Question: Calculate the following in 4-bit Twos compliment integer representation? Indicate if overflow. 4 + 2 5 + 3 -1 + - 5 -2 + -7

Calculate the following in 4-bit Twos compliment integer representation? Indicate if overflow.

4 + 2

5 + 3

-1 + - 5

-2 + -7

5 + -2

-3 + 4

8 + -8

1 + -7

5 7

-6 - 5

-1 1

0 - 1

1. Promote the following 4-bit 2s complement integers to 8-bit representation.

0001

1000

1111

1010

0111

BCD & Excess-K

3. Convert the decimal number 123 to BCD (8421) representation?

5. What is the largest and smallest value in 4-bit Excess-7 notation?

Exercise: Assume unsigned 8-bit representation. Calculate 170 + 139 and 170 - 139.

Show your work in both binary & hex.

+ 10101010 - 10101010

10001011 10001011

A A A A

+ 8 B - 8 B

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