How to configure Linux to provide custom speeds.

I'm tracking how to do this.

First this:

http://linux.derkeiler.com/Mailing-Lists/Kernel/2006-01/msg03762.html

Someone here tried to set it up to 8192 bps ..

seems that no luck... yet

This guide is very good for a start on programming serial port on posix systems:
http://www.easysw.com/~mike/serial/serial.html