RS232 communicate season traffic


Hi all,

I googled and googled and googled.
I really like to know how to to send ATR and APDU commands to my season card to be able to see what the cam replies.

I still own a season and Wallbanger 352 sort off still works (at least I can see some traffic)

So on linux
picocom -s 115200 -d 8 -p n /dev/ttyS0
this just gives me crap so with other words I can't even view.

I know there are old Emus out there but I'd like to write my own very very basic emu/logger.

Could please someone point me in the right direction here to understand the basics ?
Thank you very much