This small synth is a demo of the MBHP_Genesis module (available now from the MIDIbox Shop!).
The front panel board has a single 74HC165 DIN shift register, with the following connections:
The other sides of each of the buttons, as well as the encoder's common pin, are grounded.
The four softkeys each correspond to five characters on the LCD display's bottom row.
An official build is available now on SVN! Report bugs to me on the forums.
Connect an SD card with several VGM files in the root directory before powering on the synth. It is recommended to rename them to file names 8 characters or less, or else the names will use MS-DOS syntax on the screen and be hard to read.
Select the MBHP_Genesis board to play the VGM file on with the softkeys. Select the file with the encoder. Press Enter to play the VGM file or to stop the current one and start the selected one. Press Menu/Back to stop playing the current VGM file.