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Intel 64 and IA-32 Architectures Software Developers Manual Volume 2A, Instruction Set Reference, A-M

ManualsBrandsIntel ManualsOtherIntel Pentium 4 Processor 2.80 GHz, 512K Cache, 533 MHz FSB
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3-512 Vol. 2
INSTRUCTION SET REFERENCE, A-M
Compatibility Mode Exceptions
None.
64-Bit Mode Exceptions
#UD If CPUID.80000001H:ECX.LAHF-SAHF[bit 0] = 0.