Yamaha MDF1 Owner's Manual page 25

Display Meaning
MIDI data reception completed.
Disk R/W (read/write) error (see page 24, Error
Message Table)
MIDI input error (see page 24, Error Message Table)
—À-
Disk full (see page 24, Error Message Table)
Indicates Job mode.
OK? (Do you wish to execute?)
No disk (see page 24, Error Message Table)
Buffer overflow (see page 24, Error Message Table)
Memory protect (see page 24, Error Message Table)
Currently receiving MIDI data.
4
Stand-by for saving MIDI data.
[c interval time.
Unformatted disk (see page 24, Error Message Table)
J
Currently reading data from disk or writing data to disk.