How to do this question? Can you teach me like basic knowledge?? Thanks you! as

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How to do this question? Can you teach me like basic knowledge?? Thanks you! as simplest as you can!

Problem 7 (10 pts) Execute the following program, and fill in the blanks with correct values for registers PC and AC, and the contents in memory locations X, temp and subr after each instruction is executed starting from the first instruction. PC AC MX M[temp] M[subr] 101 102 108 24 109 10A 48 103 104 105 48 Hex ??? Address Label Instruction 100 101 102 103 104 105 106 107 108 109 10A 24 24 24 24 21 24 48 48 24 0 LoadX Store temp UnS Store X Halt 24 24 24 24 24 24 24 24 subr 103 103 103 103 103 103 24 X, Dec 24 temp, Dec subr, Hex 48 Load Add JumpI mp temp subr 48

Explanation / Answer

Explanation

                   PC=next instruction address=101

                   AC=data in the memory=here it is data pointing the address X ,So Ac=24. Which reside in M[X] where 105

                   So, M[x]=24

                   value assign in temp memory space(106) is 0, so,M[temp]=0 and M[subr]=0=assigned in 107

              Store temp

     Here,

   PC=102,   AC=ALU now processing x data, that is 24,So AC=24

M[X]=24 M[temp]=store value of X=24 and M[subr]=0

                     JnS subr---->mean check the sign flag set or not.If not set then jump into "subr" label.

                      So, PC=108(next address of label subr)

                               AC=process same value=24

                               M[X]=24 M[temp]=24 M[subr]=store the return address =103

   Load temp

   PC=109 AC=24(temp data)    M[x]=24    M[x]=24 and M[subr]=103

                 Add temp

          PC=10A AC=24+24=48     M[x]=24   M[temp]=24   M[subr]=103

                 JumpI subr--->jump into jumpr pointing address means103

So,

         PC=next instruction address=103 AC=48       M[x]=24 M[temp]=24    M[subr]=103

                        Store X--- >store accumulator value into memory of X

                           PC=104        AC=48   M[X]=48   M[temp]=24     M[subr]=103

                          HALT--->end of the execution

                    PC=105    AC=48        M[X]=48   M[temp]=24   M[subr]=103

                 

                   

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