awesome-gbdev VS dmg-acid2

Use https://gbdev.io/pandocs/ , https://gbdev.io/gb-opcodes/optables/ and https://github.com/gbdev/awesome-gbdev to get started.

It's possible. There are various options for Game Boy development kits. The Awesome Game Boy Development list would be my starting point, I think.

This is the github community to start https://github.com/gbdev/awesome-gbdev I would recommend you start first with gbsutdio, you can achive something like that that with the new update and is easy to use.

Counterpoint here: I recently used awesome-gbdev[0] and found it fantastic. Not starred or bookmarked though!

[0] https://github.com/gbdev/awesome-gbdev

But sticking with GB: Have you seen awesome-gbdev? There's some great stuff in there.

I suggest looking here: https://gbdev.io/

My Game Boy emulator has almost passed dmg-acid2, except that it has the "Eye displayed instead of right chin" failure mode. The README says that this signals an issue with the "window internal line counter," but I don't see where that's documented. Can someone enlighten me?

I tested it with the classic dmg-acid2 test rom and another rom called sprite_priority.gb which is part of the Mooneye Test Suite.

For everything beyond opcodes, and especially graphics, the pandocs go over almost everything you need. For testing graphics, you can use the dmg-acid2 test roms which have tests for most of the common graphics errors.

Adequate PPU emulation (passes dmg-acid2 test). This emulator uses Pixel FIFO, as opposed to common scanline renderer.

acid-dmg, this is a really nice PPU test, you can try to complete it step by step.