mooneye-gb VS giibiiadvance

The Mooneye GB project, still only doing DMG and not supporting Color, is trying to accurately document as many variants and differences between versions as possible. But it's essentially at the cycle level and not gate level. If there are very nuanced differences at the cycle level, there are probably a lot more differences on the gate level.

Test your DAA instruction. https://github.com/Gekkio/mooneye-gb/blob/master/tests/acceptance/instr/daa.s

[3] https://github.com/Gekkio/mooneye-gb/tree/master/tests

Does anyone know of good documentation beyond: - Pan Docs - The Cycle-Accurate Game Boy Docs - Complete Technical Reference - Nitty Gritty Gameboy Cycle Timing

For actual documentation, you probably know the pandocs, but there are a lot of more specific information in the docs linked in their references, especially the cycle-accurate GB docs, the GB complete technical reference by Gekkio. You can also check the source code of the relevant test roms, like the Blargg’s test roms for more general behaviour and the MooneyeGB test suite for more specific things.

The Cycle-Accurate GB Docs: https://github.com/AntonioND/giibiiadvance/blob/master/docs/TCAGBD.pdf