How do I make DOSBox show in full screen mode?

Question

I have enable FullScreenmode in Dosbox under Ubuntu 12.04 . But still i am not getting it in Fullscreen. My turbo c++ windows is less than my screen size.

Answer 1

First, press ctrl + F10 to lock mouse to dosbox and then try alt + Enter.

Answer 2

You need to edit dosbox-0.74.conf as given below

Go to terminal and type gedit /home/<USER_NAME>/.dosbox/dosbox-0.74.conf

and make these changes:

fullscreen=true
fulldouble=true
fullresolution=1366x768
windowresolution=1366x768
output=opengl  #**MOST IMPORTANT** 
autolock=true

Now save the file and open dosbox. It should be fullscreen with full workspace.

NOTE : Original source of this answer : Click Here

Answer 3

• Goto /home/user/dosbox.conf
• Find resolution
• Change fullresolution from original to your choice (eg. fullresolution=640x480)
• Leave windowresolution intact (i.e, windowresolution=original) as you might want a smaller sized window.

Optional: change fullscreen to true (i.e, fullscreen=true) if you want to start dosbox in fullscreen mode

Answer 4

I think the Alt-Enter command makes DOSBox go full-screen. That might not be your problem, though.

Answer 5

fullresolution=auto
windowresolution=auto

for me auto setting on these two functions, works better.

Ctrl+F10 is for accessing mouse

Alt+Enter is to switch from full screen to small.

Answer 6

Severus Tux solution worked on my raspberry pi, but took up far too much computing power. Extreme lag and overheating followed from just rendering the dos prompt.

Another solution is to change the "scaler" parameter to a size that fits your screen the best. you can either double, or tripple the number of pixels used:

scaler=normal2x forced

or

scaler=normal3x forced

pick the one that fits your fullscreen mode the best.

Answer 7

Inside the Dosbox conf files inside ScummVM files, it uses:

output=overlay

(Also a youtuber recommended)

fullresolution=0x0x

Also for RetroPie DosBox, it had the settings here:

~/.dosbox/dosbox-SVN.conf

Answer 8

First, let's mention that all configuration info is available here https://www.dosbox.com/wiki/Dosbox.conf

Regarding your question:

1. Where is the config file on Linux ?

For Linux the configfile is created on the first run in ~/.dosbox/ The name is dosbox-{version}.conf where version is currently 0.74

-> Your config file is here: /home/<USER_NAME>/.dosbox/dosbox-0.74.conf

2. What are the full-screen related settings in this config file ?

fullscreen = true | false
fulldouble = true | flase

-> edit /home/<USER_NAME>/.dosbox/dosbox-0.74.conf

and set:

fullscreen = true
fulldouble = true

3. Bonus

Changing full-screen mode at runtime (as per this answer )

Ctrl+F10 to lock/unlock mouse in DOSBOX window (if needed)

Alt+Enter to toggle DOSBOX's full-screen mode