*[[Dobbertin|Dobbertin]] D-DOS Double drive. Up to four drives 80 track, doublesided.
*[[Dobbertin|Dobbertin]] X-drive 80 tracks, DS
*[[F1|Vortex disc drives FI-D, F1-S, F1-X, M1-D, M1-S]]. Own FDC, up to four drives 80 track, doublesided.*[[F1|Vortex disc drives F1-X, M1-X]]. Up to four drives 80 track, doublesided.
'''Expansion cards<br>'''