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MPX 1 V1.10 MIDI Implementation Details
Each custom character is 5 pixels wide by 7 pixels high with one additional row of pixels on the bottom
for the underline. When loading custom characters, the data is transferred as 8 bytes of data, each
representing one row of the character starting from the top. Each bit of the byte corresponds to one pixel
with 1 turning the pixel on and 0 turning it off. Because each character is only 5 pixels wide, the top 3 bits
are not used. As a result, all characters will either have a 1 or a 0 in the high nibble. For example, the letter
'T' would be represented as follows:
0x1f, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x00
row
binary
hex
0 - 0001 1111 0x1f
1 - 0000 0100 0x04
2 - 0000 0100 0x04
3 - 0000 0100 0x04
4 - 0000 0100 0x04
5 - 0000 0100 0x04
6 - 0000 0100 0x04
under 0000 0000 0x00
You would use the custom characters by sending a display dump message using the custom character
numbers in the places where you want the custom characters to appear on the display.
Note that the dump always contains all 8 custom characters for a total of 64 data bytes.
Setup Dumps (Type 0x0128 in V1.00; 0x0129 in V1.10)
The system supports 5 stored setups and an active setup. The system is immediately reconfigured for new
active setups once they are received.
The setup data structure is defined as follows (dump bytes are in this order):
Byte #
1,2
3-6
7,8
9,10
11,12
13-16
17,18
19,20
21,22
23,24
25,26
27,28
29,30
31,32
33,34
35,36
37,38
39,40
41,42
43,44
45,46
47,48
49,50
51,52
53,54
55,56
57,58
59,60
61,62
63,64
65,66
67,68
69-86
87,88
42
Description
# Bytes
MIDI Receive Channel
MIDI Transmit Speed
MIDI SysEx Receive
MIDI SysEx On/Off
MIDI Transmit
Pgm# Offset
MIDI Automation
MIDI Clock Send On/Off
Program Sort Mode
Modes Contrast
Automation Xmit ID
MIDI Pgm Change On/Off
MIDI Ctl Smooth
Modes Bypass
Modes MemProtect On/Off
Store Prompt On/Off
patch_update_mode
Modes Sleep
Modes Mix
Modes Pgm Load
Pgm+
Pgm-
Audio Input/clck
Audio Output
Audio Dig In Lvl
Audio ChanStatus
Audio Soft Sat
pedal_max
pedal_delta
Modes Tempo
Audio Input Mode
Modes Pgm Load
setup_name
Global Bypass Level
Parameter Type
V1.00
1
0x00F1
2
0x00F2
1
0x00F3
1
0x0126
1
0x00F4
2
0x00F5
1
0x00F6
1
0x00F7
1
0x00F9
1
0x00FA
1
0x00FB
1
0x00FC
1
0x0117
1
0x00FE
1
0x00FF
1
0x0118
1
not used
1
0x0101
1
0x0102
1
0x00FD
1
0x0104
1
0x0105
1
0x0106
1
0x0107
1
0x0108
1
0x0109
1
0x010A
1
-
1
-
1
0x0119
1
0x011A
1
0x0100
9
1
Lexicon
V1.10
0x0127
0x0118
0x0119
0x011A
0x011B
0x010B
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