Status: For the steppings affected, see the Summary Tables of Changes.
32. RFO and Correctable Error Combination May Cause Lost Store or
Hang
Problem: The processor may lose a store operation or the system may hang in the following
scenario:
• Error reporting is not enabled in the IA32_MC1_CTL register, and
• The processor issues a Read for Ownership (RFO) that hits an L2 cache line in the
Exclusive or Modified state.
• This RFO access receives a correctable error that occurs at the same time this
cache line is hit by an external snoop.
Implication: When this erratum occurs a store operation will be lost, or the system will hang. This
erratum has only been observed in a focused testing environment.
Workaround: None identified.
Status: For the steppings affected, see the Summary Tables of Changes.
33. RFO and Correctable Error May Incorrectly Signal the Machine Check
Handler
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