Changes
/* I/O Ports */
== I/O Ports ==
2 ports are used to control the [[MIDI]] soundcard: &FEAC for data, and &FEAD for control and status. Sadly, it is not compatible with the [[EMR MIDI Interface]] which is located at ports &F8F2 and &F8F3.
3 ports are used to control the OPL3 soundcard: &FEBC and &FEBE are register select ports, and &FEBD is the data port.
