I wanted to know if anyone has any experience with editing/modifying the walk/run/jump/timing patterns for Mario in the demo mode for SMB1. I'm not referring to modifying the game physics, just how long mario walks, when he jumps and runs, etc while in the demo mode waiting for the player to press start.
I have seen several hacks where this appears to be modified to correspond to new level designs but I cannot find any info on how to do this or how involved it is. Is there some sort of memory map that defines the actions/timing of mario in the attract/demo mode which could theoretically be altered with a hex editor? Any advice would be appreciated. Thanks!