INT

This instruction triggers a software interrupt. The IF flag is set to 0 because an interrupt will be executed. The other flags are not affected.

Usage

INT N

N is the interrupt number (0-255), which must be immediate (see operand types).

It uses the same interrupt vector mechanism as hardware interrupts. It is typically used for system calls, but if called with any other number, it will execute the interrupt routine associated with that number.

Encoding

00011010, interrupt number