INTRODUCTION TO MICROPEOCESSOR
MICROCOMPUTER SYSTEM
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Detailed explanation-1: -A trap is a synchronous interrupt triggered by an exception in a user process to execute functionality. Exception conditions like invalid memory access, division by zero, or a breakpoint can trigger a trap in an OS. A trap changes the mode of an OS to a kernel routine.
Detailed explanation-2: -The trap is a signal raised by a user program instructing the operating system to perform some functionality immediately. The interrupt is a signal to the CPU emitted by hardware that indicates an event that requires immediate attention. It is a synchronous process.
Detailed explanation-3: -The SIGNAL instruction, like CALL, interrupts the usual flow of a program and causes control to pass to a specified label. The label to which control passes can be before or after the SIGNAL instruction. Unlike CALL, SIGNAL does not return to a specific instruction to resume execution.