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Serial port programming

I have a LCD character display connected to a uslsa(4) USB-to-serial bridge.  
It is programmed using escape sequences that are sent at 9600 bps, no parity, 8 
databits, 1 stop bit (9600 8N1).  I am trying to send escape sequences using 
the attached small C program, but it does not work.  Is anything worng with 
that program? (I am at the same looking at the kernel driver, btw).

It does not work neither on NetBSD 5, -current, nor on FreeBSD nor on Linux. 

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