Hello, Have you considered getting a MiniDock for your Duo? That would give you: ADB 2 serial ports SCSI connector (HDI-30) Floppy port (HDI-20) Sound in and out video I know this isn´t what you asked for, but... Patrick Selliers Helen Ross wrote: > hi, > I'm sure I read somewhere that it is possible to add a second serial port to a duo in place of where the modem fits. (duo 230) > > Can anyone point me to instruction, information? > > thanks, Helen >