Hello!

> Jan 25 22:31:27 sy-borg /netbsd: asc_get_status: cmdreg 11, fifo cnt 7
> Jan 25 22:31:27 sy-borg /netbsd: rz0: Illegal request

I had exactly the same problems. Have a look at pr 5510. I solved it by
compiling a 1.3.3 kernel with the old asc driver from 1.2G times. Since
I have done this, my DECstation 5000/200 runs rock solid without thos
messages and panics.

asc.c.1.2G:
     $NetBSD: asc.c,v 1.39 1997/06/16 03:46:29 jonathan Exp $

asc_ioasic.c.1.2G:
     $NetBSD: asc_ioasic.c,v 1.9 1997/06/22 07:44:04 jonathan Exp $

asc_tc.c.1.2G:
     $NetBSD: asc_tc.c,v 1.5 1997/06/22 07:44:05 jonathan Exp $

ascvar.h.1.2G:
     $NetBSD: ascvar.h,v 1.1 1996/09/25 21:07:56 jonathan Exp $

You have to remove the -Werrror switch, because there is one
warning, I did not bother to resolv that, but the resulting kernel
really works :)

Tell me if you have problems getting those files.

Greets
-- 
   Name  : Thorsten Frueauf            Milano@irc cri@onaliM       //
   E-Mail: s_frueau@ira.uka.de oder ukfy@rz.uni-karlsruhe.de     \X/