TODO.txt

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	CPU

- Add register&flag usage prediction for removing some push-pull
- Fix original interrupt flag for PHP and PLP
- Optimize forward branch by removing some branch-jump combo
- Prevent writing useless JMP, not the ones related to branch-jump combo
- Optimize branch detection when disassembling
- Allow NMI to happen during NMI execution
- Fix stack tracing for cross-bank JMP and indirect JMP
- Fix memory emulation for STA (ZP,X) when writing to ROM
- Stack wrap
- Implement illegal 6502 opcodes

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	IO ports

- Add ports $2003 and $2004
- Optimize $2007
- Emulate $4016 and $4017 instead of using the SNES ports directly (for Duck Hunt, custom controls and GUI menus maybe)

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	PPU

- Add color emphasis
- Fix disabling background, seems to not work when left column is disabled
- Randomize VRAM allocation for CHR when 2 or more CHR buffers are found to have the same amount of different bytes
- Fix 8 sprites per scanline sometimes showing 9 for 8x8 and 8x16 sprite size.
- Palette option
- Redo VRAM map to allow sprite pattern table swap
- Mid-frame palette changes

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	APU

- Remove delayed silencing through $4015
- Add DMC channel
- Add APU IRQ
- Fix noise channel volume

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	GUI

- Replace BG3's font
- Add warnings

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	EXE

- AOT optimizations
- Better bank allocation