> I think it might be a good idea to write a generic call-in, call-out layer
> (maybe merge it into the tty system?) so that every serial port device
> could have this feature with little or no modifications.  Admittedly, it
> would be a lot harder than just modifying the zs driver, but it would be
> a lot cooler :-)

My friends made such routines. I've heard it works under NetBSD/sparc,
NetBSD/sun3, NetBSD/i386. But they don't subscribe tech-kern mailing-list.

Koji, how about status of the driver ?
--
soda@sra.co.jp		Software Research Associates, Inc., Japan
(Noriyuki Soda)		   software tools and technology group