DOSBox-X - screen size

[TedMaul]

Hello, I've been trying the solutions suggested here for the problem of having a small DOSBox screen without being able to expand it to meet the size of my monitor (in this case, a television).

My .conf file looks like this at the moment:

[sdl]

fullscreen=true
fullresolution=1080x720
windowresolution=1080x720
output=ddraw

[dosbox]
title=Windows 95
memsize=480
a20=mask

[video]
vmemsize=8
vesa modelist width limit=0
vesa modelist height limit=0

[dos]
# Set 'ver=7.1' if using Win95 OSR2 (95B) or later
ver=7.1
hard drive data rate limit=0

[cpu]
cputype=pentium_mmx
core=normal

[sblaster]
sbtype=sb16vibra

[fdc, primary]
int13fakev86io=true

[ide, primary]
int13fakeio=true
int13fakev86io=true

[ide, secondary]
int13fakeio=true
int13fakev86io=true
cd-rom insertion delay=4000

[render]
scaler=normal3x
aspect=true

[autoexec]

This has managed to centre the image, but it won't go any larger no matter which dimensions I change for fullresolution.

I have also tried adding a "dosbox-x" section to the emulators.cfg in opt/retropie/configs (it is in a folder for an additional system I added for Windows 3.x/9x systems) but this hasn't done a lot.

Is there a way of adapting my current shell script that launches DOSBox-X to allow it to launch an XINIT as well, as the solution suggested? Currently it says this:

#!/bin/bash
sudo /home/pi/dosbox-x/src/dosbox-x -conf "/opt/retropie/configs/pc/TEST98.conf"

Other than that, are there any suggestions?
Thank in advance for any pointers.

Additional info:
Raspberry Pi 4B, running RetroPie 4.7.1, built from premade image on RetroPie website
Standard power supply

[mitu]

If you've defined your own dosbox-x entry in emulators.cfg, you just need to prefix the emulator command with XINIT: to make it use xorg to launch:

#regular entry 
dosbox-x = '/home/pi/launch-dosbox-x.sh'
# start with Xorg
dosbox-x= 'XINIT:/home/pi/lanch-dosbox-x.sh'

Also, remove the sudo, it's useless and not recommended.

If you wish to try without xorg, you should make sure Dosbox-X is compiled with SDL2 and not SDL1, it should behave better on the Pi4.

[TedMaul]

@mitu Thanks for replying so quickly - I've added those lines in emulators.cfg in both /opt/retropie/configs/pc and /opt/retropie/configs/windows but haven't seen a difference yet, is there a way of telling if xorg has launched?

dosbox = "bash /home/pi/RetroPie/roms/pc/+Start\ DOSBox.sh %ROM%"
default = "dosbox"
dosbox-sdl2 = "bash /home/pi/RetroPie/roms/pc/+Start\ DOSBox-SDL2.sh %ROM%"
lr-dosbox-pure = "/opt/retropie/emulators/retroarch/bin/retroarch -L /opt/retropie/libretrocores/lr-dosbox-pure/dosbox_pure_libretro.so --config /opt/retropie/configs/pc/retroarch.cfg %ROM%"
dosbox-x = "XINIT:/home/pi/RetroPie/roms/pc/+DOSBox-X.sh"

Also it appears to have compiled with SDL1; how could I remedy this? I think I initially installed it from terminal.
Thanks for your help!

[mitu]

@tedmaul said in DOSBox-X - screen size:

is there a way of telling if xorg has launched?

You can check /dev/shm/runcommand.log and see if xinit was used to launch your script.

Also it appears to have compiled with SDL1; how could I remedy this?

If you manually compiled it, then there's a build script that compiles dosbox-x with SDL2 support - build-debug-sdl2.

[TedMaul]

@mitu thanks,it looks like xinit wasn't launching but in any case changing to SDL2 has made it much better! Much appreciated.