Specification Update

MOBILE INTEL

CELERON

PROCESSOR at 466 MHz, 433 MHz, 400 MHz,

366 MHz, 333 MHz, 300 MHz, 266 MHz SPECIFICATION UPDATE

H67.

Processor Does not Flag #GP on Non-zero Write to Certain

MSRs

Problem - When a non-zero write occurs to the upper 32 bits of SYSENTER_EIP_MSR or

SYSENTER_ESP_MSR, the processor should indicate a general protection fault by flagging #GP. Due to this

erratum, the processor does not flag #GP.

Implication - The processor unexpectedly does not flag #GP on a non-zero write to the upper 32 bits of

SYSENTER_EIP_MSR or SYSENTER_ESP_MSR. No known commercially available operating system has

been identified to be affected by this erratum.

Workaround - None identified.

Status - For the steppings affected, see the Summary of Changes at the beginning of this section.