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Old 18 May 2003, 07:59   #2
IFW
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Join Date: Jan 2003
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Age: 45
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60hz is NTSC, 50Hz is PAL.
If you really want to run NTSC software set the chipset to NTSC, and set the frequency of the resolution you are running UAE in to a multiple of 60, ie 60, 120, 180 etc.
Also select default refresh rate for the desired resolution in UAE, or 60/120 Hz and vsync to be on the safe side, just in case your video card driver allows programmable refresh rate changes through DirectX. Be aware that if you have a developer version of DirectX you may have different preferences set that automatically override any refresh rate request.
Start UAE and when it has its own screen check on your monitor OSD that what you get is indeed the desired refresh rate (sometimes it may be off a bit, like 59...61, this is due to refresh rate fractions.) If your monitor does not show the correct refresh rate mess with the video card's driver or a 3rd party tool until it does...
So long the emulated video chipset's display frequency differ from the monitor refresh rate you'll see constantly changing or incorrect refresh rates, simply because that is how programs can compensate for the differences, there is no way around it.
The lowest monitor frequency where you can run both PAL and NTSC programs without changing the refresh rate is 300Hz...
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