http://blogs.msdn.com/b/virtual_pc_guy/archive/2004/10/21/246136.aspxWell - I think it's time to go over how to tune DOS for running inside of Virtual PC. When it comes to DOS applications there is only one thing that counts - base memory. DOS starts with 640k of base memory - and every TSR* / Driver that you load usesen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/virtual_pc_guy/archive/2004/10/21/246136.aspx#10383705Thu, 10 Jan 2013 05:34:08 GMT91d46819-8472-40ad-a661-2c78acb4018c:10383705anonomous<p>who still uses dos?</p> <p>I still do :)</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10383705" width="1" height="1">http://blogs.msdn.com/b/virtual_pc_guy/archive/2004/10/21/246136.aspx#247315Mon, 25 Oct 2004 19:03:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:247315Zephan SchroederThe beauty of custom configuring UMA (Upper Memory Area or &quot;high memory&quot;) in a VM is the emulated hardware always has the same UMA regions free. With real hardware your free UMA regions would depend on your video card and other factors. That's why Ben can include some very specific UMA regions. <br> <br>Noting smaller replacement TSRs is a stroke of genius I had not considered. Excellent information. With this info someone can create an optimized config.sys with specific memory placements for each driver. Thanks! <br> <br>FYI: For a full length lucid description of MS-DOS memory regions try to find an old copy of &quot;Managing Memory with MS-DOS 6&quot; by Dan Gookin (Microsoft Press).<div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=247315" width="1" height="1">http://blogs.msdn.com/b/virtual_pc_guy/archive/2004/10/21/246136.aspx#246254Fri, 22 Oct 2004 12:58:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:246254Jeremy DavisIf only I had known all the nitty-gritty tweaks when I was actually running DOS!<div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=246254" width="1" height="1">http://blogs.msdn.com/b/virtual_pc_guy/archive/2004/10/21/246136.aspx#246220Fri, 22 Oct 2004 10:34:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:246220Andy DoyleAh the memories are flooding back :) <br> <br>Great blog BTW!<div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=246220" width="1" height="1">http://blogs.msdn.com/b/virtual_pc_guy/archive/2004/10/21/246136.aspx#246171Fri, 22 Oct 2004 07:41:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:246171William LuuI've almost forgotten about the DEVICEHIGH stuff, until your post! <br> <br>Oh boy, config.sys! <br> <br>And it only seemed like yesterday we were all just fiddling around with MS DOS 6.22 trying to get various games working... (Commander Keen! Lemmings, and a few others... Oh, Wolf3D!) <br> <br>Ah, memories ;)<div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=246171" width="1" height="1">