Publicidad
RECORD EXIT
Status
Data Bytes
F0H
7FH, 7FH, 06H, 07H
Byte
Description
F0H
Status of System Exclusive Message
7FH
Universal System Exclusive Message Realtime Header
7FH
Device ID
06H
MMC Command Message
07H
RECORD EXIT
F7H
EOX (End of System Exclusive Message)
If the transport switch [REC] was pressed while recording, the CDX-1 transmits as the
device ID 7FH.
MMC RESET
Status
Data Bytes
F0H
7FH, 7FH, 06H, 0DH
Byte
Description
F0H
Status of System Exclusive Message
7FH
Universal System Exclusive Message Realtime Header
7FH
Device ID
06H
MMC Command Message
0DH
MMC RESET
F7H
EOX (End of System Exclusive Message)
When powered on and song loaded the CDX-1 transmits as the device ID 7FH.
LOCATE (MCP)
Format 2-LOCATE [TARGET]
Status
Data Bytes
F0H
7FH, 7FH, 06H, 44H, 06H, 01H, hrH, mnH, scH, frH, ffH
Byte
Description
F0H
Status of System Exclusive Message
7FH
Universal System Exclusive Message Realtime Header
7FH
Device ID
06H
MMC Command Message
44H
LOCATE (MCP)
06H
Number of Bytes
01H
"TARGET" sub command hrH, mnH, scH, frH, ffH
Standard Time with Sub Frame
F7H
EOX (End of System Exclusive Message)
If the efficient locate switch is pressed, the CDX-1 transmits as the device ID 7FH.
The efficient Information Field
The followings are the efficient Information Field on the CDX-1.
The name of the efficient destination Information Field:
01H SELECTED TIME CODE
08H GP0 / LOCATE POINT
09H GP1
0AH GP2
0BH GP3
0CH GP4
0DH GP5
0EH GP6
0FH GP7
4FH TRACK RECORD READY
Status
F7H
Status
F7H
Status
F7H
7. Appendices
Decimal and Hexadecimal table
(Hexadecimal number is shown with H.)
In MIDI documentation, data values and addresses/sizes of system exclusive messages etc.
are expressed as hexadecimal values for each 7 bits.
The following table shows how these correspond to decimal numbers.
+——————+——————++——————+——————++——————+——————++—————————————+
|
dec |
hex ||
dec |
hex ||
+——————+——————++——————+——————++——————+——————++——————+——————+
|
0 |
00H ||
32 |
20H ||
|
1 |
01H ||
33 |
21H ||
|
2 |
02H ||
34 |
22H ||
|
3 |
03H ||
35 |
23H ||
|
4 |
04H ||
36 |
24H ||
|
5 |
05H ||
37 |
25H ||
|
6 |
06H ||
38 |
26H ||
|
7 |
07H ||
39 |
27H ||
|
8 |
08H ||
40 |
28H ||
|
9 |
09H ||
41 |
29H ||
|
10 |
0AH ||
42 |
2AH ||
|
11 |
0BH ||
43 |
2BH ||
|
12 |
0CH ||
44 |
2CH ||
|
13 |
0DH ||
45 |
2DH ||
|
14 |
0EH ||
46 |
2EH ||
|
15 |
0FH ||
47 |
2FH ||
|
16 |
10H ||
48 |
30H ||
|
17 |
11H ||
49 |
31H ||
|
18 |
12H ||
50 |
32H ||
|
19 |
13H ||
51 |
33H ||
|
20 |
14H ||
52 |
34H ||
|
21 |
15H ||
53 |
35H ||
|
22 |
16H ||
54 |
36H ||
|
23 |
17H ||
55 |
37H ||
|
24 |
18H ||
56 |
38H ||
|
25 |
19H ||
57 |
39H ||
|
26 |
1AH ||
58 |
3AH ||
|
27 |
1BH ||
59 |
3BH ||
|
28 |
1CH ||
60 |
3CH ||
|
29 |
1DH ||
61 |
3DH ||
|
30 |
1EH ||
62 |
3EH ||
|
31 |
1FH ||
63 |
3FH ||
+——————+——————++——————+——————++——————+——————++——————+——————+
* Decimal values such as MIDI channel, bank select, and program change are listed as one
(1) greater than the values given in the above table.
* A 7-bit byte can express data in the range of 128 steps. For data where greater precision
is required, we must use two or more bytes. For example, two hexadecimal numbers aa
bbH expressing two 7-bit bytes would indicate a value of aa x 128 + bb.
* In the case of values which have a ± sign, 00H = -64, 40H = ±0, and 7FH = +63, so that
the decimal expression would be 64 less than the value given in the above chart. In the
case of two types, 00 00H = -8192, 40 00H = ±0, and 7F 7FH = +8191.
* Data marked "nibbled" is expressed in hexadecimal in 4-bit units. A value expressed as a
2-byte nibble 0a 0bH has the value of a x 16 + b.
<Ex.1> What is 5AH in decimal system?
5AH = 90 according to the above table.
<Ex.2> What in decimal system is 12034H in hexadecimal of every 7 bit?
12H = 18, 34H = 52 according to the above table. So 18 x 128 + 52 = 2356.
<Ex.3> What in decimal system is 0A 03 09 0D in nibble system?
0AH = 10, 03H = 3, 09H = 9, 0DH = 13 according to the table.
So ((10 x 16 + 3) x 16 + 9) x 16 + 13 = 41885.
<Ex. 4> What in nibble system is 1258 in decimal system?
____
16)1258
16) 78 ... 10
16)
4 ... 14
0 ... 4
0 = 00H, 4 = 04H, 14 = 0EH, 10 = 0AH According to the table.
So it is 00 04 0E 0AH.
Example of system exclusive message and Checksum calculation
On Roland system exclusive message (DT1), checksum is added at the end of transmitted
data (in front of F7) to check the message is received correctly. Value of checksum is defined
by address and data (or size) of the system exclusive message to be transmitted.
MIDI Implementado
dec |
hex ||
dec |
hex |
64 |
40H ||
96 |
60H |
65 |
41H ||
97 |
61H |
66 |
42H ||
98 |
62H |
67 |
43H ||
99 |
63H |
68 |
44H ||
100 |
64H |
69 |
45H ||
101 |
65H |
70 |
46H ||
102 |
66H |
71 |
47H ||
103 |
67H |
72 |
48H ||
104 |
68H |
73 |
49H ||
105 |
69H |
74 |
4AH ||
106 |
6AH |
75 |
4BH ||
107 |
6BH |
76 |
4CH ||
108 |
6CH |
77 |
4DH ||
109 |
6DH |
78 |
4EH ||
110 |
6EH |
79 |
4FH ||
111 |
6FH |
80 |
50H ||
112 |
70H |
81 |
51H ||
113 |
71H |
82 |
52H ||
114 |
72H |
83 |
53H ||
115 |
73H |
84 |
54H ||
116 |
74H |
85 |
55H ||
117 |
75H |
86 |
56H ||
118 |
76H |
87 |
57H ||
119 |
77H |
88 |
58H ||
120 |
78H |
89 |
59H ||
121 |
79H |
90 |
5AH ||
122 |
7AH |
91 |
5BH ||
123 |
7BH |
92 |
5CH ||
124 |
7CH |
93 |
5DH ||
125 |
7DH |
94 |
5EH ||
126 |
7EH |
95 |
5FH ||
127 |
7FH |
207
Publicidad
Capítulos
