[Data]

dos games in general run on 320x200
a scaler makes the image larger
(usually 640x400)
in dosbox:
normal2x does exactly do this.
all the other scalers enhance the image a bit while making it bigger.
enhanching would be either interpolation or some advanched (intelligent routine that checks surrounding pixels.



frameskip
This orders dosbox not to draw all frames. this lowers the power needed to run the game. (as drawing a screen especially with scalers takes a lot of power)
frameskip=1 means that 1 frame is drawn and 1 skipped.
This is usually the best setting.

Officially dosbox (and screens in the dos era) run on 70 hz (one mode is 60 hz) (hz=screens per second)
so frameskip=1 means that dosbox will draw only 35/30 frames per second.