Roland VS-890 - Manual (Page 125)

MIDI Implementation
4. Appendices
e Decimal and Hexadecimal table
(Hexadecimal number is. shown with H.)
In MIDI documentation, data values and nddresses/si/es of system exclusive messages etc.
are expressed as hexadecimal values for each 7 bits.
The following fable show's how these correspond to decimal numbers.
i dec hex ! dec hex ( dec hex I dec hex
0 QOH 32 20H 64 40H 96 60H
1 OlH 33 21H 65 41H 97 61H
2 02H 34 22H 66 42K 99 62H
3 03H 35 23K 67 43H 99 63H
4 04H 36 24H 69 44K 100 64H
5 05K 57 25H 69 45K 101 65H
6 06H 30 26H 70 46H 102 66H
7 07H 39 27K 71 47K 103 67H
0 OfiH 40 2EH 72 4BH 104 6BH
Э 09H 41 2SH 73 4 9H 105 69H
10 OAH 42 2AH 74 4ЛН 106 6AH
11 OBH 43 2BH 75 4BH 107 6БН
12 OCH 44 2СЯ 75 4CK 108 6CH
13 ODH 45 2DH 77 4 OH 109 6DH
14 OEH 46 2 EH 79 4EH 110 6 EH
15 OFH 47 2FH 79 4FH m 6FH
1€ iOH 48 3CH 80 50K 112 7QH
17 IIK 49 31H 01 51H 113 71H
19 12H 50 32H 82 53H 114 72H
19 : з к 51 33H S3 53H 115 73H
20 14H 52 34H 04 S4H 116 74H
21 15H 53 35H 05 55H 117 75H
22 16H 54 36H 6 6 5eH 116 76H
23 17H 55 37H 67 57H 119 77H ■
24 : е н 56 39H 0 6 5SH 120 7SH
25 1ЭН 57 Э5Н 09 59H 121 79H
2£ lAH 58 3AH 90 5AH 122 7АЙ
27 lEH 59 3BH 91 5BH 123 75H
28 ICH 60 3CH 92 5CH 124 7CH
29 IDH 61 3DH • 93 50H 125 7DH ,
30 lEH 62 3EH ; 94 5EH 126 7EH '
i 31 IFK 63 3FK ; 95 5FH 127 7FH '
* 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 126 steps. For data where greater precision
is required, we must use two or more bytes. For example, Iwo hexadecimal numbers aa
bbH expressing two 7-bit bytes would indicate a value of aa x 126 + bb.
* In the case of values which have a +/- sign, ООН - -64, 40H = +/- 0, and 7FH = ^63, so
that the decimal expression w’outd be 64 less than the value given in the above chart. In
the case of Iwo types, 00 ООН = -8192,40 ООН = ч-/-0, and 7F 7FH = +6191.
* Diita marked nibbled" is expressed in hexadecimal in 4-bit units. A value expressed as a
2-b)’le nibble Oa ObH has the value of a \ 16 + b.
<Ex.l> What is 5AH in decimal system?
5AH = ад according to the above table.
«iEx.2>VVhat in decimal system is 12034H in hexadecimal of every 7 bil?
12H = 18.34H = 52 according to the above table. So 18 \ 128 + 52 = 2356.
<ExJ> What in decimal system is OA 03 09 OD in nibble system?
OAH = 10,03H = 3,09H » 9, ODH = 13 according to the table.
So «10 \ 16 + .3) X 16 + 9) X 16 * 13 = 41883.
<Ex. 4> What in nibble system is 1256 in decimal system?
161:259
161 79 . , . . 10
16! 4 - ,. 14
0 , . 4
0 = ШН. 4 = 04H, 14 = OEH. 10 = OAH According to the table.
So it is 00 04 OE OAH.
•Example of system exclusive message and Checksum
calculation
On Roland sx'Stem exclusive message (DTI), checksum is added at the end of transmitted
data (in front of F7) to check the message is received correctly. Value of dtecksum is defined
by address and data (or size) of the sv'Stem exclusive message to be transmitted.
How to calculate checksum
(Hexadedmai number is shown with H.)
Checksum is a value w'hich lower 7 bit of the sum of address, size and checksum itself turns
tobeO.
if the address of the system exclusive message to be transmitted i.s aa bb ccH and data nr
size is dd ee ffH,
aa + bb + cc + dd + ee + ff = sum
sum / 128 s quotient and odd
When odd Is 0.0 = checksum
When odd is other than 0,128 • odd » checksum
■MIDI Machine Control (MMC) Command,
Information Field / Response Reference
•Commands Recognized
Command
01H STOP
02H PLAY
03H DEFERRED PLAY
04H FAST FORWARD
OSH REWIND
06H RECORD STROBE
07H RECORD EXIT
ODH MMC RESET
40H WRITE
41H MASKED WRITE
44H ООН LOCATE l/F
44H 01H LOCATE TARGET
4CH MOVE
Action
STOP
PLAY
PLAY
FF
REW
REC / PUNCH IN
PUNCH OUT
RESET
Write to Information Fields
Set Track Status Information Fields
LOCATE (Read Locator)
LOC.ATE (Designated Time)
Move between Information fields
•Commands Transmitted
CDmmaiKl
OlHSTOP
03H DEFERRED PLAY
ОбН RECORD STROBE
07H RECORD EXIT
ODH MMC RESET
Action
STOP
PLAY
REC / PUNCH IN
PUNCH OUT
RESET
44H 01H LOCATE TARGET LOCATE
•Valid Information Fields / Response
InfafTOBtion Field
OlH SELECTED TIMECODE
08H GPO / LOCATE Ю1МТ
09H GPl
OAH CP2
OBH GP3
OCH GP4
ODH CPS
OEH CP&
OFH GP7
Current Time
Locator 1
Locator 2
Locator .1
Locator 4
Locator S
Locator 6
Locator 7
Locator 8
4FH TR.ACK RECORD READY Track Status
MOVE(FROM)
MOVE(FROM), MOVEfTO).
MOVE(FROM), MOVEfTO),
MOVE(FROM), MOVEfTO),
кЮУЩРЯОМ). MOVEfTO).
MOVE(FROM), MOVEfTO),
MOVEfFROM), MOVEfTO).
MOVE(FROM), MOVEfTO),
MOVEfFROM), MOVEfTO),
MASKED WRITE WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
WRITE
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