Hello Michael,

> > > "Device not configured" would still be a somewhat stange error message...)
> > 
> > I agree, "Operation not supported" would make more sense.
> 
> Should I `send-pr'?

Theoretically, yes. But this one is in src/sys/arch/atari/dev/zs.c:

--- zs.c.orig	Thu Nov 16 13:31:39 1995
+++ zs.c	Tue Nov 28 10:41:42 1995
@@ -822,11 +822,11 @@
 		 # defaulting to software flow control.
 		 */
 		if(userbits & TIOCFLAG_SOFTCAR && userbits & TIOCFLAG_CLOCAL)
 			return(EINVAL);
 		if(userbits & TIOCFLAG_MDMBUF)	/* don't support this (yet?) */
-			return(ENXIO);
+			return(ENODEV);
 
 		s = splzs();
 		if((userbits & TIOCFLAG_SOFTCAR)) {
 			cs->cs_softcar = 1;	/* turn on softcar */
 			cs->cs_preg[15] &= ~ZSWR15_DCD_IE; /* turn off dcd */


Waldi