I had to dig through my library, because even among programming games I own there were many options, but the one I was thinking of was https://store.steampowere

I had to dig through my library, because even among programming games I own there were many options, but the one I was thinking of was https://store.steampowered.com/app/684270/Silicon_Zeroes/ https://store.steampowered.com/app/684270/Silicon_Zeroes/ Definitely on the "Basic" side of hardware programming, but it helped me personally fill in some gaps in my understanding.