Just thought I'd add that under both DOSBox 0.72 and the latest ykhwong build, Gene Wars - while working just fine after you use the unofficial patch and adjust config.ini accordingly - has some trouble getting back to the DOS prompt after quitting.

It just stays on a black screen forever, and eventually the status output window will flood itself with millions of "Illegal read" errors or somesuch.

I think it could be a DOS4GW problem somehow???