I am having a hard time understanding how memory locations and how registers work,, is their a book or courses that anyone can suggest , no one teaches this any more, I took a digital course at the local collage ,they just touched on this part not enough to really understand and they did not go over memory

I want to be able to use my fluke 9010 to trouble shoot these arcade boards,, but when it gives loop info how to trace this back to a chip ,, any help would be great ,

how did all of you learn this ?????