Composite Video - Olinuxino Max

[nejemia]

Dear All:
I have a couple of new questions for you.
1) How do I send the results of program (just a Text file) to the Composite RCA Video Output ?
I want to display certain announcements on my TV monitor using big fonts -
2) The RS-232 port available at the UEXT connector, which device is under /dev ?
Thanks a lot.
Nelson --