Casio LK-270 MIDI Implementation - Page 26

19.3.4 dev : MIDI Device ID 00H-7FH Format: 0dddddddB The contents of this field in a received message are compared with the Model's MIDI Device ID, and receipt of the incoming message is allowed only when the two IDs match. When a message containing 7FH is received, receipt of the message is always allowed, regardless of the Instrument's ID setting. Note, however, that the Instrument does not have a specific Device ID, so use only 7FH for send and receive. 19.3.5 act : Action Format: 0aaaaaaaB aaaaaaaB = Action This field indicates the operation of the Instrument-specific System Exclusive Message. aaaaaaaB Action 00H NOP 01H IPR 02H IPS 03H OBR 04H OBS 05H HBR 06H HBS 0AH ACK 0BH BSY 0CH RJC 0DH EOD 0EH EOS 0FH ERR Function No Operation Individual Parameter Request Individual Parameter Send Oneway Bulk Parameter Set Request Oneway Bulk Parameter Set Send Handshake Bulk Parameter Set Request Handshake Bulk Parameter Set Send Acknowledge Busy Reject End of Data End of Session Error NOP: No Operation No operation is performed when this action is received. IPR: Individual Parameter Request Indicates an individual parameter value send request message. When the Instrument receives this action, it uses an IPS message to return the specified parameter value. IPS: Individual Parameter Send Indicates an individual parameter value send message. When the Instrument receives this action, it rewrites the value specified by the data field with the specified parameter value. OBR: Oneway Bulk Parameter Set Request Indicates a send request message using parameter set image one-way mode. When the Instrument receives this action, it uses an OBS message to return the specified parameter set. OBS: Oneway Bulk Parameter Set Send Indicates a parameter set image send message using one-way mode. The parameter set to be transferred is divided into multiple packets when it is greater than a prescribed size. At this time, packets are transferred at intervals of the prescribed time (20 msec) or greater. HBR: Handshake Bulk Parameter Set Request Indicates a send request message using the parameter set image handshake mode. When the Instrument receives this action, it uses an HBS message to return the specified parameter set. 26