Technics SX FA1 Organ

Classification of data dump areas
Data du mp ar ea :
Sound Memory
Panel
Composer
Sequencer
(Header+ Parameter )
(Panel data+ Panel Memory)
(Location+ Header+ Performa nce)
(Location+ Header+ Performance)
One-way transmission and handshake transmission
In
one-way transmission,communication takes place
in one direction
only,that is -from the master unit to
the slave unit.
In
handshake transmission,the transmission status
between the master unit and slave unit is being
confirmed
during data transmission. For this reason,
a MIDI cable connection from the slave u nit to the
master unit is also necessary . In comparison to one -
way transmission, handshake transmission is faster.
MIDI OUT MIDI IN
Master unit Slave unit
MIDI IN MIDI OUT
In the F Al , the transmission mode is switched
automatica ll y between handshake transmission and
one-way transmission. Communication begins with
handshake transmission, and if there is no response
from the slave unit within a given time,
commu n ica ti on switc h es automatica lly to one - way
transmission.
Communication sequence between master unit and slave unit
• Comunication sequence of handshake
confirmation
Master unit Slave unit
HRQ comma nd
HRTcommand
HRTcommand
ACK
HRO command: handshake request
SOX FOH
IDC
HRQ
PC
MD
VER
EOX
50H
21H
03H
40H
lOH
F7H
HRT command: handshake routine
SOX FOH
IDC
HRT
PC
MD
VER
EOX
ACK:
sox
IDC
ACK
DMY
EOX
50H
22H
03H
40H
l
OH
F7H
Acknowledge
FOH
50H
23H
7EH
F7H
· There is no END command .
· If there is no response from the slave unit to the
maste r unit even after the above handshake
confirmation routine is performed three times,it
is
interpreted as inability to transmit hands h ake
transm i ssion data, and the transmission mode
switches to one-way transmission (in the case
of a MIDI sequencer, etc.) .
·Handshake commun i cation is possible only
du
ring data dump.
t