NorthGuy
Well-Known Member
1) It doesn't. It has a program address bus. And it puts the current execution address on the program address bus. Then it reads the command code from the program data bus. It doesn't know how the code gets there. It could be a ROM module that puts it there, a RAM module, or anything else which the engineer deemed necessary.
2) same as 1, except it uses data bus (or some have a single bus).
3) see 1.
2) same as 1, except it uses data bus (or some have a single bus).
3) see 1.