I rebuilt my machine with a different motherboard last year, and have managed to get Windows 98SE running on it pretty well.
I've ended up using two graphics cards, with an old ATI X850 card for Windows 98 compatibility, and a current nVidia card as well mainly for use on Windows 8.1. The latter is in an x16 PCIe slot, the former in an x4 PCIe slot.
The problem is that the ATI graphics driver on Windows 98 seems to crash or something when I do any intensive things like moving large numbers of files with Windows Explorer.
The monitor will suddenly black out with an "out of range" indication, and the only way I've found out of that other than forcibly rebooting is to use the "sleep" button on the keyboard. This has the effect of resetting the driver, but it comes back as shown in the picture, with a strange looking mouse cursor and a square of shash up in the top left hand corner.
I can use it quite happily like that, and it never crashes again until after the next reboot.
GraphicsDriverCrash.jpg 50.48KB 1 downloads
The only way I've found to stop it crashing at all is to put the hardware acceleration slider down two notches (one is not enough) but this results in not being able to use large fonts and/or having poor colour depth.
The strange thing is that the old motherboard had an AGP slot, and I was using there the AGP version of the X850 card, with exactly the same driver (Catalyst 6.2, the last version that works on Windows 98) and it was perfectly stable.
The card I have now is simply the PCIe version of the same card, with the same driver, and it crashes!
Anyone any idea how to troubleshoot this, as it's very annoying!
Edited by Dave-H, 16 February 2015 - 06:33 PM.