Show the contents in hexadecimal form 0x of the memory locat

Show the contents (in hexadecimal form 0x...) of the memory location indicated after the instruction has been completed. Assume that the program addresses given are valid addresses for the instructions. Indicate the contents of the following memory locations AFTER line 2 has been executed. Indicate the contents of the following memory locations AFTER line 9 has been executed.

Solution

Given the content before execution:

Line 2 has a call instruction, which transfers control to the subroutine called, return address i.e IP is pushed to stack. Line to doesnot change the contents of RAM 0x027A: 0x027F. thus:

Program has nop instruction which do nothing, only increments the instruction pointer(IP).

JMP instuction will go to the specified address. It will not copy the current address to stack, so contents of the stack poiter (SP) is only changed after Call instruction.

Line9 has a RET instruction which return the control to caller, pop the address from the stack.

Contents of the Memory before Line 1 has been executed
RAM	0x01
0x27F	0x01
0x27E	0x23
0x27D	0x45
0x27C	0x67
0x27B	0x89
0x27A	0xAB
PC	0xF828
SP	0x0280