Hello,


> >I need to use the Mac (OS 9) printer port or the modem port as a 
> >RS-232 serial line in Squeak.  I have a Keyspan and I can see the 
> >port fine in AppleScript. I have been unable thus far to determine 
> >how to open SerialPort to get things to work.

If you want to open a serial port, do something like :
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
	port _ SerialPort new.

	port baudRate: 2400.
	port dataBits: 8.
	port parityType: 1.
	port stopBitsType: 1.
	port openPort: 0.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

The main point is you have to set the port *before* to open it.

Hoping it could help you...
Regards,
Alexandre