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Re:Goboy: Multi-Platform Nintendo Game Boy Color Emulator Wr... by akdas on Friday November 23, 2018 @01:43AM (#18514802)
Timings are usually documented as well, usually at the clock cycle level.

Beyond that, you have to worry about hardware peculiarities that happen to affect maybe a few games, and at that point, you might start reverse engineering the behavior of those games!

Take a look at this article talking about exactly those thinking issues: https://www.tested.com/tech/gaming/2712-why-perfect-hardware...

Re:Goboy: Multi-Platform Nintendo Game Boy Color Emulator Wr... by Narishma on Friday November 23, 2018 @07:49AM (#18516084)
Re:Goboy: Multi-Platform Nintendo Game Boy Color Emulator Wr... by akdas on Friday November 23, 2018 @04:34PM (#18519029)
Oops! I searched for the article, then picked one of the results. I didn't realize the one I linked wasn't the original because I only looked through it enough to make sure the right content was present.

Thanks for the correction!