2 4-bit signed values. So we will shift a total of 4 times. -6, 5 -6 1010 multiplicand +6 0110 two's comp. of multiplicand 5 0101 multiplier A 1010 0000 0 S 0110 0000 0 P 0000 0101 0 P 0000 0101 0 last 2 bits are 1 0, so add S to P 0110 0000 0 add 0110 0000 ------------ 0110 0101 0 total P1 0011 0010 1 shift right arithmetic. P1 0011 0010 1 last 2 bits are 0 1, so add A to P 1010 0000 0 add 1010 0000 ------------ 1101 0010 1 total P2 1110 1001 0 shift right arithmetic P2 1110 1001 0 last 2 bits are 1 0, so add S to P 0110 0000 0 add 0110 0000 ------------ _0100 1001 0 shift right arithmetic P3 0010 0100 1 P3 0010 0100 1 last 2 bits are 0 1, so add A to P 1010 0000 0 add 1010 0000 ------------- 1100 0100 1 P4 11l0 0010 0 shift right arithmetic 1110 0010 -30 0001 1101 take 2 comp. to check. 1 +1 --------- 0001 1110 16 + 8 + 4 + 2 = 30