The difference between the interruption of the gate and the transfer through the trap door is only the processing of the IF sign. For the interrupt door, the if is placed 0 in the transfer process, INTR interrupts are shielded during the execution of the handler (of course, in the interrupt handler, you can open the interrupt by artificially setting the IF flag so that the response is allowed to be masked during the execution of the handler); for the trap door, keep the IF bit unchanged during the transfer process, That is, if the IF bit turns out to be 1, then the INTR interrupt is allowed after the trap door is transferred to the handler. Therefore, the interrupt door is most suitable for processing interrupts, while trap doors are suitable for handling exceptions.
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