QUOTE(Likklebaer @ Aug 2 2009, 04:00 PM)
MAMEoX (and so I'm guessing CoinOPS too) uses decimal percentage values in its ini file to set the screen size. The X value is a decimalised percentage of 640 and the Y value is a decimalised percentage of 480.
So you just divide the size you want by either 640 or 480 and that will give you the value to enter. So, for example, to set a vertical size of 448 you would do 448/480=0.933333 and enter 0.933333 in the MAMEoX ini file.
This is the real truth...
But not worked flawlessly for me!
Sometimes I did try, for example, 0.933333 and - when inspected in the running game - still there was a very one single distortion, a small one... and I needed to "refine" the setup by adjusting by hand, in the emulator option, changing from the math result 0.9333333 to 0.9333334, 0.933332 or something like that (random number values just to illustrate).
CoinOPS could be much more easy to adjust if it could use the XPORT method of adjustment! I mean - to be able to adjust the screen WHILE INSIDE A GAME, with the game screen running. This saves a lot of trouble. On the actual method you have just a damn black screen to adjust the size, no NUMBERS! No guides, no nothing! And you need to enter the game, test, exit the game, config, enter the game again, yadda yadda yadda.