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Intel Pentium CPU Instruction Set Reference

STC instruction - Set Carry Flag

Code Mnemonic Description
F9 STC Set Carry Flag


Sets the CF flag in the EFLAGS register.

Operands Bytes Clocks
1 2 NP


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 sets
OF unaffected