Byte by byte? Where does that come into it? I don't think there's much Production work on a Commodore 64 these days. You don't have to "worry" about anything. I

Byte by byte? Where does that come into it? I don't think there's much Production work on a Commodore 64 these days. You don't have to "worry" about anything. I/O is asynchronous, but your High-level Language doesn't know about that, it will appear synchronous. Meanwhile tons of other stuff is going on, and I can't really think of any of it that would be "byte by byte".