I found this page talking about various bugfixes for killscreens in the likes of Donkey Kong, Pac-Man and more:
https://www.classicarcadegaming.com/forums/index.php?topic=1318.0They all seem to have been fixed by Don Hodges way back in 2008, but I can't find most of them now.
dkongp - Donkey Kong with a patch to fix level 22, by Don Hodges
galagap - Galaga with a patch to fix level 256, by Don Hodges
mspacmap - MsPacman with patches to fix levels 134-256, by Don Hodges
pacmanp - Pacman with a patch to fix level 256, by Don HodgesThere's already a
dkongp in FBNeo, which I'm
guessing is the fixed Donkey Kong. I've also found a ROM called
pacm255 in HBMAME, which seems to be the "Puck Man" version of the fixed Pac-Man.
I've managed to get those three working via jiggery-pokery in lr-mame2003 (though it'll be quite a while before I can establish whether they do indeed work past the killscreens

), but it'd be really cool to have fixed versions of all four/five games running under their proper names. (I wonder if anyone ever fixed the Japanese version of Donkey Kong with the different level order.)