Changes
/* Vortex -X Drives (720K/disk) */
* '''M1 - XRS''' same as M1-X, upgraded with RS232 interface
These are the newest drives from Vortex, for use on CPC 664/6128 or CPC 464 with DDI-1 (ie. on computers that already have a FDC). The |S command (for accessing a third drive) is no longer supportedused, the new |X commands command allows to swap drive A and B.
== I/O Ports ==
