INTO            Interrupt on Overflow                Flags: O D I T S Z A P C
                                                            ? ? ? ? ? ? ? ? ?
INTO                                                 IOv86

        Logic   ; Real mode
                if OF = 1
                   PUSHF
                   TF ← 0
                   IF ← 0
                   CALL FAR [0000:0010h]
                endif

    INTO invokes interrupt 4 if the overflow flag (OF) is set, and
    interrupt 4 is reserved for this purpose. OF is set by several
    arithmetic, logical, and string instructions.

    This instruction is IOPL-sensitive in V86 mode.


    Opcode      Format
    CE          INTO


    Length and timing
    Operands    Bytes   8088    186     286     386     486     Pentium
                 1      4/73    4/48    3/24+m  3/35    3/28    4/13 NP

                             Protected mode

                bytes                   286     386     486     Pentium
                 1                    (40-78)+m 59-99   44-71  27-56 NP

                          Task switch clocks not shown