XT V20 @ 8MHz / OPL3 Tunes

The NECV20 CPU @ 8MHz is just on the edge of powerful enough to pull this off. In a 4.77MHz board it struggled with the more complex tunes. There are some tunes that even this XT can't handle, but not many. Full detail of this PC can be found at http://fastmhz.com/vintage-turboxt-project-1985-dream-machine/