Howto send raw HDLC frames on /dev/scc0?

Hi - I used the /dev/scc devices in earlier kernels but am now using
2.6.9 and things have changed a lot.

The scc driver module is built, installed, loads and I can talk to it
using the sccstat program - but I don't know what the API is to send
and receive raw HDLC frames!

I open the device by using the socket() call:

int fd = socket(AF_AX25,SOCK_DGRAM,0);

This succeeds (gives fd > 0).

A write() of two bytes (eg. a SNRM to address 0x55) fails with:

Cannot assign requested address

from perror().

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Does anyone have an example source file that simply opens the
/dev/scc0 device and sends and receives a frame???
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I am missing some infomation and just need a kick in the right
direction.

Cheers,

Nick.