Summary

With this patch users can use a host connected OPL2Board via a Arduino generating a serial port and the notes will be redirected to the original OPL2 chip.

Checklist

• Closes #xxx
• [ X] I have discussed this with core contributors already
• This pull request requires changes to the ROM set
  • I have opened a roms pull request - https://github.com/86Box/roms/pull/changeme/

References

Required a external hardware
1.A OPL2Board https://www.tindie.com/products/cheerful/opl2-audio-board/
2.a Arduino Nano
3.Load the following Sketch to Arduino Nano https://github.com/josephillips85/ArduinoOPL2/blob/master/examples/OPL2AudioBoard/SerialPassthrough/SerialPassthrough.ino
4.Connect the Arduino Nano with the following Diagram.

Arduino Pin 8 - Reset
Arduino Pin 9 - A0
Arduino Pin 10 - Latch
Arduino Pin 11 - Data
Arduino Pin 13 - Shift