233
Appendices
2. Transmit data
■System Realtime Message
●Active sensing
Status
FEH
* This will be transmitted constantly at intervals of approximately 250 ms.
■System Exclusive messages
“Identity Reply” and “Data Set 1 (DT1)” are the only System Exclusive messages
transmitted by the SC-8850.
When an appropriate “Identity Request Message” and “Data Request 1 (RQ1)” message are
received, the requested internal data will be transmitted.
❍Identity Reply
Status Data byte Status
F0H 7EH, dev, 06H, 02H, 41H, 42H, 00H, 00H, 06H, ssH, ssH, ssH, ssH F7H
Byte Explanation
FOH Exclusive status
7EH ID number (Universal Non-realtime Message)
dev Device ID (use the same as the device ID of Roland)
06H Sub ID#1 (General Information)
02H Sub ID#2 (Identity Reply)
41H ID number (Roland)
42H Device family code (LSB)
00H Device family code (MSB)
00H Device family number code (LSB)
06H Device family number code (MSB)
ssH Software revision level
ssH Software revision level
ssH Software revision level
ssH Software revision level
F7H EOX (End of Exclusive)
* Reply the message by the unique device ID (dev) when the device has received the
“Identity Request Message” in the Broadcast.
❍Data set 1DT1 (12H)
Status Data byte Status
F0H 41H, dev, 42H, 12H, aaH, bbH, ccH, ddH, ... eeH, sum F7H
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)
* 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 Section 3. Individual Parameter Transmission (page 233).
* 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 Section 5 (p.245)
There are two ways in which GS data is transmitted: Individual Parameter Transmission
(Section 3 page 233) in which individual parameters are transmitted one by one, and Bulk
Dump Transmission (Section 4 page 242) in which a large amount of data is transmitted at
once.
3. Individual Parameter Transmission
(Model ID=45H or 42H)
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 listed in the
following “Parameter Address Map”. Addresses marked by “#” cannot be used as starting
addresses.
■Address Block map
An outlined address map of the Individual Parameter Transmission is as follows;
<Model ID = 45H>
fig.11-14e
<Model ID = 42H>
●Port-A
fig.11-15e
Address (H)
10 00 00
Display Data
Block
Address (H)
00 00 00
20 00 00
21 00 00
40 00 00
40 10 00
41 00 00
SYSTEM
USER TONE BANK
USER DRUM SET
PATCH PART
(BLOCK00-0F)
DRUM SETUP
Block
A
A
PATCH COMMON
#A
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