<a href="ftp://ftp.eunet.bg/pub/simtelnet/msdos/graphics/univbe51.zip"
univbe51.zip VESA (Video Bios Emulator?) for most SVGA cards.</a> <a href="ftp://ftp.eunet.bg/pub/simtelnet/msdos/graphics/vesa_tsr.zip" vesa_tsr.zip SuperVGA TSRs</a>
Those links might be of use, especially under DOS and FAT32. But considering the dates on those files, I recommend knowing the maker and model of your video card and looking around the manufacturer's site for TSRs or .SYS drivers, or perhaps a configuration utility that enables a hardware VESA bios to be visible. The search might be like this: "VESA DOS [maker] [model]", but hopefully search engines don't hav a better organization of what you want to know than your manufacturer. http://www.drivers.com/ might also be of use in the event of a defunct or foreign manufacturer or in the unlikely event of a maker with little presence on the web. (Who knows, maybe Windows is hiding your VESA bios [instead of emulating it], or you just haven't waited long enough for the screen to resynchronize, which seems to take pretty long, sometimes.)