i did test 800x480 vs 640x480 when testing existing mouse patches but not since.

i tend to run windowed as it is easier to quit. some titles make you start a new game before giving the option to quit to dos. the usable screen is therefore positioned to bottom left of the screen. as a result my offset seems to cause cursor to display to the right and up from where you actually click.

i'm thinking the working games must initialize the mouse to the centre of the screen when launching. still need to look into dummy event or warpmouse calls