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Code Mnemonic Description
0F 09 WBINVD Write back and flush Internal caches; initiate writing-back and flushing of external caches.

Description
Operands Bytes Clocks
2 2000+ NP

Flags
ID unaffected DF unaffected
VIP unaffected IF unaffected
VIF unaffected TF unaffected
AC unaffected SF unaffected
VM unaffected ZF unaffected
RF unaffected AF unaffected
NT unaffected PF unaffected
IOPL unaffected CF unaffected
OF unaffected