modify the Very Simple CPU to incorporate a new 8-bit register,R, and two new instructions. MVAC performs the transfer Râ†AC and has the instruction code 1110 XXXX; MOVR performs the operation ACâ†R and has the instruction code 1111 XXXX. The new instruction code for INC is 110X XXXX; all other instruction codes remain unchanged.
(A) Show the new, complete state diagram.
(B) Design the control unit for the modified Very Simple CPU. Provide the procedure to find the input to the counter of the control unit.
(C) Show the complete control unit.