Based on the original VPinMAME, their license and rules apply. Modifications for SPA done by DJRobX.
Based on the ideas presented in my proof-of-concept prototype.
This is my private fork for additional changes and improvements.
The interesting code can be found in src/wpc/sternpba.c
If you like my work, a donation would be nice:
Even a small amount does help me and shows appreciation. Thank you!