>I am looking for a device that can connect one RS232 port (TX and RX) 
>on an
> embedded processor to one of several devices with serial ports and 
> can be
> controlled by a couple of I/O  bits on the controller. Can this be 
> done?

Use multiple RS232 transceivers (either all in one IC or separate). 
Then use standard logic gates to route signals from processor pins to 
appropriate transceiver. You could use eg CD4052 (from memory) analog 
type multiplexer or a digital multiplexer . 2 pins for TXD/RXD and 2 
pins for multiplexer control will give you 4 channels.



        RM

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