Experimental Physics and
Industrial Control System

"Mark Rivers" <[email protected]> · Wed, 30 Jul 2003 14:23:30 -0500

> > The problem with ioperm is that you can only open up the first 0x3ff
> > ports.  After than you need to use iopl.  
> 
> But the original posting was about the parallel port wasn't 
> it?  I was suggesting that ioperm would be a better choice for that
particular 
> application.

I am writing to the parallel port (typically 4 addresses starting at
0x378), but I also need to write to the "ECR" register to select the EPP
mode of the parallel port.  That register is at 0x378 + 0x402, so I
don't know if ioperm() will work.  I'll try it out.

Thanks,
Mark

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System