Yamaha DM 2000 Manual De Instrucciones página 383

11. ACTIVE SENSING
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.
STATUS 11111110 FE
12. SYSTEM RESET
Reception
When this message is received, MIDI communications will be cleared, e.g.,
by clearing the Running Status.
STATUS 11111111 FF
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
F0 43 0n 7E cc cc <Model ID> tt mm mm [Data ...]
cs F7
For DUMP REQUEST
F0 43 2n 7E <Model ID> tt mm mm F7
Device Number
n
DATA COUNT (the number of bytes that follow this, ending
cc cc
before the checksum)
Model ID (for DM2000, 4C 4D 20 20 38 43 31 32)
<Model ID>
DATA TYPE
tt
DATA NUMBER
mm mm
CHECK SUM
cs
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.
(FE)
Active sensing
(FF)
System reset
Format Details
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.
System exclusive message
STATUS 11110000 F0
Manufacture's ID number (YAMAHA)
ID No. 01000011 43
n=0-15 (Device number=MIDI Channel)
SUB STATUS 0000nnnn 0n
Universal bulk dump
FORMAT No. 01111110 7E
data count = ch * 128 + cl
COUNT HIGH 0ccccccc ch
COUNT LOW 0ccccccc cl
'L'
01001100 4C
'M'
01001101 4D
' '
00100000 20
' '
00100000 20
'8'
00111000 38
'C'
01000011 43
'1'
00110001 31
'2'
00110010 32
'm'
DATA NAME 01101101 6D
m=0-99, 256, 8192 (Scene0-99, EDIT
0mmmmmmm mh
BUFFER, UNDO)
Receive is effective 1-99, 256, 8192
0mmmmmmm ml
total block number (minimum number
BLOCK INFO. 0ttttttt tt
is 0)
current block number (0-total block
0bbbbbbb bb
number)
Scene data of block[bb]
DATA 0ddddddd ds
:
:
0ddddddd de
ee= (Invert ('L'+...+de)+1)&0x7F
CHECK SUM 0eeeeeee ee
End of exclusive
EOX 11110111 F7
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.
System exclusive message
STATUS 11110000 F0
Manufacture's ID number (YAMAHA)
ID No. 01000011 43
n=0-15 (Device number=MIDI Channel)
SUB STATUS 0010nnnn 2n
Universal bulk dump
FORMAT No. 01111110 7E
'L'
01001100 4C
'M'
01001101 4D
' '
00100000 20
' '
00100000 20
'8'
00111000 38
'C'
01000011 43
'1'
00110001 31
'2'
00110010 32
'm'
DATA NAME 01101101 6D
m=0-99, 256, 8192 (Scene0-99, EDIT
0mmmmmmm mh
BUFFER, UNDO)
DM2000 Version 2—Manual de Instrucciones
383