The ports used by Amstrad and compatible interfaces use:
* Port {| class="wikitable"|-!I/O port address!Function|-|&FA7E - ||Floppy Motor On/Off Flipflop* Port |-|&FB7E - ||FDC 765 Main Status Register (read only)* Port |-|&FB7F - ||FDC 765 Data Register (read/write)|}
The [[Vortex Disc Drives|Vortex disc interface]] uses other ports. See its dedicated wiki page.