Q$\mathrm{.}1)$

Illustrate a partial program execution mechanism showing the relevant portions of memory and processor registers. The program fragment should add the contents of the memory words which are present at addresses $830,831$ and $832$ and only the final result has to be stored back to memory. Show all the instruction cycles in detail each consisting of a fetch stage and an execute stage. Also show the contents of the indicated registers and memory locations at each step. Note that all the values are in a hexadecimal format. Your answers too are expected in a hexadecimal format. Please rewrite the memory contents at each and every stage.

The list of opcodes is as follows:

$1000=$ Load AC from memory

$0011=$ Store AC to memory

$0111=$ Add to AC from memory

$(8$ points$)$

$\backslash$table$[[$Memory$,],[$Address$,\backslash$table$[[$Memory$],[$Contents$]]],[684,8830],[685,7831],[686,7832],[687,3832],[dots.,$dots