Commodore Business Machines' s "advanced" {disk drive} for the {C128}.It was the double-sided version of the Commodore 1570 disk drive but, unlike the 1570, worked quite well.The 1571 supported "burst mode" loading when used on a C128 in native mode, which increased the transfer speed from 1541 speed to about three kilobytes per second (about a 10-fold increase).The 1571 could be told to emulate a 1541 for use with a C64 or 1541 disks.Bugs in early releases of the 1571 ROM affected access to the second side of the disk.(1996-04-07)