* '''M1 - D''' Double 3.5" drive with [[FDC|NEC765]], with [[VDOS]] 1.0
These are the original drives from Vortex, for use on CPC 464. The hardware supports one or two 80 track drives, additionally a 3" [[Amstrad Disk Drive|FD-1]] can be connected as third drive, ie. unlike most other CPC disk interfaces it supports more than 2 drives. [[VDOS]] only stores information for 2 drives at one time. TO BE CONFIRMED: Does the interface fully decode US0/US1 from NEC765 and if you select unit 3 which drive is accessed.
== Vortex -Z Drives (180K/side or 180K/disk?) ==