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Much of the impetus behind my studying of “viciv.vhdl” came from an issue I observed while using 640x400 4-bitplanes (16 colour) mode.

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I’ll provide graphviz/dot diagrams for the two state machines below. My hope is that they will be of good use to newcomers to this file that want an overview of the behaviour (rather than trying to have a read through the over 5000 lines of source code within the “viciv.vhdl” file). Once you get your bearings via a nice overview diagram like this, I hope you’ll be able to navigate to the areas you are interested in easier and hone your focus on the specific areas you want to investigate deeper into.

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