Hello,
Thought some people here might find this interesting, so here's a tutorial I wrote a few years back (with help and vetting from the NesDev community) on how to read the NMOS circuit displays in Visual 6502. Visual 6502 is a JavaScript-based digital circuit simulation of the 6502 CPU, and more generally a framework for simulating old chips.
The tutorial uses examples from the APU (audio circuitry) and PPU (graphics processor) in the NES. This is probably a good thing, as those circuits are much less dense and so easier to read directly compared to the 6502 circuitry. (The 6502 is a full custom design, while the APU and PPU are mostly built with standard cell components.) The particular examples aren't hugely important, and the principles are exactly the same.
I'm primarily a coder who's dabbled a bit in hardware (or hardware simulated in software anyway), so the tutorial should (hopefully) be easy to read even for people without much electronics experience.
Cheers,
Ulfalizer
Thought some people here might find this interesting, so here's a tutorial I wrote a few years back (with help and vetting from the NesDev community) on how to read the NMOS circuit displays in Visual 6502. Visual 6502 is a JavaScript-based digital circuit simulation of the 6502 CPU, and more generally a framework for simulating old chips.
The tutorial uses examples from the APU (audio circuitry) and PPU (graphics processor) in the NES. This is probably a good thing, as those circuits are much less dense and so easier to read directly compared to the 6502 circuitry. (The 6502 is a full custom design, while the APU and PPU are mostly built with standard cell components.) The particular examples aren't hugely important, and the principles are exactly the same.
I'm primarily a coder who's dabbled a bit in hardware (or hardware simulated in software anyway), so the tutorial should (hopefully) be easy to read even for people without much electronics experience.
Cheers,
Ulfalizer