This is on Al-Jalima, my Pentium Pro machine. I've swapped from the Voodoo Banshee to a Matrox Millennium II and Voodoo2 combo, and I've started messing around with ways to improve my video performance under DOS/Win9x. FastVid completely breaks compatibility with EGA/CGA stuff no matter what I do, and MTRRLFBE does the same but in a different way that makes me think I might be able to fix it. I was wondering if that's just intrinsic to enabling Write Combining or if it's something I'm doing wrong? The solution can't just be to stop running my EGA/CGA stuff on there, this is my one DOS-capable machine (ISA sound) and probably will be for quite a while.