Source : Free On-Line Dictionary of Computing

Commodore 1570
     
         {Commodore Business Machines}'s allegedly "advanced"
        disk drive for use with the {C128}.  It is basically a {1541}
        with the capability to use "burst loading" (like the
        {Commodore 1571}), and lots of new {bug}s.
     
        The {Commodore 1571} was a double-sided version of the 1570.
     
        (1996-04-07)