Yeah I must be looking right through it..I just put a Radeon 8500 into my primary MAME PC (unbuilt cab), and I'm putting a Radeon 7500 into my mini-mame cab (also, unbuilt, but due to begin prototyping this week!)......on the 8500 I'm not seeing a monitor rotation option anywhere.
Does the DVI port have to be engaged for that option to appear!!??!?!?!?!