Casio CDP-220R - Manual (Page 20)

18.1.10 GS Message
Message Format: F0H 41H ddH 42H 12H 40H 00H 7FH 00H 41H F7H
dd: Device ID(Ignored)
Send This message is not sent by this Instrument.
Receive Receipt performs the same operation as when the GM System On message is received.
18.2 Instrument-Specific System Exclusive Message
Message Format: F0H 44H 16H 02H ... F7H
This message can be used to send the Instrument memory status, for two-way transfer of special
operation commands and user data, to perform sound source parameter operations, etc. For more
information, see “IV Instrument-Specific System Exclusive Messages”.
20