FA         CLI         Clear interrupt flag; interrupts disabled when interrupt flag cleared


Description

Clears the IF flag in the EFLAGS register. No other flags are affected. Clearing the IF flag causes the processor to ignore maskable external interrupts. The IF flag and the CLI and STI instruction have no affect on the generation of exceptions and NMI interrupts.


Operands        Bytes                Clocks

               1                7   NP


Flags

The IF is cleared to 0 if the CPL is equal to or less than the IOPL; otherwise, it is not affected. The other flags in the EFLAGS register are unaffected.

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