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| Advancemame users: sync polarity parameter? |
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| Ummon:
Does anyone know what the parameter in Advancemame is for switching the sync polarity? |
| Ummon:
This is the passage in the 'install' doc: --- Quote ---If the monitor accepts a composite sync signal, instead of using a sync conversion circuits you can also try twisting the two H and V VGA signal together. It works if you select VGA negative H and V sync on the programs. --- End quote --- Okay, and what is this? I know that putting a '-' or '+' by the h/vsync in a modeline can affect this, but I'm looking for a global effect. |
| NickG:
--- Quote from: Ummon on May 17, 2008, 03:56:47 am ---This is the passage in the 'install' doc: --- Quote ---If the monitor accepts a composite sync signal, instead of using a sync conversion circuits you can also try twisting the two H and V VGA signal together. It works if you select VGA negative H and V sync on the programs. --- End quote --- Okay, and what is this? --- End quote --- It changes the sync polarity. If your monitor video processing circuits can accept either polarity of signal then it should not change anything. If your monitor is more "finicky", it may cause rolling or a slightly shifted over and/or down image. If you are using a composite (or twisted) sync line then you should probably match the polarity of the sync, and try both H and V as negative first, if your picture is rolling. Edit: technically you should try to hunt down your monitor specs before going about a trial and error method, so as not to cause damage... |
| Ummon:
<edit> |
| Ummon:
I meant, what is this parametre to be entered in the rc file? He seems to refer to one and then doesn't say what it is. I get Windows and Mame by wiring the contacts together and doing nothing else. |
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