* '''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 allocates RAM for only 2 drives though, which of the 3 drives are in-use is selected with |S command.
== Vortex -Z Drives (180K/side or 180K/disk?) ==