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[nesppuspecs]: https://www.copetti.org/writings/consoles/nes/
[nesppudocs]: https://www.nesdev.org/wiki/PPU_programmer_reference
[nesppupinout]: https://www.nesdev.org/wiki/PPU_pinout
+[custompputimings]: https://docs.google.com/spreadsheets/d/1MU6K4c4PtMR_JXIpc3I0ZJdLZNnoFO7G2P3olCz6LSc/edit?usp=sharing
# Generating audio signals