Linux program and serial port (5.2.1)

[Carlos A. Carnero Delgado]

Hi,

I have a little program , linux native, that I've managed to run
thanks to the Linux compat layer. However, this program opens the
serial port ttyS1, which doesn't exist as such in 5.2.1.

The question is this: how do I make this program to open the serial
port? (FYI, the device it should open is a random number generator.)

Thanks,
Carlos.