LOGICAL Group of Instructions. Bit manipulation instruction Bit Manipulation instructions : The instruction in this category operate on bits. The instruction can set, reset or even can test a particular bit. These instructions include : Logical instructions: NOT, AND, OR, XOR and Test. FORMAT Example Comments Flags Affected NOT Source (R/M) MOV BL, 35h NOT BL BL=00110101 BL= 11001010 AND (R/M), Imm./ R/M MOV AL, 35h AND AL, 0Fh AL=00110101 AL=AL.0Fh= 00000101 CF=OF=0, AF=? PF, SF, ZF updated OR (R/M), Imm./ R/M MOV BL, 22h MOV CL, FFh OR BL, CL BL=00010110 CL=11111111 BL=BL+CL=11111111 CF=OF=0, AF=? PF, SF, ZF updated XOR (R/M), Imm./ R/M MOV AL, 55h XOR AL, FAh AL=01010101 AL xor FAh=10100111 CF=OF=0, AF=? PF, SF, ZF updated TEST R?M, Imme/R/M MOV AL, 51h TEST AL, 80h AL=01010001 Test AL,80 test if the MSB is 0 or not; if msb is zer0 Z flag will be set. CF=OF=0, AF=? PF, SF, ZF updated   2.  Shift and Rotate operation These instructions are