This is great news! Your mapping is 1-to-1. I messed up button #5’s mapping and set it to #3 also. You had two things mapped to button #5 in your request. Swap and R/S. How do you want it again?

P1B1: (SELECT/FIRE)
P1B2: (SPACE)
P1B3: Save Snapshot
P1B4: Warp Mode
P1B5: (Joystick Swap or RUN/STOP)? How about Swap here
P1B6: Load Snapshot
P1B7: (How about RUN/STOP)?
P1B8: (How about PAUSE or MENU)?
P1B9: (Quit) (Or do you just want MENU then let the use select QUIT in case of accidental push?)