Port Juggler lets you share a printer or other serial device with four Macs. Or lets you connect 4 serial devices, printer, modem, midi, etc. to a single Macintosh. No manual switching. Once the port is assigned, it will automatically switch to the correct device.
Original package includes the Port Juggler, serial cable, user’s guide and software disk. Requires a Plus or newer and System 6 and up.