Changes

* '''F1 - X''' Single 80 track, Double Sided, - single 5.25" drive with power supply* '''M1 - X''' Single 80 Track, Double Sided, - single 3.5" drive with power supply* '''F1 - XRS''' - same as F1-X, upgraded with RS232-C interface* '''M1 - XRS''' - same as M1-X, upgraded with RS232-C interface