Advertisement
■ Data form and an explanation of how checksums
are calculated.
On VF-1, The data of Exclusive communication is in 4bit nibbles. Divide the value of DATA
section by that of SIZE section.
Example: Set UTILITY GLOBAL BPM on 180BPM
1. Refer to Parameter Address Map to calculate UTILITY GLOBAL BPM Address.
From ADDRESS BLOCK MAP, BASE ADDRESS of UTILITY BLOCK is
08 00 00H
Next, from UTILITY AREA TABLE, OFFSET ADDRESS of GLOBAL BPM PARAMETER
is
** 01 2CH
And then, calculate the actual address.
08 00 00H
BASE ADDRESS
+00 01 2CH
OFFSET ADDRESS
-----------
08 01 2CH
2. From UTILITY AREA TABLE, the value when at 180BPM is calculated to be B4H.
The data is in parameter's size-byte nibbles setting. From UTILITY AREA TABLE, data
size of GLOBAL BPM PARAMETER comes to 4-byte.
16bit
4bit MSB
0000_0000_1011_0100B 0000_0000B 0000_0000B 0000_1011B 0000_0100B
B4H
3. (1) through (7) are set according to Roland's format for Exclusive(SysEX) messages. Set
the data of 4-byte above-mentioned in order from MSB to LSB.
F0
41
00
00
23
12
08
(1) (2) (3) (4) (5) (6) ^^^^^^^^^^
(1) Exclusive Status
(2) Manufacture ID (Roland)
(3) Device ID (DEV:00H - 1FH)
(4) MODEL ID MSB (VF-1:00H)
(5) MODEL ID LSB (VF-1:23H)
(6) Common ID (DT1)
(7) Address
(8) Data (4bit nibbled, MSB first)
(9) Checksum
(10) End of Exclusive
4. The checksum (9) is calculated.
(7) Address + (8) Data =
08H + 01H + 2CH + 00H + 00H + 0BH + 04H = 44H(sum)
8
+
1
+ 44
+
0
+
0
68(sum) / 128 = 0(quotient)...68(remainder)
checksum = 128 - 68(remainder) = 60 = 3CH
5. From 3., 4, the message is completed.
F0
41
00
00
23
12
08
■ dummy Parameter
Data set on dummy Parameter is ignored.
00H
00H
0BH
01
2C
00
00
0B
04
???
^^^^^^^^^^^^^^
(9)
(7)
(8)
+ 11
+
4
= 68
01
2C
00
00
0B
04
3C
F7
4. ADDRESS MAPPING OF PARAMETER
The address and size are displayed under 7-bit hexadecimal notation.
Binary
7-bit Hexadecimal
Binary
7-bit Hexadecimal
■ Parameter base address
The actual address of each parameter is the start address of the block plus the offset address.
❍ Address Block Map
Base Address
00 00 00 +-------------------+ +-----------------+
| User Patch
|
00 04 00 |
|
LSB
|
:
|
04H
:
|
03 10 00 |
|
|
04 00 00 |
|
|
F7
:
|
(10)
:
|
07 10 00 |
|
+-------------------+ +-----------------+
08 00 00 +---------------------------------------+
| UTILITY
+---------------------------------------+
10 00 00 +---------------------------------------+
| TEMPORARY AREA
+---------------------------------------+
20 00 00 +---------------------------------------+
| INDIVIDUAL TEMPORARY AREA
+---------------------------------------+
60 00 00 +---------------------------------------+
| SOUND CHANGE REQUEST (SCR)
+---------------------------------------+
70 00 00 +---------------------------------------+
| PATCH WRITE REQUEST (PWR)
+---------------------------------------+
* The VF-1 can use two methods of communication; Individual Parameter and Bulk
Dump.
* Bulk data can be received when the Bulk Load Ready function is accessed in Utility
mode.
* Although individual data can be received at any time, be sure to appropriately describe
the value for one parameter in one packet [F0...F7].
* When a data request is to be received, use Bulk Load Ready in the utility.
* Parameters for which Size is 2 or higher should not be separated; make sure these are
sent in the same packet.
* A Sound Change Request (SCR) is valid only for the Temporary Area (Bulk). To Change
data in the Temporary Area(Bulk) using Exclusive(SysEx) messages, it is necessary to
first send the parameter data, then send the data to the SCR address.(refer to Table-
37.[SCR])
* Patch Write Request (PWR) is valid for User Patch and UTILITY MIDI PC MAP. If the
unit recognize this message, the data of User Patch and UTILITY MIDI PC MAP are
memorized. To memorize the data of User Patch and UTILITY MIDI PC MAP for Bulk/
Individual Area using Exclusive (SysEx) message, it is necessary to first send the
parameter data, then send the data to the PWR.(refer to Table-38.[PWR])
* For parameter marked with $, its type changes according to the setting of FX SELECT
parameter.
MIDI Implementation
Address
MSB
0aaa aaaa
0bbb bbbb
AA
BB
Size
MSB
0sss ssss
0ttt tttt
SS
TT
Block
Sub Block
| | USER PATCH A001 |••••Bulk
| +-----------------+
| +-----------------+
| | USER PATCH A002 |
| +-----------------+
|
:
|
:
| +-----------------+
| | USER PATCH A101 |
| +-----------------+
| +-----------------+
| | USER PATCH B001 |
| +-----------------+
|
:
|
:
| +-----------------+
| | USER PATCH B101 |
LSB
0ccc cccc
CC
LSB
0uuu uuuu
UU
Note
|••••Individual
|••••Bulk
|•••• Individual(Write Only)
|••••Individual
|••••Bulk
2
Advertisement
