> 
> The error is "Stray Interrupt: vector 0x18, ipl 31" and prevents bootup of 
> NetBSD. The "autostart" prompt appears, but when attempting to install 
> NetBSD ("boot sysinst"), the error repeats indefinitely.
> 
You got a machine check. This may be due to broken hardware (unlikely),
bad memory (unlikely) or that the boot program addresses outside 
existing memory/hardware (likely). Fetch the

ftp://bakfull.campus.luth.se/netbsd/boot.mop

file and mopboot it. To avoid the earlier problems with mopbooting ( :-)
just put it in /tftpboot and call it something like

lrwxr-xr-x  1 root  wheel      8 Oct 30  2000 08002b09aacc.SYS@ -> boot.mop

and then just boot it: (change xqa0 to something more suitable)

>>>b xqa0
(BOOT/R5:0 XQA0)



  2..
-XQA0
  1..0..


>> NetBSD/vax boot [1.9 Wed Nov  1 15:19:45 CET 2000] <<
>> Press any key to abort autoboot 5
Press '?' for help

This boot program at least boots my 4000/300 :-)

-- Ragge