Ultrastor Ultra-12 controller. It's got 64Mb. This one is going to

That's the problem.  You're exceeding the kernel's virtual address space
most likely.  You could try setting a BUFPAGES limit manually that's a
bit lower than the default.

   ed1 works fine, though. The possible trouble here is, that com1 is
   configured at irq3, just like ed0. Although both devices are recognized,

Yes, this is going to screw you.  I have code which fixes it, but it's
not ready to be released at the moment.


Also, whether or not you change BUFPAGES, you'll probably want to increase
the NKPDE constant in /sys/i386/include/pmap.h.  Try 15, and your problem
should go away.


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