olddb wrote:
Did byuu released the chip schematics?
Did he ever actually produced one?
No, as far as I know he really only designed it from the software standpoint.
Ikari integrated it into the SD2SNES design, which is open source so you could use that to help you design your own dedicated MSU-1 board if you wanted. This hasn't been done by anyone yet AFAIK, so you'll have to do it yourself.