= dosbox-x(1)
DOSBox-X is maintained by the DOSBox-X Team
:doctype: manpage
:manmanual: dosbox-x
:mansource: dosbox-x

== Name
dosbox-x - a x86/DOS and PC98 emulator

== Synopsis
*dosbox-x* [_OPTIONS_] [_FILE_]

== Description
This manual page briefly documents DOSBox-X, an x86/DOS and PC98 emulator.

Options are listed below. Depending on the option, one or more may be specified.

The optional _FILE_ argument should be a DOS executable or a directory.
If it is a DOS executable (.com .exe .bat), the program will run automatically.
If it is a directory, the directory specified will be mounted as the C:\ drive.
If the DOS executable requires parameters, enclose the command and its parameters in quotes.

For an introduction type _INTRO_ inside dosbox-x.

== Options
A summary of available options.

*-?*, *-h* or *-help*::
  Display the help screen and exit.
*-v*, *-ver* or *-version*::
  Display the version information and exit.
*-fullscreen*, *-fs*::
  Start dosbox-x in fullscreen mode.
*-machine* _machinetype_::
  Start dosbox-x with a specific machine type.  Valid choices are:
+
--
* *mda*
+
IBM Monochrome Display Adapter (text only)
+
* *hercules*
+
Hercules Graphics Card (monochrome)
+
* *cga*
+
IBM Color Graphics Adapter, with automatic RGB/Composite switching.
+
* *cga_mono*
+
IBM CGA attached to a monochrome display
+
* *cga_rgb*
+
IBM CGA attached to an RGB monitor
+
* *cga_composite*
+
IBM CGA (early revision) attached to an NTSC TV
+
* *cga_composite2*
+
IBM CGA (late revision) attached to an NTSC TV
+
* *pcjr*
+
IBM PCjr
+
* *pcjr_composite*
+
IBM PCjr (late revision) attached to NTSC TV
+
* *pcjr_composite2*
+
IBM PCjr (late revision) attached to NTSC TV
+
* *tandy*
+
Tandy 1000 Graphics Adapter
+
* *amstrad*
+
Amstrad PC1512 graphics mode
+
* *ega*
+
IBM Enhanced Graphics Adapter
+
* *jega*
+
Japanese Enhanced Graphics Adapter (Microsoft AX)
+
* *mcga*
+
IBM Multi-Color Graphics Array
+
* *vgaonly*
+
IBM Video Graphics Array (see below)
+
* *svga_paradise*
+
SVGA - Paradise Systems PVGA1A
+
* *svga_et3000*
+
SVGA - Tseng Labs ET3000
+
* *svga_et4000*
+
SVGA - Tseng Labs ET4000
+
* *svga_s3*
+
VESA SVGA - S3 Trio64 - VBE 2.0
+
* *svga_s386c928*
+
VESA SVGA - S3 86c928 - VBE 2.0 (experimental)
+
* *svga_s3vision864*
+
VESA SVGA - S3 Vision 864 - VBE 2.0
+
* *svga_s3vision868*
+
VESA SVGA - S3 Vision 868 - VBE 2.0
+
* *svga_s3vision964*
+
VESA SVGA - S3 Vision 964 - VBE 2.0
+
* *svga_s3vision968*
+
VESA SVGA - S3 Vision 968 - VBE 2.0
+
* *svga_s3trio32*
+
VESA SVGA - S3 Trio32 - VBE 2.0
+
* *svga_s3trio64*
+
VESA SVGA - S3 Trio64 - VBE 2.0 (same as *svga_s3*)
+
* *svga_s3trio64v+*
+
VESA SVGA - S3 Trio64V+ - VBE 2.0
+
* *svga_s3virge*
+
VESA SVGA - S3 ViRGE - VBE 2.0 (experimental)
+
* *svga_s3virgevx*
+
VESA SVGA - S3 ViRGE VX - VBE 2.0 (experimental)
+
* *vesa_oldvbe*
+
VESA SVGA - S3 Trio64 with VESA BIOS Extensions (VBE) 1.2
+
* *vesa_oldvbe10*
+
VESA SVGA - S3 Trio64 with VESA BIOS Extensions (VBE) 1.0
+
* *vesa_nolfb*
+
VESA SVGA - S3 Trio64 with VBE 2.0 with Linear Frame Buffer disabled
+
* *pc98*
+
Japanese NEC PC-98 emulation
+
* *pc9801*
+
same as *pc98*
+
* *pc9821*
+
same as *pc98*
+
* *fm_towns*
+
Japanese Fujitsu FM Towns (not implemented)
+
--

The default is *svga_s3*.

For some special VGA effects the machinetype *vgaonly* can be used, note that this disables SVGA capabilities and might be slower due to the higher emulation accuracy.

NOTE: The _machinetype_ affects not only the emulated video card, but may also effect the available sound cards.

*-conf* _configfile_::
Start dosbox-x with the options specified in _configfile_. This file may also have a section called _[autoexec]_ in which you can put commands you wish to execute on startup.
Multiple *-conf* options with _configfiles_ can be specified and they will be overlaid on each other.
*-editconf* [_editor_]::
Open the default configuration file in a text editor. If no editor name is given, then use the program from the EDITOR environment variable.
*-userconf*::
Load the configuration file located in ~/.config/dosbox-x. Can be combined with the *-conf* option.
*-printconf*::
Prints the location of the default configuration file and exit.
*-eraseconf*, *-resetconf*::
Removes the default configuration file and exit.
*-erasemapper*, *-resetmapper*::
Removes the mapperfile configured in the clean default configuration file and exit.
*-opencaptures* _program_::
Calls program with as first parameter the location of the captures folder and exit.
*-opensaves* _program_::
Calls program with as first parameter the location of the saves folder and exit.
*-startui*, *-startgui* or *-starttool*::
Start DOSBox-X with GUI configuration tool.
*-startmapper*::
Start the internal keymapper on startup of dosbox-x. You can use it to change the keys dosbox-x uses.
*-promptfolder*::
Prompt for the working directory when DOSBox-X starts.
*-nopromptfolder*::
Do not prompt for the working directory when DOSBox-X starts.
*-nogui* or *-nomenu*::
Do not show the GUI menu bar when in windowed mode.
*-showcycles*::
Show cycles count (FPS) in the title.
*-showrt*::
Show emulation speed relative to realtime in the title.
*-socket* _socketnumber_::
Passes the TCP socket number _socketnumber_ for the nullmodem emulation.
See the WIKI for details.
*-savedir* _path_::
Set path for the save slots.
*-defaultdir* _path_::
Set the default working path for DOSBox-X.
*-defaultconf*::
Use the default config settings for DOSBox-X.
*-defaultmapper*::
Use the default key mappings for DOSBox-X.
*-date-host-forced*::
Force synchronization of date and time with the host.
*-display2* [_color_]::
Enable both standard & monochrome dual-screen mode. The monochrome display defaults to white, but can optionally be set to _green_ or _amber_.
*-lang* _message_file_::
Start dosbox-x with the language specified in _message_file_.
*-nodpiaware*::
Ignore (do not signal) Windows DPI awareness.
*-securemode*::
Enable  secure mode, which is meant to prevent a DOS program potentially gaining access to files outside directories mounted in the [autoexec] section of the config file.
It does this by running *Z:\SYSTEM\CONFIG.COM -securemode* after completing the [autoexec] section (which in turn disables any changes to how the drives are mounted "inside" dosbox-x).
It also disables various other CONFIG.COM options that could be exploited.
*-prerun*::
If _FILE_ is given, run it before the AUTOEXEC.BAT config section
*-hostrun*::
Enable START command, CLIP$ device and long filename (LFN) support
*-noconfig*::
Skips the [config] section of the loaded configuration file. This is equivalent to skipping CONFIG.SYS in DOS.
*-noautoexec*::
Skips the [autoexec] section of the loaded configuration file. This is equivalent to skipping AUTOEXEC.BAT in DOS.
*-exit*::
dosbox-x will close itself when the DOS program specified by _FILE_ ends.
*-silent*::
Run DOSBox-X silently and exit after executing the [autoexec] section of the loaded config file.
*-o* _option(s)_::
Provide command-line option(s) for [_FILE_] if specified.
*-c* _command_::
Runs the specified command before running [_FILE_].
Multiple commands can be specified.
Each command should start with *-c* though.
A command can be an Internal Program, a DOS command or an executable on a mounted drive.
If the command requires parameters, enclose the command and its parameters in quotes.
*-set* _section property=value_::
Set the config option (override any config file).
If the property contains spaces, ensure to enclose the string in quotes.
The section is the name of a dosbox-x config section such as *[video]* without the brackets.
Multiple *-set* commands may be specified.
If a property is unique, the section may be omitted.
e.g. *-set sdl output=ttf* is equivalent to *-set output=ttf*
*-time-limit* _seconds_::
Kill the emulator after _seconds_.
*-fastlaunch*::
Fast launch mode (skip the BIOS logo and welcome banner).
*-helpdebug*::
Show debug-related options and exit.

== INTERNAL INTERPRETER COMMANDS
*dosbox-x* Supports most of the internal DOS commands found in COMMAND.COM.
Help text is integrated for these commands in DOSBox-X, and will not be duplicated here.
An explanation of these commands can also be found on the DOSBox-X wiki on the Supported Commands page.

*ALIAS*, *ATTRIB*, *BREAK*, *CALL*, *CD*/*CDDIR*, *CHCP*, *CHOICE*, *CLS*,
*COPY*, *COUNTRY*, *CTTY*, *DATE*, *DEL*/*ERASE*, *DELTREE*, *ECHO*, *EXIT*,
*DIR*, *FOR*, *GOTO*, *HELP*, *IF*, *LFNFOR*, *LH*/*LOADHIGH*, *MD*/*MKDIR*,
*MORE*, *PATH*, *PAUSE*, *PROMPT*, *RD*/*RMDIR*, *REM*, *REN*/*RENAME*, *SET*,
*SHIFT*, *SUBST*, *TIME*, *TRUENAME*, *TYPE*, *VER*, *VERIFY*, *VOL*

== OTHER PROVIDED COMMANDS
In addition, the following extra commands are available on the emulated Z: drive:

NOTE: Some commands (like NE2000) are only present in case the corresponding feature is enabled.

- *Z:\4DOS*
+
--
*4DOS*, *4HELP*, *OPTION*, *BATCOMP*
--
- *Z:\BIN*
+
--
*EVAL*, *SHUTDOWN*, *DSXMENU*, *CWSDPMI*, *EMSMAGIC*, *UNZIP*, *ZIP*, *MPXPLAY*,
*DOSMID*, *CDPLAY*, *DOS4GW*, *DOS32A*, *DOSIDLE*, *UTF16*, *UTF8*, *AUTOTYPE*,
*ADDKEY*, *LS*, *TITLE*, *COLOR*, *SETCOLOR*
--
- *Z:\DOS*
+
--
*MEM*, *EDIT*, *PRINT*, *DISKCOPY*, *DEFRAG*, *FORMAT*, *FDISK*, *SYS*, *FC*,
*COMP*, *CHKDSK*, *BUFFERS*, *DEVICE*, *APPEND*, *XCOPY*, *SORT*, *REPLACE*,
*LASTDRIV*, *FILES*, *FCBS*, *FIND*, *MOVE*, *DEBUG*, *EDLIN*, *CHOICE*,
*DELTREE*, *TREE*, *LABEL*, *LOADFIX*, *MOUSE*, *MODE*, *KEYB*
--
- *Z:\DEBUG*
+
--
*HEXMEM32*, *HEXMEM16*, *A20GATE*, *BIOSTEST*, *INT2FDBG*, *NMITEST*, *LOADROM*,
*VESAMOED*, *VFRCRATE*
--
- *Z:\SYSTEM*
+
--
*PARALLEL*, *SERIAL*, *MIXER*, *CAPMOUSE*, *FLAGSAVE*, *CFGTOOL*, *RESCAN*,
*RE-DOS*, *COUNTRY*, *CONFIG*, *BOOT*, *MOUNT*, *IMGSWAP*, *IMGMAKE*,
*IMGMOUNT*, *INTRO*, *HELP*, *NE2000*
--
- *Z:\TEXTUTIL*
+
--
*CGA*, *CLR*, *EGA*, *VGA*, *DCGA*, *132X25*, *132X43*, *132X50*,
*132X60*, *80X25*, *80X50*, *80X60*
--

== SPECIAL KEYS
*CTRL-F7*::       CGA emulation only - Switch between early and late model IBM CGA emulation.
*CTRL-F8*::       CGA emulation only - Switch between Auto, RGBI and Composite monitor output emulation.
*CTRL-SHIFT-F7*:: CGA emulation only - Decrease Hue
*CTRL-SHIFT-F8*:: CGA emulation only - Increase Hue
*CTRL-F7*::       CGA Mono and Hercules emulation only - Cycle between Green, Amber, White and Grey
*CTRL-F8*::       CGA Mono and Hercules emulation only - Cycle between low and high brightness
*F12-F*::         Switch between fullscreen and window mode.
*F12-R*::         Reset the virtual machine inside DOSBox-X
*F12-B*::         Reboot the emulated DOS (integrated DOS or guest DOS) inside DOSBox-X.
*F12-C*::         Start DOSBox-X’s graphical configuration tool.
*F12-M*::         Start DOSBox-X’s mapper editor.
*F12-Esc*::       Show/hide DOSBox-X’s drop-down menu bar.
*F12-Del*::       Send the selected special key combination (Ctrl+Alt+Del by default) to the guest system.
*F12-{+}*::       Increase the sound volume of DOSBox-X’s emulated DOS.
*F12-{-}*::       Decrease the sound volume of DOSBox-X’s emulated DOS.
*F12-]*::         Increase the emulated DOS’s current speed relative to real-time.
*F12-[*::         Decrease the emulated DOS’s current speed relative to real-time.
*F12-{=}*::       Increase DOSBox-X’s emulation CPU cycles.
*F12-{-}*::       Decrease DOSBox-X’s emulation CPU cycles.
*F12-Up*::        Increase the font size for the TrueType font (TTF) output.
*F12-Down*::      Decrease the font size for the TrueType font (TTF) output.
*F12-Left*::      Reset the emulated DOS’s current CPU speed to the normal speed.
*F12-Right*::     Toggle DOSBox-X’s speed lock.
*F12-D*::         Swap between mounted CD images.
*F12-O*::         Swap between mounted floppy images.
*F12-P*::         Take a screenshot of the current screen in PNG format.
*F12-I*::         Start/Stop capturing an AVI video of the current session.
*F12-W*::         Start/Stop recording a WAV audio of the current session.  Alt+Pause Start DOSBox-X’s Debugger.
*F12-[,]*::       Select the previous save slot to save to or load from.
*F12-[.]*::       Select the next save slot to save to or load from.
*F12-S*::         Save current state to the selected save slot.
*F12-L*::         Load the state from the selected save slot.
*F12-Pause*::     Pause emulation (press again to continue).
*Ctrl+F5*::       Copy all text on the DOS screen to the host clipboard.
*Ctrl+F6*::       Paste the text in the host clipboard to the DOS screen.
*Ctrl+F9*::       Exit DOSBox-X.
*Ctrl+F10*::      Capture the mouse for use with the emulated DOS.

These are the default keybindings. They can be changed in the keymapper.

Saved/recorded files can be found in current_directory/capture (can be changed in the configfile).
The directory has to exist prior to starting dosbox-x else nothing gets saved or recorded!

NOTE:  Once you increase your dosbox-x cycles beyond your computer's maximum capacity, it will produce the same effect as slowing down the emulation.
This maximum will vary from computer to computer, there is no standard.

== ENVIRONMENT
Any configuration option can be overridden using an environment variable.
Environment variables starting with prefix *DOSBOX* are processed and interpreted as follows: *DOSBOX_SECTIONNAME_PROPERTYNAME=value*

For example, you can override the render aspect this way:

*$ DOSBOX_RENDER_ASPECT=false dosbox-x*

== BUGS
To report a bug, please visit https://github.com/joncampbell123/dosbox-x/issues

== Resources
*project web site:* https://dosbox-x.com

*Project Wiki:* https://dosbox-x.com/wiki
