JM-5 MIDI Implementation
10
●
POLY (Controller number 127)
• The corresponding channel is set to Mode 3.
■
System Realtime Messages
●
Active Sensing
• This message is transmitted at intervals of approximately 250 ms.
● Timing Clock
● Start
● Continue (Song playback only)
• This message is transmitted when the sequencer is not started from the
beginning.
● Stop
■ System Common Messages
● Song Position Pointer
■ System Exclusive Messages
❍
GS reset
GS Reset is a message that resets the internal settings of a device to the GS
initial state. This message appears at the beginning of GS music data, and a
GS device that receives this message will automatically be set to the proper
state to correctly play back GS music data.
3. Individual parameter transmission and
reception
Individual Parameter Transmission transmits data (or requests data) for one
parameter as one exclusive message (one packet of “F0 ..... F7”).
In Individual Parameter Transmission, you must use the Address and Size list-
ed in the following "Parameter Address Map". Addresses marked at "#" cannot
be used as starting addresses.
■ System Exclusive messages
Data Set 1 (DT1) is the only System Exclusive messages transmitted by the
JM-5.
● Data set 1 DT1 (12H)
• 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.
•Data larger than 128 bytes will be divided into packets of 128 bytes or
less, and each packet will be sent at an interval of about 40 ms.
•Regarding the checksum, please refer to “Example of an Exclusive mes-
sage checksum calculation” on page 15.
Status
2nd byte 3rd byte
BnH 7FH 00H
n= MIDI channel number: 0H~FH (Ch.1~16)
Status
FEH
Status
F8H
Status
FAH
Status
FBH
Status
FCH
Status
2nd byte 3rd byte
F2H XXH YYH
XX= Song Position ( Bar ) LSB
YY= Song Position ( Bar ) MSB
Status
Data byte Status
F0H iiH, ddH, ......,eeH F7H
F0H: System Exclusive Message status
ii= ID number: an ID number (manufacturer ID) to indicate the
manufacturer whose Exclusive message this is. Roland 's man-
ufacturer ID is 41H.
ID numbers 7EH and 7FH are extensions of the MIDI standard;
Universal Non-realtime Messages (7EH) and Universal Real-
time Messages (7FH).
dd,...,ee= data: 00H~7FH (0~127)
F7H: EOX (End Of Exclusive)
Status
Data byte Status
F0H 41H, dev, 42H, 12H, 40H, 00H, 7FH, 00H, 41HF7H
Byte
Explanation
F0H Exclusive status
41H ID number (Roland)
dev Device ID (dev: 00H~1FH (1~32),
Initial value is 10H (17))
42H Model ID (GS)
12H Command ID (DT1)
40H Address MSB
00H Address
7FH Address LSB
00H Data (GS reset)
41H Checksum
F7H EOX (End Of Exclusive)
Status
Data byte Status
F0H 41H, dev, 42H, 12H, aaH, bbH, ccH, ddH, ... eeH, sumF7H
Byte
Explanation
F0H Exclusive status
41H ID number (Roland)
dev Device ID (dev: 00H~1FH, Initial value is 10H)
42H Model ID (GS)
12H Command ID (DT1)
aaH Address MSB: upper byte of the starting address of the
data to be sent
bbH Address: middle byte of the starting address of the data
to be sent
ccH Address LSB: lower byte of the starting address of the
data to be sent.
ddH Data: the actual data to be sent. Multiple bytes of data
are transmitted in order starting from the address.
: :
eeH Data
sum Checksum
F7H EOX (End Of Exclusive)
