INT 1Eh (30)             Diskette Parameters

        This vector points to a data region containing the parameters
        required for the diskette drive. The Power-on routines initialize
        the vector to point to the parameters contained in the ROM diskette
        routines. Theese default parameters represent the specified values
        for vanilla drives attached to the machine. Changing this parameter
        block may be necessary to reflect the specifications of the actual
        attached drives.