<?xml version="1.0" encoding="utf-8"?><!DOCTYPE article  PUBLIC '-//OASIS//DTD DocBook XML V4.4//EN'  'http://www.docbook.org/xml/4.4/docbookx.dtd'><article><articleinfo><title>NotesAboutUsingDMDXOnXPMachinesAtTheUnit</title><revhistory><revision><revnumber>2</revnumber><date>2013-08-02 16:17:05</date><authorinitials>RussellThompson</authorinitials></revision></revhistory></articleinfo><section><title>DMDX on XP machines</title><para>When using <ulink url="https://imaging.mrc-cbu.cam.ac.uk/language/NotesAboutUsingDMDXOnXPMachinesAtTheUnit/language/DMDX#">DMDX</ulink> on a XP machine, with one of our Keithley cards you ALWAYS have to use QPIO instead of PIO in the script header. </para><para>Also, it is now recommended to use explicit refresh rates in your video modes, so use </para><screen><![CDATA[   <vm 1024, 768, 768, 16, 100>]]></screen><para>Instead of the usual </para><screen><![CDATA[   <vm 1024, 768, 768, 16, 0>]]></screen><para>The first will get you 100 Hz refresh rate for sure, while the second will get you the 'default' refresh rate, which could be anything, really. </para><para><ulink url="mailto:maarten.van-casteren@mrc-cbu.cam.ac.uk">MaartenVanCasteren</ulink> </para></section></article>