Intel E6600 - Core 2 Duo Dual-Core Processor Specification page 33

Errata
Workaround: Software should ensure that memory accesses in 32-bit mode do not occur
above the 4G limit (0ffffffffh).
For the steppings affected, see the Summary Tables of Changes.
Status:
AI28. EIP May be Incorrect after Shutdown in IA-32e Mode
When the processor is going into shutdown state the upper 32 bits of the
Problem:
instruction pointer may be incorrect. This may be observed if the processor is
taken out of shutdown state by NMI#.
Implication: A processor that has been taken out of the shutdown state may have an
incorrect EIP. The only software which would be affected is diagnostic
software that relies on a valid EIP.
Workaround: None identified.
For the steppings affected, see the Summary Tables of Changes.
Status:
AI29. #GP Fault is Not Generated on Writing IA32_MISC_ENABLE [34]
When Execute Disable Bit is Not Supported
A #GP fault is not generated on writing to IA32_MISC_ENABLE [34] bit in a
Problem:
processor which does not support Execute Disable Bit functionality.
Implication: Writing to IA32_MISC_ENABLE [34] bit is silently ignored without generating
a fault.
Workaround: None identified.
For the steppings affected, see the Summary Tables of Changes.
Status:
AI30. (E)CX May Get Incorrectly Updated When Performing Fast String REP
MOVS or Fast String REP STOS With Large Data Structures
When performing Fast String REP MOVS or REP STOS commands with data
Problem:
structures [(E)CX*Data Size] larger than the supported address size structure
(64K for 16-bit address size and 4G for 32-bit address size) some addresses
may be processed more than once. After an amount of data greater than or
equal to the address size structure has been processed, external events (such
as interrupts) will cause the (E)CX registers to be increment by a value that
corresponds to 64K bytes for 16 bit address size and 4G bytes for 32 bit
address size.
Implication: (E)CX may contain an incorrect count which may cause some of the MOVS or
STOS operations to re-execute. Intel has not observed this erratum with any
commercially available software.
Workaround: Do not use values in (E)CX that when multiplied by the data size give values
larger than the address space size (64K for 16-bit address size and 4G for
32-bit address size).
For the steppings affected, see the Summary Tables of Changes.
Status:
®
Intel Core™2 Extreme Processor X6800 and
®
Intel Core™2 Duo Desktop Processor E6000 and E4000 Sequence
Specification Update
33