Suppose you have two 8-bit registers, A and B. containing signed two's complement values A contains...

Question

Question

Suppose you have two 8-bit registers, A and B. containing signed two's complement values

A contains the value 11001110

B contains the value 11111010

What is the decimal value of the difference between them (A - B)?

engineering Computer-Science

Answer 1

Answer #1

Given Values:

A = 11001110 => (-78)
B = 11111010 => (-122)

Performing (A - B):

Taking 2's compliment of B:

1's Compliment of B: 0000101
2's Compliment of B: 0000110

A - B:

=> 1001110 + 0000110 => 1010100

Hence the result is 11010100 which is in 2's compliment form

Taking 2's compliment for result:

=> Result in decimal is: 42

Answer 2

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