To all you electronics people: ;) I'm presently designing a Z80 micro-computer system. But there are a few things I don't really understand yet. ;) Mainly the ports. Like, if I do 'out (7),a', where does that go, and how does it get there??? Is it somehow attatched to the address bus? And then it reads the byte on the data bus? How??? Help me! :) TIA, -- ~Keith TSK3000@Prodigy.Net