FCEUX had an obscure bug in OLD-PPU code that was fixed a couple days ago:
https://github.com/TASVideos/fceux/comm ... b359388ac8
https://github.com/TASVideos/fceux/comm ... f33a5f84d7
disable-sprite-in-leftmost-8-pixels part of the oldppu was broken since Nov 7, 2018
Sprites at left side of screen in "Prince of Persia" was affected by this bug.
Zeromus told me:
This is strange, because i used 22.03.2019 build very long time and testedit broke EVERY game that scrolls
only most people use newppu so nobody noticed
many popular games (~150 titles) on old-PPU, but all of them was correct.
This is main reason why this bug was founded 1.5 years later.
So, what's wrong with Prince of Persia?
And what games potentially affected too?