User's Manual

THE 80286·INSTRUCTION SET
ell-Clear Interrupt Flag
Opcode Instruction Clocks Description
FA
CLI
3
Clear interrupt flag; interrupts disabled
FLAGS MODIFIED
Interrupt = 0
FLAGS UNDEFINED
None
OPERATION
CLI clears the interrupt enable flag if the current privilege level is at least as privileged as 10PL. No
other flags are affected. External interrupts
will not be recognized at the end of the CLI instruction or
thereafter until the interrupt flag
is set.
PROTECTED MODE EXCEPTIONS
#GP(O) if the current privilege level is bigger (has less privilege) than the 10PL in the flags register.
10PL specifies the least privileged level at which I/O may be performed.
REAL ADDRESS MODE EXCEPTIONS
None
8-30