Hi.
I been trying to get Ultima 7 working on my 486 and I could not get past the red loading screen (The black gate) or blue loading screen (serpent isle)
Most of the time it just hang there , I think, after it loaded everything.

But sometime it crash to dos with the following message: Sorry, an error has occurred. Please write down the following information: Error 0x6601 at 7F1A:0273.

* tested with different cut-down config as game have EMS allergy:

himem.sys only
mmouse.com only
mvsound.sys only (sound driver)
xhdd.sys then smartdrv then none (disk caching)
ansi.sys and no ansi.sys
4DOS and command.com
fast40.com only (Ali M1429 fixer, needed to run Cyrix 5x86 CPU with FSB40 on my Acer system, AT bus default speed is wrong and without it, it "beep" half of the time I press a key on the keyboard)
5x86.exe and no 5x86.exe (Peter Moss tool to enable CPU experimental features)

I also did reinstall the games, checked if it had read only files.