Not entirely sure how to describe the behavior. I plugged AM 1.5.3 onto a windows laptop that I've gutted down to a bare mobo. The emulators run great, full speed. But AM itself is painfully slow. I initially thought it was just being slow, but when I changed layout to AttractMan it looks like AM is processing full speed, but only updating the screen every 1/3 second or so. The pacman jumps about 5-6 dots forward in regular chunks regardless of windowed or full screen mode. Nothing else is running except bare windows services.
It is a direct copy/paste of the install from my test machine where it works just fine.
Any ideas?