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Function 6506h          Get Collate-Sequence Table                   DOS 3.3+

    Returns the address of the collate-sequence table for the
    specified code page and country code. The table is a character
    array of 256 elements; each element specifies the sorting weight
    of the corresponding character. (The sorting weight is the value
    used to determine whether a character appears before or after
    another character in a sorted list.) Sorting weights and character
    values are not necessarily the same -- for example, in a given
    character set, the sorting weights for the letters A and B might
    be 1 and 2 even though their character values are 65 and 66.

        Entry   AX    = 6506h
                BX    = Code page ID (0FFFFh = current code page)
                CX    = Size of buffer (min. 5)
                DX    = Country code (0FFFFh = current country)
                ES:DI = Pointer to country info buffer

        Return  Buffer updated
                or
                AX = Error code, if CF is set
                     | 01h Invalid function (CX < 5)
                     | 02h File not found

    ------------------------------------------------------------------

    Format of country info buffer:
        Offset  Size    Description
        00h     1       Info-ID (= 06h)
        01h     4       32-bit address of collate-sequence table

    The collate-sequence table starts with a 16-bit value that
    specifies the length of the table; the remainder of the table
    specifies the sorting weight for each character.