IDIV - Signed Integer Division

        Usage:   IDIV   src
        Modifies flags: (AF,CF,OF,PF,SF,ZF undefined)

        Signed binary division of accumulator by source.  If source is a
        byte value, AX is divided by src and the quotient is stored in
        AL and the remainder in AH.  If source is a word value, DX:AX is
        divided by src, and the quotient is stored in AL and the
        remainder in DX.
                                 Clocks                 Size
        Operands         808x  286   386   486          Bytes

        reg8          101-112   17    19    19            2
        reg16         165-184   25    27    27            2
        reg32            -      -     43    43            2
        mem8     (107-118)+EA   20    22    20           2-4
        mem16    (171-190)+EA   38    30    28           2-4  (W88=175-194)
        mem32            -      -     46    44           2-4


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