I can't seem to find any guides anywhere for this;

I'm looking to make a basic computer, nothing special.
I can't find anything on electronics for this game much further than basic logic gates
I could figure out how to make more basic stuff like RAM,

but I need more help on something like arithmetic logic

I have experience with computers, hardware, and low level programming with assembly or machine code,

I do not have experience with this game;

I'm just looking for some sort of guide, or compilation of guides, to help with this project.
Thanks

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