Demo compatibility

[RiedleroD]

I've tested a few demos, and these are the results:

Works perfectly (as far as I can tell)

• CUTE DEMO
• 10 PRINT
• matrix-rain-gb
• back to color
• beach-gbc
• GBVideoPlayer
• BGVideoPlayer 2 (some flickering here and there, but that might be normal)
• Is that a demo in your pocket?

has Issues

gbc and gba seem to have the same bugs, and the bugs that happened with dmg and sgb seem to happen to all emulation modes, so I marked every bug that happens on gbc and gba as (gbc) and didn't mark the rest.

• Roboto Demo The 3D-ish thing doesn't look right and flickers slightly. Here's how it's supposed to look: https://youtu.be/WmMDLpUQ0oU
• 20y incorrect intro because of custom gbc bios a slight visual glitch in this part (gbc)
• Oh! a similar visual glitch in this part (gbc) at 2:31 as well (gbc) some slight tearing at 2:36 more tearing at 3:12 (gbc)
• gejmboj the same visual glitch at 4:51 (gbc)
• It came from planet zilog doesn't start at all on dmg, which is probably intended but should be investigated regardless coloring glitch on the top at 4:42, possibly caused by incorrect wrap-around

Some of these demos were never meant for the gbc and gba, and some only work on those, so someone should probably test the behaviour on real hardware. I do have a gba sp, although I don't have one of those custom cartridges with an SD-card-slot. I'll update the issue with more demos later today, but I think it probably won't uncover any new bugs.

[RiedleroD]

update: I'm gonna get a SD-card cartridge loader on May 13th, so I'll be able to test those (and more) on real hardware to compare to the emulator.