Call me stupid.

I'm trying to use /dev/dty00. I can read characters from a remote
device, but every time I try to write characters, I get:

cat tree.tcl > /dev/dty00
cat: stdout: Input/output error

whether or not I have somthing connected to dty00.

What am I missing? I though the dty* devices were supposed to act
like a local connection? Is it documented any where?

-Rich
-- 
Richard Pennington		Introl Corporation, Milwaukee, WI USA
Email: rich@introl.com		Phone: +1 414-273-6100	Fax: +1 414-273-6106
				US and Canada: 1 800-327-7171
Cross development tools for the 68HC05, 68HC08, 6809, 68HC11, 68HC12, 68HC16,
and 68XXX:			http://www.introl.com	ftp://ftp.introl.com