User's Manual

THE 80286 INSTRUCTION SET
STI-Set Interrupt Enable Flag
Opcode Instruction Clocks Description
FB
STI 2 Set interrupt enable flag, interrupts enabled
FLAGS MODIFIED
Interrupt = I (enabled)
FLAGS UNDEFINED
None
OPERATION
The interrupts-enabled flag is sct to 1. The 80286 will now respond to external interrupts after execut-
ing the STI instruction.
PROTECTED MODE EXCEPTIONS
#GP(O) if the current privilege level is bigger (has less privilege) than the I/O privilege level.
REAL ADDRESS MODE EXCEPTIONS
None
B-106