Suppose AX contains 7FFFh and BX contains 0001h after the operation of ADD AX, BX find the content of the CF, SF, ZF, PF and OF.

MOV AX, 7FFFh ;AX = 7FFFh

MOV BX, 0001h ;BX = 0001b

ADD AX, BX ;add BX to AX, now AX = 8000h

7FFF		0111	1111	1111	1111
+ 0001		0000	0000	0000	0001
8000		1000	0000	0000	0000

Flag register status

CF = 0 since there is no carry beyond d15

AF = 1 since there is a carry from d3 to d4

PF = 1 since there is an even number of 1’s in the result

ZF = 0 since the result is not zero

SF = 1 since d15 of the result is 1.