HW 11 Instruction Execute Format

ldd $9, $2, #5  0111 1001 0010 0100 

cycle 3: 0010 > a mux, [$2] > a bus > alu 0000 0000 0000 0100 >> b bus > alu ALUADD, CARRYIN alu >> c bus > system bus >> mar 

cycle 4: MEMREAD, memory[mar]  mdr 

cycle 5: REGWRITE 1001 > c mux [mdr] >> system bus > c bus > $9 

Describe the activity required to execute the following instructions:

NOR $A, $3, $8

STD $A, $5, #7