In Session 7 of "Atari 2600 Programing for Newbies" I learned that 50Hz PAL has up to 242 lines of actual picture.
However, the Stella Programmer's Guide says to use 228 picture lines when doing a conversion from NTSC to PAL (see screenshot below).
Which one would make most sense to use? I guess when converting an NTSC game to PAL50, it would be even easier to use 192 visible scanlines (just like NTSC) and increase the number of lines in VBLANK and OVERSCAN accordingly. Or would that cause issues? (other than not using the full screen estate).
Are there any best practices to follow when creating a game that should run on NTSC, PAL60 and PAL50?