SLIP with AIX PS/2

[Udo Schillingmann University of Osnabrueck, West Germany]

I would like to connect a PS/2 with AIX to our IP network with a serial line.
But isn't possible to configure a tty as an IP device with 'ifconfig' because
the driver 'sa' doesn't allow such configuration. I know, in AIX/RT on the
IBM 6150 you can make it without any problems.
Does anyone know a solution for my problem or an special driver for the tty
device to make SLIP with AIX PS/2 ?
U.S.