Privileged instructions with Fusion

Hans-Jürgen Ude ude at
Mon Oct 18 10:47:47 CEST 2004

I've just started to try RTAI/Fusion. I've got it installed and running. The 
testsuite samples work too. Then I've just put an outb() function into one 
thread to watch the timing with an oscilloscope on LPT. As expected this 
doesn't work. Inline assebmly doesn't work either. It prompts "Killed" and 
terminates. So my question is how can I get this to work without using 
ioperm() or iopl(). Later on I'll need some direct memory access too. 
Otherwise i'd  have to write a complete PCI driver for proprietary hardware, 
but i've never done that before.


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