It probally general protection fault interaction between the vesa 3.0 video driver and the memory mapped regions that video card wants to access. Have EMM386 exclude the memory area a000-ffffh.

--chris
http://nxdos.sourceforge.net/

John Hupp wrote:

Hello, all. Here is another issue arising from my check-out of the new Service Release 2. I find that loading EMM386.EXE can cause Ctrl-Alt-Del to fail. I boot fine, then press Ctrl-Alt-Del from the DOS prompt. The screen goes black, but the video and system BIOS boot messages never reappear. Very occasionally the keyboard is locked altogether and does not execute Ctrl-Alt-Del.





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