Bit Manipulation Instruction Set (Logical Instructions) In 8086 Processors

NOT:  The NOT instruction inverts each bit of a byte or a word. The destination can be register or a memory location.
        Eg. :                    ; AL = 0110 1100
        NOT AL            ; AL = 1001 0011

                                   ; CX = 10101111 0010 0010
        NOT CX            ; CX = 0101 0000 11011001

AND: This instruction logically ANDs each bit of the source byte or word with the corresponding bit in the destination and stores result in the destination.

                 Eg. :               ; AL = 1001 0011 = 93H
                                       ; BL = 0111 0101 = 75H
    AND BL, AL              ; AND Byte in AL with byte in BL
                                       ; BL = 0001 0001 = 11H

OR : This instruction logically ORs each bit of the source byte or word with the corresponding bit in the destination and stores result in the destination.

                Eg. :           ; AL =1001 0011 = 93H
                                  ; BL =0111 0101 = 75H
    OR BL, AL            ; OR byte in AL with byte in BL
                                  ; BL =1111 0111 = F7H

XOR : This instruction logically XORs each bit of the source byte or word with the corresponding bit in the destination and stores result in the destination.

TEST: This instruction logically ANDs each bit of the source byte or word with the corresponding bit in the destination and updates the flags but not stores results in anywhere.

                 Eg. :            ; AL = 1001 0011 = 93H
                                    ; BL = 0111 0101 = 75H
    AND BL, AL           ; AND Byte in AL with byte in BL
                                    ; Result = 0001 0001 = 11H (not stored)
                                    ; Z  = 0, P = 1 (flag affected))
    AND BX, AX          ;  AND word in AX with word in BX
                                    ; updates the flag and result is not stored.