Jonathan wrote:
Try updating the video drivers for XP.
I guess I didn't make it clear. I booted the machine to Freedos, an open source DOS clone, and got the exact same behavior. Therefore Win XP has nothing to do with it. Since it works OK in some video modes, but not others, there must be some video logic that is messing me up. Only SVGA has the problem. And as I said, the image is generated OK, so it is something in the logic that cleans up after the image is produced. I'll try to narrow down exactly where it hangs.
Bios settings should have no effect.
I wonder if there's an interrupt that is not set right. Most are set to auto. I realize you can't debug this at a distance. I'll see what I can come up with. BTW, Freedos can be set up to boot from a CD. This is a very promising way of extending the life of the DOS version. All that's necessary is to have a FAT partition to save images. Tim