What is the difference between JMP and CALL statements?

The main difference is: JMP performs a jump to a location, without doing anything else. CALL pushes the current instruction pointer on the stack (rather: one after the current instruction), and then JMPs to the location.

What is a call instruction?

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. When calling an external subroutine, CALL passes control to the program name that is specified after the CALL keyword.

What is the difference between branch and jump instruction?

There is another difference between branch and jump instructions. Jump instructions specify an absolute address which the PC will be set to, whereas branch instructions offset the address in the program counter.

Where is call instruction stored?

The CALL instruction is used whenever we need to make a call to some procedure or a subprogram. Whenever a CALL is made, the following process takes place inside the microprocessor: The address of the next instruction that exists in the caller program (after the program CALL instruction) is stored in the stack.

What is call instruction microprocessor?

Call Instructions – The call instruction transfers the program sequence to the memory address given in the operand. Before transferring, the address of the next instruction after CALL is pushed onto the stack. Call instructions are 2 types: Unconditional Call Instructions and Conditional Call Instructions.

What is int0 instruction?

INT is an assembly language instruction for x86 processors that generates a software interrupt. It takes the interrupt number formatted as a byte value. When written in assembly language, the instruction is written like this: INT X. where X is the software interrupt that should be generated (0-255).

What is IRET instruction?

The IRET instruction is used at the end of an interrupt service procedure to return execution to the interrupted program. To do this return, the 8086 copies the saved value of IP from the stack to IP, the stored value of CS from the stack to CS, and the stored value of the flags back to the flag register.