Perform the following additions. The corresponding 16-bit binary numbers are in 2's complement notation. Provide your answers in hexadecimal.
I'm not sure about this one, am I doing the 2's complement conversion correctly?
x7D96 + x7412
0111 1011 1001 0110
+
0111 0100 0001 0010 =
1110 1111 1010 0111 2's complement notation
0001 0000 0101 1000
=
x1058
Best Answer
You missed a stage out to get the twos complement you first invert all the bits then add one and throw away the carry
So starting with:
1110 1111 1010 0111
We invert to get
0001 0000 0101 1000
Then add 1 to get
0001 0000 0101 1001
And throw the carry away if any to get
0001 0000 0101 1001 = 0x1059