Provided by: chocolate-doom_3.1.0-1_amd64 
NAME
chocolate-doom - historically compatible Doom engine
SYNOPSIS
chocolate-doom [OPTIONS]
DESCRIPTION
Chocolate Doom is a port of Id Software's 1993 game "Doom" that is designed to behave as similar to the
original DOS version of Doom as is possible.
GENERAL OPTIONS
-config <file>
Load main configuration from the specified file, instead of the default.
-devparm
Developer mode. F1 saves a screenshot in the current working directory.
-extraconfig <file>
Load additional configuration from the specified file, instead of the default.
-file <files>
Load the specified PWAD files.
-iwad <file>
Specify an IWAD file to use.
-nomusic
Disable music.
-nomusicpacks
Disable substitution music packs.
-nosfx Disable sound effects.
-nosound
Disable all sound output.
-response <filename>
Load extra command line arguments from the given response file. Arguments read from the file will
be inserted into the command line replacing this argument. A response file can also be loaded
using the abbreviated syntax '@filename.rsp'.
-savedir <directory>
Specify a path from which to load and save games. If the directory does not exist then it will
automatically be created.
-version
Print the program version and exit.
GAME START OPTIONS
-episode <n>
Start playing on episode n (1-4)
-fast Monsters move faster.
-loadgame <s>
Load the game in slot s.
-nomonsters
Disable monsters.
-respawn
Monsters respawn after being killed.
-skill <skill>
Set the game skill, 1-5 (1: easiest, 5: hardest). A skill of 0 disables all monsters.
-turbo <x>
Turbo mode. The player's speed is multiplied by x%. If unspecified, x defaults to 200. Values
are rounded up to 10 and down to 400.
-warp [<x> <y> | <xy>]
Start a game immediately, warping to ExMy (Doom 1) or MAPxy (Doom 2)
DISPLAY OPTIONS
-1 Don't scale up the screen. Implies -window.
-2 Double up the screen to 2x its normal size. Implies -window.
-3 Double up the screen to 3x its normal size. Implies -window.
-display <x>
Specify the display number on which to show the screen.
-fullscreen
Run in fullscreen mode.
-geometry <WxY>
Specify the dimensions of the window. Implies -window.
-height <y>
Specify the screen height, in pixels. Implies -window.
-noblit
Disable blitting the screen.
-nodraw
Disable rendering the screen entirely.
-nograbmouse
Don't grab the mouse when running in windowed mode.
-nomouse
Disable the mouse.
-width <x>
Specify the screen width, in pixels. Implies -window.
-window
Run in a window.
NETWORKING OPTIONS
-altdeath
Start a deathmatch 2.0 game. Weapons do not stay in place and all items respawn after 30 seconds.
-autojoin
Automatically search the local LAN for a multiplayer server and join it.
-avg Austin Virtual Gaming: end levels after 20 minutes.
-connect <address>
Connect to a multiplayer server running on the given address.
-deathmatch
Start a deathmatch game.
-dedicated
Start a dedicated server, routing packets but not participating in the game itself.
-dup <n>
Reduce the resolution of the game by a factor of n, reducing the amount of network bandwidth
needed.
-extratics <n>
Send n extra tics in every packet as insurance against dropped packets.
-left Run as the left screen in three screen mode.
-localsearch
Search the local LAN for running servers.
-nodes <n>
Autostart the netgame when n nodes (clients) have joined the server.
-oldsync
Use original network client sync code rather than the improved sync code.
-port <n>
Use the specified UDP port for communications, instead of the default (2342).
-privateserver
When running a server, don't register with the global master server. Implies -server.
-query <address>
Query the status of the server running on the given IP address.
-right Run as the right screen in three screen mode.
-search
Query the Internet master server for a global list of active servers.
-server
Start a multiplayer server, listening for connections.
-servername <name>
When starting a network server, specify a name for the server.
-solo-net
Start the game playing as though in a netgame with a single player. This can also be used to play
back single player netgame demos.
-timer <n>
For multiplayer games: exit each level after n minutes.
DEHACKED AND WAD MERGING
-aa <files>
Equivalent to "-af <files> -as <files>".
-af <files>
Simulates the behavior of NWT's -af option, merging flats into the main IWAD directory. Multiple
files may be specified.
-as <files>
Simulates the behavior of NWT's -as option, merging sprites into the main IWAD directory.
Multiple files may be specified.
-deh <files>
Load the given dehacked patch(es)
-dehlump
Load Dehacked patches from DEHACKED lumps contained in one of the loaded PWAD files.
-merge <files>
Simulates the behavior of deutex's -merge option, merging a PWAD into the main IWAD. Multiple
files may be specified.
-noautoload
Disable auto-loading of .wad and .deh files.
-nocheats
Ignore cheats in dehacked files.
-nodeh Disable automatic loading of Dehacked patches for certain IWAD files.
-nwtmerge <files>
Simulates the behavior of NWT's -merge option. Multiple files may be specified.
DEMO OPTIONS
-longtics
Record a high resolution "Doom 1.91" demo.
-maxdemo <size>
Specify the demo buffer size (KiB)
-playdemo <demo>
Play back the demo named demo.lmp.
-record <x>
Record a demo named x.lmp.
-shorttics
Play with low turning resolution to emulate demo recording.
-strictdemos
When recording or playing back demos, disable any extensions of the vanilla demo format - record
demos as vanilla would do, and play back demos as vanilla would do.
-timedemo <demo>
Play back the demo named demo.lmp, determining the framerate of the screen.
COMPATIBILITY
-donut <x> <y>
Use the specified magic values when emulating behavior caused by memory overruns from improperly
constructed donuts. In Vanilla Doom this can differ depending on the operating system. The
default (if this option is not specified) is to emulate the behavior when running under Windows
98.
-gameversion <version>
Emulate a specific version of Doom. Valid values are "1.2", "1.666", "1.7", "1.8", "1.9",
"ultimate", "final", "final2", "hacx" and "chex".
-pack <pack>
Explicitly specify a Doom II "mission pack" to run as, instead of detecting it based on the
filename. Valid values are: "doom2", "tnt" and "plutonia".
-setmem <version>
Specify DOS version to emulate for NULL pointer dereference emulation. Supported versions are:
dos622, dos71, dosbox. The default is to emulate DOS 7.1 (Windows 98).
-spechit <n>
Use the specified magic value when emulating spechit overruns.
-statdump <filename>
Dump statistics information to the specified file on the levels that were played. The output from
this option matches the output from statdump.exe (see ctrlapi.zip in the /idgames archive).
OBSCURE AND LESS-USED OPTIONS
-cdrom [windows only] Save configuration data and savegames in c:\doomdata, allowing play from CD.
-dumpsubstconfig <filename>
Read all MIDI files from loaded WAD files, dump an example substitution music config file to the
specified filename and quit.
-mb <mb>
Specify the heap size, in MiB.
-mmap Use the OS's virtual memory subsystem to map WAD files directly into memory.
-nogui If specified, don't show a GUI window for error messages when the game exits with an error.
IWAD SEARCH PATHS
To play, an IWAD file is needed. This is a large file containing all of the levels, graphics, sound
effects, music and other material that make up the game. IWAD files are named according to the game; the
standard names are:
doom.wad, doom1.wad, doom2.wad, tnt.wad, plutonia.wad
Doom, Doom II, Final Doom
heretic.wad, heretic1.wad, hexen.wad, strife1.wad
Heretic, Hexen and Strife (commercial Doom engine games).
hacx.wad, chex.wad
Hacx and Chex Quest - more obscure games based on the Doom engine.
freedm.wad, freedoom1.wad, freedoom2.wad
The Freedoom open content IWAD files.
The following directory paths are searched in order to find an IWAD:
Current working directory
Any IWAD files found in the current working directory will be used in preference to IWADs found in
any other directories.
DOOMWADDIR
This environment variable can be set to contain a path to a single directory in which to look for
IWAD files. This environment variable is supported by most Doom source ports.
DOOMWADPATH
This environment variable, if set, can contain a colon-separated list of directories in which to
look for IWAD files, or alternatively full paths to specific IWAD files.
$HOME/.local/share/games/doom
Writeable directory in the user's home directory. The path can be overridden using the
XDG_DATA_HOME environment variable (see the XDG Base Directory Specification).
/usr/local/share/doom, /usr/local/share/games/doom, /usr/share/doom,
/usr/share/games/doom System-wide locations that can be accessed by all users. The path
/usr/share/games/doom is a standard path that is supported by most Doom source ports. These paths
can be overridden using the XDG_DATA_DIRS environment variable (see the XDG Base Directory
Specification).
The above can be overridden on a one-time basis by using the -iwad command line parameter to provide the
path to an IWAD file to use. This parameter can also be used to specify the name of a particular IWAD to
use from one of the above paths. For example, '-iwad doom.wad' will search the above paths for the file
doom.wad to use.
ENVIRONMENT
This section describes environment variables that control Chocolate Doom's behavior.
DOOMWADDIR, DOOMWADPATH
See the section, IWAD SEARCH PATHS above.
PCSOUND_DRIVER
When running in PC speaker sound effect mode, this environment variable specifies a PC speaker
driver to use for sound effect playback. Valid options are "Linux" for the Linux console mode
driver, "BSD" for the NetBSD/OpenBSD PC speaker driver, and "SDL" for SDL-based emulated PC
speaker playback (using the digital output).
OPL_DRIVER
When using OPL MIDI playback, this environment variable specifies an OPL backend driver to use.
Valid options are "SDL" for an SDL-based software emulated OPL chip, "Linux" for the Linux
hardware OPL driver, and "OpenBSD" for the OpenBSD/NetBSD hardware OPL driver.
Generally speaking, a real hardware OPL chip sounds better than software emulation; however,
modern machines do not often include one. If present, it may still require extra work to set up
and elevated security privileges to access.
FILES
$HOME/.local/share/chocolate-doom/default.cfg
The main configuration file for Chocolate Doom. See default.cfg(5).
$HOME/.local/share/chocolate-doom/chocolate-doom.cfg
Extra configuration values that are specific to Chocolate Doom and not present in Vanilla Doom.
See chocolate-doom.cfg(5).
SEE ALSO
chocolate-server(6), chocolate-setup(6), chocolate-heretic(6), chocolate-hexen(6), chocolate-strife(6)
AUTHOR
Chocolate Doom is written and maintained by Simon Howard. It is based on the LinuxDoom source code,
released by Id Software.
COPYRIGHT
Copyright © id Software Inc. Copyright © 2005-2016 Simon Howard.
This is free software. You may redistribute copies of it under the terms of the GNU General Public
License <http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the extent permitted by law.
chocolate-doom(6)