== Command line parameters ==

This is a list of the command line parameters supported by Chocolate Doom.
A number of additional parameters are supported in addition to those
present in Vanilla Doom.

=== General options ===

  -cdrom                  Save configuration data and savegames in 
                          c:\doomdata, allowing play from CD. (windows 
                          only) 

  -config <file>          Load configuration from the specified file, 
                          instead of default.cfg.  

  -devparm                Developer mode. F1 saves a screenshot in the 
                          current working directory.  

  -episode <n>            Start playing on episode n (1-4)  

  -extraconfig <file>     Load extra configuration from the specified 
                          file, instead of chocolate-doom.cfg.  

  -fast                   Monsters move faster.  

  -file <files>           Load the specified PWAD files.  

  -iwad <file>            Specify an IWAD file to use.  

  -loadgame <s>           Load the game in slot s.  

  -mb <mb>                Specify the heap size, in MiB (default 16).  

  -mmap                   Use the OS's virtual memory subsystem to map WAD 
                          files directly into memory.  

  -noblit                 Disable blitting the screen.  

  -nodraw                 Disable rendering the screen entirely.  

  -nomonsters             Disable monsters.  

  -nomusic                Disable music.  

  -nosfx                  Disable sound effects.  

  -nosound                Disable all sound output.  

  -respawn                Monsters respawn after being killed.  

  -servername <name>      When starting a network server, specify a name 
                          for the server.  

  -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)

=== 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 "1.9", "ultimate", "final", "final2", "hacx" 
                          and "chex".  

  -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.

=== 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.  

  -timedemo <demo>  Play back the demo named demo.lmp, determining the 
                    framerate of the screen.

=== Display options ===

  -1               Don't scale up the screen.  

  -2               Double up the screen to 2x its normal size.  

  -3               Double up the screen to 3x its normal size.  

  -8in32           Set the color depth of the screen to 32 bits per pixel. 
                    

  -bpp <bpp>       Specify the color depth of the screen, in bits per 
                   pixel.  

  -fullscreen      Run in fullscreen mode.  

  -gdi             Use the Windows GDI driver instead of DirectX. (windows 
                   only) 

  -geometry <WxY>  Specify the screen mode (when running fullscreen) or 
                   the window dimensions (when running in windowed mode).  

  -grabmouse       Grab the mouse when running in windowed mode.  

  -height <y>      Specify the screen height, in pixels.  

  -nograbmouse     Don't grab the mouse when running in windowed mode.  

  -nomouse         Disable the mouse.  

  -nonovert        Enable vertical mouse movement.  

  -novert          Disable vertical mouse movement.  

  -width <x>       Specify the screen width, in pixels.  

  -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.  

  -ignoreversion      When running a netgame server, ignore version 
                      mismatches between the server and the client. Using 
                      this option may cause game desyncs to occur, or 
                      differences in protocol may mean the netgame will 
                      simply not function at all.  

  -left               Run as the left screen in three screen mode.  

  -localsearch        Search the local LAN for running servers.  

  -oldsync            Use original game 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.  

  -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)  

  -merge <files>     Simulates the behavior of deutex's -merge option, 
                     merging a PWAD into the main IWAD. Multiple files may 
                     be specified.  

  -nocheats          Ignore cheats in dehacked files.  

  -nwtmerge <files>  Simulates the behavior of NWT's -merge option. 
                     Multiple files may be specified.