20h - 7DH Ascii codes
7Eh
7Fh
0h - FFh Katakana & misc characters
The full character set of the DigiTech display may be found in the Hitachi
Liquid Crystal Display Modules (1987) data book page 37.
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GFX-1 (TwinTube) Midi Implementation
Device type for the GFX-1
Device Type = 12 (0Ch)
DigiTech Procedures recognized by the GFX-1
Request Configuration (00h)
Request One Program (01h)
Request Ram Area (06h)1
Data Response (10h)