DOS (DOSBox)

Background

DOSBox is a multiplatform DOS-emulator

The DOSBox core has been authored by

  • DOSBox Team

The DOSBox core is licensed under

A summary of the licenses behind RetroArch and its cores have found here.

Extensions

Content that can be loaded by the DOSBox core have the following file extensions:

  • .exe
  • .com
  • .bat
  • .conf

RetroArch database(s) that are associated with the DOSBox core:

Features

Frontend-level settings or features that the DOSBox core respects.

Feature Supported
Restart
Screenshots
Saves -
States
Rewind
Netplay
Core Options
RetroAchievements
RetroArch Cheats
Native Cheats
Controls
Remapping
Multi-Mouse
Rumble
Sensors
Camera
Location
Subsystem
Softpatching
Disk Control
Username
Language
Crop Overscan
LEDs

Directories

The DOSBox core's library name is 'DOSBox'

Geometry and timing

  • The DOSBox core's core provided FPS is 60.0
  • The DOSBox core's core provided sample rate is (Rate)
  • The DOSBox core's base width is 320
  • The DOSBox core's base height is 200
  • The DOSBox core's max width is 1024
  • The DOSBox core's max height is 768
  • The DOSBox core's core provided aspect ratio is 4/3

Loading content

  • To use you can either load an exe/com/bat file or a *.conf file.
  • If loading exe/com/bat the system directory will be searched for a 'dosbox.conf' file to load. If one isn't available default values will be used. This mode is equivalent to running a DOSBox binary with the specified file as the command line argument.
  • If loading a conf file DOSBox will be loaded with the options in the config file. This mode is useful if you just want to be dumped at a command prompt, but can also be used to load a game by putting commands in the autoexec section.
  • To be useful the frontend will need to have keyboard+mouse support, and all keyboard shortcuts need to be remapped.

Usage

DOSBox can load DOS executables or custom config files. To get started you can generate a config file by creating the DOSbox folder in your libretro SYSTEM directory, and then loading any DOS application, exit back to the command interpreter and then run config -wcd, Configuration files allow you far better control than core options so far. Eventually every single useable option will be exposed but in the meantime combining both is the best alternative.

If you generate a default config it will always be loaded by default, but you can override it by saving your custom settings, preferably in the game folder. You can create a config like this:

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[autoexec]
@echo off
mount d "/storage/roms/dos/game"
d:
game.exe
Then you can store this config in the game folder (or any other directory) and just the config instead of the exe file. Once you change a setting using the config command or via core options, you can always update the config file by using config -wc

MIDI

  • To use MIDI you need MT32_CONTROL.ROM and MT32_PCM.ROM in the system directory of RetroArch.Then set:
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[midi]
mpu401=intelligent
mididevice=mt32

Core options

The DOSBox core has the following option(s) that can be tweaked from the core options menu. The default setting is bolded.

Settings with (Restart) means that core has to be closed for the new setting to be applied on next launch.

  • Machine type [dosbox_machine_type] (vgaonly|svga_s3|svga_et3000|svga_et4000|svga_paradise|hercules|cga|tandy|pcjr|ega)

    Select what machine will be emulated.

  • Gamepad emulated mouse [dosbox_emulated_mouse] (enable|disable)

    CPU cycles are divided in core options to allow fine control of the desired CPU cycles. Setting this too low may cause slow gameplay, setting this too high might cause sound crackling and bad performance.

  • CPU cycles x 100000 [dosbox_cpu_cycles_0] (0|1|2|3|4|5|6|7|8|9)

    CPU cycles are divided in core options to allow fine control of the desired CPU cycles. Setting this too low may cause slow gameplay, setting this too high might cause sound crackling and bad performance.

  • PU cycles x 10000 [dosbox_cpu_cycles_1] (0|1|2|3|4|5|6|7|8|9)

    CPU cycles are divided in core options to allow fine control of the desired CPU cycles. Setting this too low may cause slow gameplay, setting this too high might cause sound crackling and bad performance.

  • CPU cycles x 1000 [dosbox_cpu_cycles_2] (1|2|3|4|5|6|7|8|9|0)

    CPU cycles are divided in core options to allow fine control of the desired CPU cycles. Setting this too low may cause slow gameplay, setting this too high might cause sound crackling and bad performance.

  • CPU cycles x 100 [dosbox_cpu_cycles_3] (0|1|2|3|4|5|6|7|8|9")

    CPU cycles are divided in core options to allow fine control of the desired CPU cycles. Setting this too low may cause slow gameplay, setting this too high might cause sound crackling and bad performance.

User 1 - 2 device types

The DOSBox core supports the following device type(s) in the controls menu, bolded device types are the default for the specified user(s):

  • None - Input disabled.
  • Gamepad - Joypad
  • Joystick - Analog
  • Keyboard - Keyboard - Keyboard inputs are always active. Has keymapper support.

Joypad

Input descriptors for Gamepad 2 Button RetroPad Inputs
Button 2
Button 1
D-Pad Up
D-Pad Down
D-Pad Left
D-Pad Right
Input descriptors for Gamepad 4 Button RetroPad Inputs
Button 3
Button 1
D-Pad Up
D-Pad Down
D-Pad Left
D-Pad Right
Button 4
Button 2
Input descriptors for Joystick 2 Button RetroPad Inputs
Button 2
Button 1
Left Analog X X
Left Analog Y Y
Input descriptors for Joystick 4 Button RetroPad Inputs
Button 3
Button 1
Button 4
Button 2
Left Analog X X
Left Analog Y Y
Right Analog X X
Right Analog Y Y
Input descriptors for Keyboard RetroPad Inputs
Esc
Enter
Kbd Up
Kbd Down
Kbd Left
Kbd Right
Input descriptors for Emulated mouse RetroPad Inputs
Emulated Mouse Right Click
Emulated Mouse Left Click
Emulated Mouse X Axis X
Emulated Mouse Y Axis Y

Keyboard

RetroKeyboard Inputs Keyboard
Keyboard Backspace Backspace
Keyboard Tab Tab
Keyboard Return Enter
Keyboard Pause Pause
Keyboard Escape Escape
Keyboard Space Space
Keyboard ' '
Keyboard , ,
Keyboard . .
Keyboard / /
Keyboard 0 0
Keyboard 1 1
Keyboard 2 2
Keyboard 3 3
Keyboard 4 4
Keyboard 5 5
Keyboard 6 6
Keyboard 7 7
Keyboard 8 8
Keyboard 9 9
Keyboard ; ;
Keyboard - -
Keyboard = =
Keyboard [ [
Keyboard \ \
Keyboard ] ]
Keyboard |
Keyboard a a
Keyboard b b
Keyboard c c
Keyboard d d
Keyboard e e
Keyboard f f
Keyboard g g
Keyboard h h
Keyboard i i
Keyboard j j
Keyboard k k
Keyboard l l
Keyboard m m
Keyboard n n
Keyboard o o
Keyboard p p
Keyboard q q
Keyboard r r
Keyboard s s
Keyboard t t
Keyboard u u
Keyboard v v
Keyboard w w
Keyboard x x
Keyboard y y
Keyboard z z
Keyboard Delete Delete
Keyboard Numpad 0 Numpad 0
Keyboard Numpad 1 Numpad 1
Keyboard Numpad 2 Numpad 2
Keyboard Numpad 3 Numpad 3
Keyboard Numpad 4 Numpad 4
Keyboard Numpad 5 Numpad 5
Keyboard Numpad 6 Numpad 6
Keyboard Numpad 7 Numpad 7
Keyboard Numpad 8 Numpad 8
Keyboard Numpad 9 Numpad 9
Keyboard Numpad . Numpad .
Keyboard Numpad / Numpad /
Keyboard Numpad * Numpad *
Keyboard Numpad - Numpad -
Keyboard Numpad + Numpad +
Keyboard Numpad Enter Numpad Enter
Keyboard Up Up
Keyboard Down Down
Keyboard Right Left
Keyboard Left Right
Keyboard Insert Insert
Keyboard Home Home
Keyboard End End
Keyboard Page Up Page Up
Keyboard Page Down Page Down
Keyboard F1 F1
Keyboard F2 F2
Keyboard F3 F3
Keyboard F4 F4
Keyboard F5 F5
Keyboard F6 F6
Keyboard F7 F7
Keyboard F8 F8
Keyboard F9 F9
Keyboard F10 F10
Keyboard F11 F11
Keyboard F12 F12
Keyboard Num Lock Num Lock
Keyboard Caps Lock Caps Lock
Keyboard Scroll Lock Scroll Lock
Keyboard Right Shift Right Shift
Keyboard Left Shift Left Shift
Keyboard Right Control Right Control
Keyboard Left Control Left Control
Keyboard Right Alt Right Alt
Keyboard Left Alt Left Alt
Keyboard Sys Req Print Screen