Apologies if this already been addressed somewhere, I did a thorough search and came up with nothing.

Here's my specs:

Motherboard: ASUS P5QL PRO 775 P43 RT
Processor: Intel Core2 Quad Q6600 2.4GHz
4 GB DDR2 800 MHz RAM
NVIDIA GeForce 8600 GT 512 MB RAM
Creative Sound Blaster Audigy 2 ZS
Windows Vista Ultimate SP 1

When I try running Space Quest 4 or 5 (didn't try 6) in fullscreen using DOSbox 0.72 the game starts slowing up badly. The sound and graphics all slow to a crawl.

This happens anytime I run the games in fullscreen. In a window they work fine. SQ1-3 all work fine in fullscreen.

I've tried messing around with fullresolution setting in the config but no dice. Not sure what else to try. Any help would be greatly appreciated.