Hi,
1. To change resolution is dosbox you can change the fullresolution=original in dosbox.conf to a custom resolution, for example it could be fullresolution=480x272 (this is in the first section labelled [SDL] in the dosbox.conf)
2. Yes, it does support frame skipping. In the third section of dosbox.conf called [render] there is an option called frameskip. The default is 1 but you should be able to change this to anything you want (not too high or it will look like lag). Also in the render section there are some options to check/change the aspect ratio, you can try these but apparantly they lag.
Hope this helps,
Angus
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