> After executing the nop instruction the PC will be advanced by 1, because that's the size of nop and advancing it by 1 causes it to point to the next instruct

> After executing the nop instruction the PC will be advanced by 1, because that's the size of nop and advancing it by 1 causes it to point to the next instruction Nit: the IP will be advanced by 1 before the nop is executed. IP always points to the instruction following the one which is currently being executed. Which is important for IP-relative addressing and, as mentioned later, calls.