From PCGamingWiki, the wiki about fixing PC games
(Redirected from DOS)
DOSBox logo.png
Developer(s) DOSBox Team
First release date July 22, 2002

Key points

DOSBox allows DOS-based games to run properly on modern systems.

General information

Official DOSBox site
Official DOSBox wiki

Essential improvements[edit]

Graphical user interface[edit]

DOSBox does not use a graphical user interface. However, front ends such as D-Fend Reloaded (an updated successor to the program D-Fend) can be used.

D-Fend Reloaded[edit]

Does not require DOSBox to be installed.

Unofficial builds[edit]

There are various unofficial builds of DOSBox which provide additional functionality such as support for Glide. A full list can be found on the DOSBox Wiki.

For Windows and Linux, a good one to start with is DOSBox SVN Daum. It streamlines the interface and adds support for features vanilla DOSBox cannot do such as Glide support. It is used in some of's DOS game releases.

It can be downloaded from the Official Site.

For Mac, you should try Boxer. It makes running and installation of games easier by wrapping them in Application Bundles, called "Game Boxes", that can be launched in Boxer by double clicking them as well as having a builtin GUI interface for configuration that more easily integrates into the Mac OS. It also has much over looked audio features; it already includes Gravis UltraSound patches and has builtin CM-32 & MT-32L emulation available through MUNT.

Windows installation[edit]

Windows 95 and Windows 98 can be installed inside DOSBox however this is unsupported and instability issues occur.

Example input[edit]

DOSBox running in Windows:

Z:\>mount c c:\game_directory
Z:\>imgmount d d:\game_disc.iso -t iso
Z:\>cd d:\
D:\>cd c:\

Substitute the pathways with the given conventions of the host operating system.

Alt+ Enter to maximise the window; Ctrl+F4 to switch between mounted disc images. Use double quotes, " ", when mounting folders with spaces ("c:\installation folder"); For mounting multiple disc images, -t iso is required only once at the end of the last disc image, this defines how DOSBox should emulate the volume and iso defines the type of volume.

DOSBox configuration[edit]

DOSBox stores configuration information in *.conf files. Individual conf files can be create for each piece of software used and additional parameters can be appended.

To modify a configuration option within DOSBox, use the config command. For example, config cpu cycles fixed 30000

Video settings[edit]

Graphics option Option Notes
Widescreen resolution
Depends on game being emulated. Also a wide(-ish) option can be made available by disabling aspect correction, though usually only works on the 320x200 resolution mode.
4K Ultra HD
Field of view (FOV)
Depends on game being emulated (not implemented by DOSBox it's self).
Toggle with Alt+ Enter.
Borderless fullscreen windowed
Anisotropic filtering (AF)
Anti-aliasing (AA)
Similar setting is available in the from of DOSBox upscaling (advmame2x, hq2x, etc.).
Vertical sync (Vsync)
See Unofficial builds.
60 FPS
120+ FPS
Color blind mode
Depends on game being emulated (not implemented by DOSBox it's self).

Input settings[edit]

Keyboard and mouse Native Notes
See Mapper.
Mouse acceleration
Mouse sensitivity
Adjustable in DOSBox configuration settings.
Mouse input in menus
Depends on game being emulated (not implemented by DOSBox it's self).
Mouse Y-axis inversion
Controller support
See Controller support.
Full controller support
Controller remapping
Controller sensitivity
Controller Y-axis inversion
Additional information
Button prompts
Controller hotplugging
Haptic feedback


The DOSBox Mapper (Ctrl+F1/ Command+F1) can be used to reassign keyboard, mouse and joystick commands.

Controller support[edit]

DOSBox has several virtual joystick modes which affect what inputs are seen in-game and also what inputs can be remapped using the Mapper. See the DOSBox manual for details.

Issues fixed[edit]

Green or black screen in fullscreen mode[edit]

With some video cards, DOSBox's default output mode will render with a green or black screen in fullscreen mode.
Edit DOSBox configuration file ( versions)
  1. Edit the DOSBox configuration file (dosbox-0.74.conf, dosbox.conf, or similar).
  2. Change output=surface to output=overlay
  3. Save your changes and run the game again.
If the problem persists, edit it again and try different modes until you get one that works.
Run Graphic Mode Setup ( versions)
  1. Run the game's Graphic Mode Setup in the Start Screen/Start Menu.
  2. Change Graphic mode to "Overlay" or "DDraw".
  3. Choose Save Settings and run the game again.
If the problem persists, run it again and try different modes until you get one that works.

Character/camera/cursor constantly moves in one direction[edit]

Change joystick timing setting
  1. Edit the game's DOSBox configuration file.
  2. Change timed=true to timed=false (if it is already set to this, try timed=true instead).
  3. Save your changes and run the game again.
Disable joystick support
This fix is only suitable if you don't want to use a controller with the game.
  1. Edit the game's DOSBox configuration file.
  2. Change the joysticktype value to none
  3. Save your changes and run the game again.

Can't remap keys/joystick[edit]

Some games have fixed inputs. Use the DOSBox Mapper to remap the controls.

Can't open Steam overlay in-game[edit]

The Steam overlay only works in some output modes; OpenGL seems to work the best.[1]
Change output in configuration file[1]
  1. Go to the game's installation folder and edit the DOSBox configuration file (.conf).
  2. Change output= to read output=OpenGL
  3. Change fullresolution= to read fullresolution=desktop for the best overlay resolution.
  4. Save your changes. The Steam overlay should now work in-game.

Printer support[edit]

Official DOSBox builds don't support printing in games that use it.
Enable printer support
  1. Download the latest version of DOSBox SVN Daum.
  2. Install it over top of the game's existing DOSBox version.
  3. Edit the game's configuration file and add the following lines at the bottom:

  1. Start the game normally.
  2. When you are ready to print, first switch into windowed mode (Alt+ Enter) to ensure you can see the printer dialog box.
If a menu bar is visible in fullscreen mode after making this change, ensure output= is not set to OpenGL.
The printer selection window is only shown once per session; relaunch the game to change printers.


  1. 1.0 1.1 Adding DOSBox to Steam Client and enabling Steam Overlay, page 1 - Forum -