GUS_IOH4_OFFSET
if (bus_space_map(iot, iobase+GUS_IOH4_OFFSET, GUS_NPORT4, 0, &ioh4))
if (bus_space_map(sc->sc_iot, sc->sc_iobase+GUS_IOH4_OFFSET, GUS_NPORT4, 0,
#define GUS_MIDI_CONTROL (0x100-GUS_IOH4_OFFSET)
#define GUS_MIDI_STATUS (0x100-GUS_IOH4_OFFSET)
#define GUS_MIDI_READ (0x101-GUS_IOH4_OFFSET)
#define GUS_MIDI_WRITE (0x101-GUS_IOH4_OFFSET)