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MIDIbox VGM Player
Hardware Features
Supports one to four
MBHP_Genesis modules, allowing the user to play that number of VGM files simultaneously (one on each board)
OPN2: supports YM2612 and YM3438
PSG: supports SN76489 and SN76496 directly, SN76494 with external clock generator
Simple front panel interface
Entire synth can be powered from USB
VGM Playback Engine Features
Stream VGM data from SD card; supports Sega Genesis / Mega Drive, Sega Master System, Sega Game Gear, and any other VGM file that includes a YM2612 or SN76489
Advanced multithreaded system for optimal performance
Corrects OPN2 frequency commands in real time (hardware OPN2 clocked at 8
MHz rather than 7.67
MHz)
Corrects PSG noise zero frequency issue to match Sega Genesis embedded PSG behavior
Supports block and embedded samples
Seamless VGM looping
Simple
API–project is contained in one short app.c file
Construction
You need:
STM32F4 core with SD card
2×20 or larger character LCD
Small custom front panel board with 1 encoder and 6 buttons (see below)
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Front panel board
The front panel board has a single 74HC165 DIN shift register, with the following connections:
The four softkeys each correspond to five characters on the LCD display's bottom row.
Software
An official build is available now on SVN! Report bugs to me on the forums.