254
MIDI Implementation
❍
Data Request 1 RQ1 (11H)
This message requests the other device to transmit data. The address
and size indicate the type and amount of data that is requested.
When a Data Request message is received, if the device is in a state
in which it is able to transmit data, and if the address and size are
appropriate, the requested data is transmitted as a Data Set 1 (DT1)
message. If the conditions are not met, nothing is transmitted.
status
data byte status
F0H 41H, dev, 00H, 00H, 25H, 11H, aaH, bbH, F7H
ccH, ddH, ssH, ttH, uuH, vvH, sum
Byte Remarks
F0H Exclusive status
41H ID number (Roland)
dev device ID (dev: 10H - 1FH, 7FH)
00H model ID #1 (SonicCell)
00H model ID #2 (SonicCell)
25H model ID #3 (SonicCell)
11H command ID (RQ1)
aaH address MSB
bbH address
ccH address
ddH address LSB
ssH size MSB
ttH size
uuH size
vvH size LSB
sum checksum
F7H EOX (End Of Exclusive)
* The size of data that can be transmitted at one time is fixed for
each type of data. And data requests must be made with a fixed
starting address and size. Refer to the address and size given in
“Parameter Address Map” (p. 257).
* For the checksum, refer to (p. 275).
* Not received when the Receive Exclusive parameter (System
MIDI) is OFF.
❍
Data set 1 DT1 (12H)
Status Data byte Status
F0H 41H, dev, 00H, 00H, 25H, 12H, aaH, bbH, F7H
ccH, ddH, eeH, ... ffH, sum
Byte Explanation
F0H Exclusive status
41H ID number (Roland)
dev Device ID (dev: 00H - 1FH, 7FH)
00H Model ID #1 (SonicCell)
00H Model ID #2 (SonicCell)
25H Model ID #3 (SonicCell)
12H Command ID (DT1)
aaH Address MSB: upper byte of the starting address of
the data to be sent
bbH Address: upper middle byte of the starting
address of the data to be sent
ccH Address: lower middle byte of the starting
address of the data to be sent
ddH Address LSB: lower byte of the starting address of
the data to be sent.
eeH Data: the actual data to be sent. Multiple
bytes of data are transmitted in
order starting from the address.
: :
ffH Data
sum Checksum
F7H EOX (End Of Exclusive)
* The amount of data that can be transmitted at one time depends
on the type of data, and data will be transmitted from the
specified starting address and size. Refer to the address and size
given in “Parameter Address Map” (p. 257).
* Data larger than 256 bytes will be divided into packets of 256 bytes
or less, and each packet will be sent at an interval of about 20 ms.
* Regarding the checksum, please refer to (p. 275)
* Not received when the Receive Exclusive parameter (System
MIDI) is OFF.
Status
Data byte Status
F0H 41H, dev, 42H, 12H, aaH, bbH, F7H
ccH, ddH, ... eeH, sum
Byte
Explanation
F0H Exclusive status
41H ID number (Roland)
dev Device ID (dev: 10H - 1FH, 7FH)
42H Model ID (GS)
12H Command ID (DT1)
aaH Address MSB: upper byte of the starting address of
the transmitted data
bbH Address: middle byte of the starting address
of the transmitted data
ccH Address LSB: lower byte of the starting address of
the transmitted data
ddH Data: the actual data to be transmitted.
Multiple bytes of data are
transmitted starting from the
address.
: :
eeH Data
sum Checksum
F7H EOX (End Of Exclusive)
* The amount of data that can be transmitted at one time depends
on the type of data, and data will be transmitted from the
specified starting address and size. Refer to the address and size
given in “Parameter Address Map” (p. 257).
* Data larger than 256 bytes will be divided into packets of 256 bytes
or less, and each packet will be sent at an interval of about 20 ms.
* Regarding the checksum, please refer to (p. 275)
* Not received when the Receive Exclusive parameter (System
MIDI) is OFF.
SonicCell_e.book 254 ページ ２００７年８月９日 木曜日 午後９時１７分
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