On Thu, Oct 16, 2008 at 9:12 PM, Gerhard Fiedler wrote: > > Huh? WinXP 32bit is restricted to 4GB RAM, and some of that address space > is taken over by hardware mapped into the address space, so you end up with > less usable RAM than that. But so is any other 32bit system, including Mac > and Linux. WinXP has a default of 2GB of process space, which you can > increase to 3GB. Much more RAM is hardly available on any 32bit system. > That's the per process limitation http://support.microsoft.com/kb/555223 Supporting more ram is a differentiation that MS can charge more $ for :( linux lets you do it for free of course http://www.spack.org/wiki/LinuxRamLimits These days it usually makes more sense to run a 64bit OS though Vista 32 supports a max of 4GB which seems like a bit of a dead end. Many drivers don't work with 64bit or PAE though John -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist