Resolution Switching

[Former user]

Bizhawk doesn't switch the resolution to 320x448 mode in games that use this mode, and I reported it for Bizhawk, but was told it was a switch in the Gen+GX core itself that doesn't allow it, and figured it would be better to report that here.

[Eke ekeeke]

That's not true, Wii port has no problem displaying the full interlaced screen, and so does the libretro port so it's definitively a frontend issue, not sure why Bizhawk devs would think otherwise.

By default, Genesis Plus GX indeed keeps generating a 320x224 screen buffer on each emulated "frame" in interlaced mode 2 because that's what original VDP does and some frontend might want to do the interlacing themselves or let host video hardware handle it if can generate interlaced video from single-field framebuffers (that's the case with the Wii for example).

However, if config.render is set to 1, the emulator will render a 320x448 screen buffer in interlaced mode 2 with every other lines rendered on each emulated "frame", giving the illusion of interlaced screen. Tell Bizhawk devs they should have a look at the libretro port to see how this is done.