Event bits in ASM and World Map Load events

I think your code is almost ok. I remember using a JMP instruction somewhere, then wrote some code to finish it with a RTS and the game was freezing. This was due to altering the PB register. I had to have a PLB or PHB instruction before my RTS to fix this. If you strictly uses JSR, JSL, RTS or RTL this shouldn't happen though.

Also, you should do LDA $1EC1 to load the event bit. I'm not sure LDA $7E1EC1 is the same... Maybe but maybe not. I'm no ASM master.