> First the reason I don't post this at the mame message board is that I can't
> register for quite some time...

You use the same login as this board..

> First question is what options should I choose to make the game run, visually,
> as identical to the real arcade as possible ?

Run the games at the native res/refresh on a real arcade monitor, anything else is entirely a matter of opinion.

> Second is how can I run mame at 3x4 aspect ratio(my screen pivots) without
> direct draw?

? It's usually much faster to not rotate Windows and just set the -autorol or -autoror options so that vertical games are set for when the screen is vertical and horizontal for when the screen are horizontal.
You could set -aspect_ratio 3:4 though.

> I don't like the way direct draw makes the games look...

Eh?
If your card does bilinear filtering with ddraw and not without then use d3d and turn it off.
Not using at least ddraw is daft imho.



--
Paul