Changes

A 3.5" disc drive. 80 tracks and 1.4MB.  Sold as : * '''M1/S''' with controller, .* '''M1-Z/D''' without with controller as second drive and two drives.* '''M1/D-Z''' with without controller and two drivesas second drive.  The disc drive also was available as an extended version, called : * '''M1-XRS''', which also contains a [[RS232]] interface, and .* '''M1-X''', which can be updated with a RS232 interface.  Disc operation system [[VDOS]] 2.0 on ROM included.