1. Commodore 1570 Commodore Business Machiness 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 bugs. The Commodore 1571 was a double-sided version of the 1570.
commodore 1570 | commodore 1571 | rfc 1157 |