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HI, I came across a little program called irqtune which changes the priority of interupts in ibm pc's. The idea is to give highest priority to serial ports which are essentially real time devices and lower priority to hard disks etc - which usually can afford to wait. I am using it on my system with no apparant harm, has anyone else tried it and does it really work? Andrew ========================================================================== Andrew Martin| andrew@star.apana.org.au | http://star.apana.org.au ------------------------------------------------------------------------- Looking beyond the embers of the bridges glowing bright behind us To a glimpse of how green it was on the other side. [Gilmour/Samson] ==========================================================================