Odd behavior with JJ and 3D World Runner.

[Brianvgplayer]

Hi. I noticed some strange behavior when starting JJ right after 3D World Runner (both FDS and NES versions). The game goes straight to the attract screen and skips the first title screen, the HUD is more like 3D World Runner, but has the wrong colors, and the player sprite is the one from 3D World Runner. The game also shows red and blue when switching to 3D. Loading up other games can sometimes cause corruption for JJ, as well, though loading up games before starting it again can also make it load up normally.

[Thelypody]

This sounds a lot like an issue I opened previously: #341. As it is described by the dev there, currently the NES core does not clear RAM when switching roms. It doesn't affect anything in 99% of cases, but sometimes it can lead to weird behaviors. I assume that 3D World Runner and JJ use RAM in very similar fashion, so games think that they are running after console reset instead of cold boot when you load roms and don't initialize RAM properly, using existing data from previous game.

#341 has a link to a test version of the core which has some new advanced options, you can try it and check if issues can be alleviated with them.