Yamaha DX7 II FD Supplemental Booklet page 43

MIDI Data Recorder Functions
Recording Incoming MIDI
The DX7 II FD's disk drive can be used to record a variety of system exclusive MIDI data.
This includes sequence data, voice data, rhythm pattern data, and other useful bulk
memory data. You might for example store sequence data from a QX5 sequencer which
has no built-in disk drive.
The MIDI equipment transmitting the data you wish to store must be able
system exclusive messages without a "dump request". In other words, it must be able to
transmit its data without receiving a request from another device. It must also be able to
send data in bulks that are no larger than
20K
split up into
Data Recording external MIDI data is a two-step process. First, the DX must receive the
incoming data. This is temporarily placed in a buffer. Next, you must write this data to
disk assigning a name to the new file. The DX7 II will ignore any data that exceeds the
20K byte maximum per file.
20
segments within the transmitting equipment.
- 3 9 -
kilobytes. Larger volumes of data must
output
to
be