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Addition of 87H and 79H.

87 H  - 1 0 0 0 0 1 1 1

79 H -  0 1 1 1 1 0 0 1


          1 0 0 0 0 0 0 0 0

S - sign flag - Since MSB of result is 0, hence sign bit should be 0.

Z - Zero flag - Since result is zero, hence zero bit should be 1.

CY - Carry flag - Since there is a carry from MSB (8th to 9th bit), hence CY = 1

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