Casio CTK-4200 Midi Implementation Manual

Also see for CDP-220R: User guide

Casio CTK-4200 Midi Implementation Manual Manual pdf 29 page image

19.3.18 EOX : End of System Exclusive MessageFormat: 11110111BThis is the End of System Exclusive Message status byte established by the MIDI standard.20 Individual Parameter OperationsThere are two parameter unit operations: Individual Parameter Transfer and Individual ParameterRequest. For one session, in response to an IPR (Individual Parameter Request) from an externaldevice, this Instrument returns an IPS (Individual Parameter Send) or the session is concluded whenthe external device or this Instrument spontaneously sends an IPS. If this Instrument received an IPS,the value of the applicable parameter is changed. Depending on the function of a parameter, IndividualParameter Send may be used to issue a command to the Instrument and Individual Parameter Requestmay be used to check Instrument status information.Data Receiver Data Sender OperationIPR Send Request(Optional)IPS Data Transfer21 Parameter Set Transfer21.1 Communication Modes21.1.1 One-way and HandshakeIn order to ensure maximum speed for bulk dumping of Parameter Sets, the data format is different fromthe data format used for Individual Parameter Send. Data is transferred as-is, using the Model’s memoryimage. Parameter Sets can be transferred by bulk dump using the message exchange types describedbelow.• One-way mode Parameter Set send/receive• One-way mode Parameter Set send request send/receive• Handshake mode Parameter Set send/receive• Handshake mode Parameter Set send request, receive rejected, error notification send/receiveWith the one-way mode, the sending device sends data and ends the session without regard to theresponse of the receiving device. This mode is best for one-way transfers from a sequencer or similardevice.With the handshake mode, the sending device sends the data and then waits for a response from thereceiving device before advancing to the next session. This is a high-speed mode in which there is notime wasted waiting.See “VI Parameter Set List” for details about Instrument parameter sets.21.1.2 Session and SubsessionSubsession “One subsession” refers to transfer of one parameter set. A subsession transfers oneparameter set or a parameter set that has been divided into multiple packets for transfer, with EOD(End of Data) at the end to terminate the send. Division of a parameter set into multiple packets isused when the size of the parameter set is greater than a prescribed size. The packet number in thepacket index field indicates the sequential position of a packet relative to the other packets. A singlepacket cannot be used to transfer multiple small parameter sets. A parameter set delimiter always mustbe transferred as a packet delimiter.29