Dosbox Games Running at low Resolutions (Tiny Game Screen)

[cerealspiller]

Hello! I'm have great success getting some of my old dos games working on my Retropie through Dosbox. I hit a snag when I tried running Settlers 1 (Serf City: Life is Feudal). When the game starts, it's displayed in a very small resolution (320x240 maybe?) at the center of the screen.

Here's my config file I use to launch the game:

output=opengl
fullresolution=0x0

[joystick]
timed=false

[autoexec]
# Lines in this section will be run at startup.
# You can put your MOUNT lines here.

mount c "/home/pi/RetroPie/roms/pcdos/Settlers"
c:
serf.exe

I've tried a few other options other than the fullresolution and output settings, but nothing as worked so far. When i search for solutions online, most of the fixes are for PC's or aren't relevant to my situation. Has anyone else come across this before? How do I run this game at a larger resolution?

[A Former User]

I believe these are the lines you need to look at.
In this file --> dosbox-SVN.conf

Found here --> /opt/retropie/configs/pc

fullresolution=
aspect=
scaler=

Use your monitor's native resolution for the first option.
Use aspect=true, if you want the correct aspect ratio - after scaling. False, if you want it stretched to fill your monitor.
scaler=XXXX - XXXX=your scaler of choice...none, normal2x, normal3x, advmame2x,....etc... Use this to scale the image.