What is CALL operation? How does it differ with JUMP operation?

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Suresh Chand · Accepted Answer

The CALL instruction interrupts the flow of a program by passing control to an internal or external subroutine. An internal subroutine is part of the calling program. An external subroutine is another program. The differences Between CALL and JUMP instructions are: JUMP CALL Program control is transferred to a memory location which is in the main program Program Control is transferred to a memory location which is not a part of main program Immediate Addressing Mode Immediate Addressing Mode + Register Indirect Addressing Mode Initialisation of SP(Stack Pointer) is not mandatory Initialisation of SP(Stack Pointer) is mandatory Value of Program Counter(PC) is not transferred to stack Value of Program Counter(PC) is transferred to stack After JUMP, there is no return instruction After CALL, there is a return instruction Value of SP does not changes Value of SP is decremented by 2 10 T states are required to execute this instruction 18 T states are required to execute this instruction 3 Machine cycles are required to execute this instruction 5 Machine cycles are required to execute this instruction

What is CALL operation? How does it differ with JUMP operation?

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What is CALL operation? How does it differ with JUMP operation?

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