Process control instructions in 8086 microprocessor

These instructions are used to control the processor action by setting/resetting the flag values.

These are the process/processor control instructions.

Opcode	Operand	Description
STC	----	Used to set carry flag CY to 1
CLC	----	Used to clear/reset carry flag CY to 0
CMC	----	Used to put complement at the state of carry flag CY.
STD	----	Used to set the direction flag DF to 1
CLD	----	Used to clear/reset the direction flag DF to 0
STI	----	Used to set the interrupt enable flag to 1, i.e., enable INTR input.
CLI	----	Used to clear the interrupt enable flag to 0, i.e., disable INTR input.