Little bit of a confusing question. But Im really looking for learning some low level programming. Thing is, Dev boards like Arduino/Etc. really hide alot of whats going on.
The first few chapters of The Art of Assembly Language talk about how bits are stored physically using latches and goes into how these are used to assemble registers to hold bytes of data and how instructions such as left/right shift can be implemented in hardware. Probably not as in depth as you are looking for but it really opened my eyes when I read this stuff.