initial mapper 30 support, tools and fixes for non-Windows builds #7
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Mapper 30 looks wrong. According to nesdev wiki, you get single screen mirroring with nametable selection when the 4 Screen flag is set, and the Vertical Mirroring flag is cleared. (Which is a bad design choice, as that is how you normally specify 4 screen mirroring!) edit: Also the stack is imbalanced in that code and it will crash. |
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Based on FluBBaOfWard/NesDS#1