> The MFCG_SCREEN_RAW_PARAMS line usually is a "translation" of the game schematics > video section. The refresh rate is derived from the parameters in there - the same as > on the real board. > > Should your measurements reveal different values to the refresh rate displayed in the > mame ui, we are of course interested to hear about it.
Ok, thanks for the explanation. For example I Measured the Vsync of a Pyros oginal Toaplan at 54.879 Hz, in MAME it's at 54.000000 Hz.looking at wardner.c there is: