Answer to Question #260120 in Electrical Engineering for nit

Question

Find the values of the flags(carry, sign, zero, overflow) of the processor status register for the given example of two 12 bit no’s in Hex (AB7 + DEF) and draw the circuit diagram also. 

Answer 1

given two 8 bit, no's in Hex are: A7+EF

in order to add those two numbers first convert both of them to binary numbers:

The binary equivalent of A7 is:

1010 0111

and the Binary equivalent of EF is: 

1110 1111

the result is: 110010110

carry flag will be set to 1 as the result is having to carry forward

sign flag is set to 1 as the MSB(Most Significant Bit) is 1 so the result is negative

zero flags set to 0 as the result is not all zeros

the overflow flag is set to 1 as the result does not fit in the 8-bit operand