4 ms·
It has (pretty bad) RS232 routines in ROM, which bit-bang across some of its GPIOs (of which there are 10 or so on the User Port). Other than that, it has its
by white-flame 10y ago
It has (pretty bad) RS232 routines in ROM, which bit-bang across some of its GPIOs (of which there are 10 or so on the User Port).
Other than that, it has its serial peripheral bus, used mostly for printers & disk drives. There were also device sharing & custom networking hubs which sit on that bus.
The ROMs supported a notion of general byte streams and could do simple redirection. It had that stream support for tape, keyboard, screen, RS232, and "device on the serial bus" built-in. Obviously, newer 3rd party hardware can support Wifi/Ethernet in various forms, and software can drive IP over existing links (like SLIP over RS232 adapters).
Oh, it also had a few hardware serial shift lines intended for the serial peripheral bus, but those never got used for that purpose (until the C128) and mostly sit unused.