ok..pomyślmy..
[sdl]
# fullscreen -- Start dosbox directly in fullscreen.
# fulldouble -- Use double buffering in fullscreen.
# fullfixed -- Don't resize the screen when in fullscreen.
# fullresolution -- What resolution to use for fullscreen, use together with fullfixed.
# output -- What to use for output: surface,overlay,opengl,openglnb.
# hwscale -- Extra scaling of window if the output device supports hardware scaling.
# autolock -- Mouse will automatically lock, if you click on the screen.
# sensitiviy -- Mouse sensitivity.
# waitonerror -- Wait before closing the console if dosbox has an error.
# priority -- Priority levels for dosbox: lower,normal,higher,highest.
# Second entry behind the comma is for when dosbox is not focused/minimized.
# mapperfile -- File used to load/save the key/event mappings from.
fullscreen=true
fulldouble=false
fullfixed=true
fullresolution=320x240
output=surface
hwscale=1.00
autolock=false
sensitivity=100
waitonerror=true
priority=higher,normal
mapperfile=mapper.txt
masz 1/4 ekranu...
czyli fullresolution=640x480
i fullfixed na 0?