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Looking for hardware / encoder advice - what should I order?
AndyWarne:
The J-PAC does not convert the video, it only amplifies the signal. So you would need to send a suitable 25Khz-res signal to the monitor.
The ArcadeVGA can do this, at least once Windows has started. It will send a 15Khz signal until that point which the monitor will not display.
Once you have a working resolution of 512 X 384, all games (except those which were originally 25Khz) will need to have hardware stretch or D3D scaling enabled. This is not much different from running a normal PC monitor with Mame, using a normal VGA card, and stretching is by default enabled in Mame.
The difference is that if you are using a PC monitor you have (for example) 1280 X 1024 or whatever resolution Windows is set at, which Mame, helped by the video card drivers and hardware, can re-sample the game screen onto. As this would be a relatively high resolution compared to the game resolution, the results are good (although not much like an arcade monitor).
With a medium-res monitor fixed at 512 X 384, and a game wich runs for example at 320 X 240, there is not a great deal of leeway for the re-sampling to work with and also the two resolutions are not exact multiples. So the result is generally not so good because in order to scale, lines will need to be inserted by the scaling process, and these lines will be visible owing to the relatively low resolution being used by the monitor.
But at least all games will run, its just a case of whether the result is acceptable.
Andy
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