> > > EDIT 2: The game selection screen also looks oddly blueish... which does seem > > > consistent with the other posted video! > > > > That just looks like the guy had the blue on the RGB knobs turned up too much, or > the > > G and R turned down too much. You sometimes have to adjust them for every pcb and > he > > didn't do it correctly for this game. > > see smf's reply, it's a weird issue with monitors that adjust their base voltage > according to what it is at a certain position in vblank / vblank etc. > > most do this, but not all. > > maybe if one day MAME emulates different types of monitors (which in itself could add > another frame of lag) we might see simulation of how each different one reacts to the > signal, but until then MAME just assumes 'perfect, base voltage = 0 / black' while > many monitors will do something else entirely.
In regard to the bluish pic I was responding to, that is clearly from a pcb recording setup where they have the blue adjusted wrong. It's not a pic of a monitor causing an issue or else you would see scanlines. The pcb goes to the rgb converter then the converter goes to the PC capture card and could also be split to also go to a monitor but that wouldn't change the look of the capture.