Answer to Question #262707 in Computer Networks for hifly

Question

Consider that R1 and R2 both are 8 bit registers and contains 11110000 and 00110110 respectively. What will be the values of select inputs, carry-in input and result of operation (including carry out bit) if the following micro-operations are performed? (For each micro operation you may assume the initial value of R1 and R2 as given above)

(i) Decrement R1

(ii) Add R1 and R2 with carry

(iii)AND R1 and R2

(iv) Shift right R1

Answer 1

1. Decrement R1 = 1110 1111
2. Add R1 and R2 with carry = (1) 0010 0110
3. AND R1 and R2 = 0011 0000
4. Shift right R1 = 1111000