Yamaha DM2000 - Manual (Page 371)

Format Details
371
DM2000 Version 2—Owner’s Manual
11. ACTIVE SENSING (FE)
Reception
Once this message has been received, the failure to receive any message for
an interval of 400 ms or longer will cause MIDI transmission to be initial-
ized, such as by clearing the Running Status.
12. SYSTEM RESET (FF)
Reception
When this message is received, MIDI communications will be cleared, e.g.,
by clearing the Running Status.
13. SYSTEM EXCLUSIVE MESSAGE (F0)
13.1 MIDI TIME CODE (FULL MESSAGE)
The Automix synchronizes these messages when they are received at a port
specified by the TIME REFERENCE setting.
13.2 MIDI MACHINE CONTROL (MMC)
These messages are transmitted when the Machine Control section of the
DM2000 is operated.
13.3 BULK DUMP
This message sends or receives the contents of various memories stored
within the DM2000.
The basic format is as follows.
For DUMP DATA
For DUMP REQUEST
A unique header (Model ID) is used to determine whether the device is a
DM2000.
CHECK SUM is obtained by adding the bytes that follow BYTE COUNT
(LOW) and end before CHECK SUM, taking the binary compliment of
this sum, and then setting bit 7 to 0.
CHECK SUM = (-sum)&0x7F
The DM2000 can transmit and receive BULK data only if the size of a
MIDI packet (F0 - F7) is 4096 bytes or smaller.
If large data consists of multiple MIDI packets, they can be transferred se-
quentially.
Reception
This message is received if [Bulk RX] is ON and the [Rx CH] matches the
device number included in the SUB STATUS.
When a bulk dump is received, it is immediately written into the specified
memory.
When a bulk dump request is received, a bulk dump is immediately trans-
mitted.
Transmission
This message is transmitted on the [Tx CH] by key operations in the [MI-
DI]-[BULK DUMP] screen.
A bulk dump is transmitted on the [Rx CH] in response to a bulk dump
request.
The data area is handled by converting seven words of 8-bit data into eight
words of 7-bit data.
Conversion from actual data into bulk data
d[0~6]: actual data
b[0~7]: bulk data
b[0] = 0;
for( I=0; I<7; I++){
if( d[I]&0x80){
b[0] |= 1<<(6-I);
}
b[I+1] = d[I]&0x7F;
}
Restoration from bulk data into actual data
d[0~6]: actual data
b[0~7]: bulk data
for( I=0; I<7; I++){
b[0] <<= 1;
d[I] = b[I+1]+(0x80&b[0]);
}
13.3.1 Scene memory bulk dump format
(compressed data)
The DM2000 can transmit and receive scene memories in compressed
form.
13.3.2 Scene memory bulk dump request format
(compressed data)
The second and third bytes of the DATA NAME indicate the scene number
that is being requested. If this is 256, the data of the Edit Buffer will be
bulk-dumped. If this is 8192, the data of the Undo Buffer will be
bulk-dumped.
STATUS 11111110 FE Active sensing
STATUS 11111111 FF System reset
F0 43 0n 7E cc cc <Model ID> tt mm mm [Data ...]
cs F7
F0 43 2n 7E <Model ID> tt mm mm F7
n Device Number
cc cc DATA COUNT (the number of bytes that follow this, ending
before the checksum)
<Model ID> Model ID (for DM2000, 4C 4D 20 20 38 43 31 32)
tt DATA TYPE
mm mm DATA NUMBER
cs CHECK SUM
STATUS 11110000 F0 System exclusive message
ID No. 01000011 43 Manufacture's ID number (YAMAHA)
SUB STATUS 0000nnnn 0n n=0-15 (Device number=MIDI Channel)
FORMAT No. 01111110 7E Universal bulk dump
COUNT HIGH 0ccccccc ch data count = ch * 128 + cl
COUNT LOW 0ccccccc cl
01001100 4C 'L'
01001101 4D 'M'
00100000 20 ' '
00100000 20 ' '
00111000 38 '8'
01000011 43 'C'
00110001 31 '1'
00110010 32 '2'
DATA NAME 01101101 6D 'm'
0mmmmmmm mh m=0-99, 256, 8192 (Scene0-99, EDIT
BUFFER, UNDO)
0mmmmmmm ml Receive is effective 1-99, 256, 8192
BLOCK INFO. 0ttttttt tt total block number (minimum number
is 0)
0bbbbbbb bb current block number (0-total block
number)
DATA 0ddddddd ds Scene data of block[bb]
:
:
0ddddddd de
CHECK SUM 0eeeeeee ee ee= (Invert ('L'+...+de)+1)&0x7F
EOX 11110111 F7 End of exclusive
STATUS 11110000 F0 System exclusive message
ID No. 01000011 43 Manufacture's ID number (YAMAHA)
SUB STATUS 0010nnnn 2n n=0-15 (Device number=MIDI Channel)
FORMAT No. 01111110 7E Universal bulk dump
01001100 4C 'L'
01001101 4D 'M'
00100000 20 ' '
00100000 20 ' '
00111000 38 '8'
01000011 43 'C'
00110001 31 '1'
00110010 32 '2'
DATA NAME 01101101 6D 'm'
0mmmmmmm mh m=0-99, 256, 8192 (Scene0-99, EDIT
BUFFER, UNDO)