Viewing File: <root>/docs/config.txt

    1  This file describes general usage information about MAME. It is intended
    2  to cover aspects of using and configuring the program that are common
    3  across operating systems. For additional OS-specific options, please see
    4  the separate documentation for your particular version of MAME.
    5  
    6  
    7  
    8  Using the program
    9  -----------------
   10  
   11  The usual way to run MAME is by telling it to run a particular game:
   12  
   13      mame <gamename> [options]
   14  
   15  For example:
   16  
   17      mame robby -nosound
   18  
   19  ...will run Robby Roto without sound. There are many, many options
   20  available. All commonly supported options are listed below. Options that
   21  are specific to one operating system or version of MAME will be listed
   22  in a separate document.
   23  
   24  An alternative way to run MAME is to give it a command:
   25  
   26      mame <command> [parameters]
   27  
   28  For example:
   29  
   30      mame -listsource gridlee
   31  
   32  ...will print the name of the source file where the gridlee driver lives
   33  to the screen. There are just a handful of these commands in MAME. They
   34  are all listed below, just before the options list.
   35  
   36  
   37  
   38  Default Keys
   39  ------------
   40  
   41  All the keys below are fully configurable in the user interface. This list
   42  shows the standard keyboard configuration.
   43  
   44  Tab       Toggles the configuration menu.
   45  
   46  ~         Toggles the On Screen Display. When the on-screen display is
   47            visible, you can use the following keys to control it:
   48  
   49               Up - select previous parameter to modify
   50               Down - select next parameter to modify
   51               Enter - reset parameter value to its default
   52  
   53               Left - decrease the value of the selected parameter
   54               Control+Left - decrease the value by 10x
   55               Shift+Left - decrease the value by 0.1x
   56               Alt+Left - decrease the value by the smallest amount
   57  
   58               Right - increase the value of the selected parameter
   59               Control+Right - increase the value by 10x
   60               Shift+Right - increase the value by 0.1x
   61               Alt+Right - increase the value by the smallest amount
   62  
   63  P         Pauses the game.
   64  
   65  Shift+P   While paused, advances to next frame.
   66  
   67  F2        Service Mode for games that support it.
   68  
   69  F3        Resets the game.
   70  
   71  Shift+F3  Performs a "hard reset", which tears everything down and re-
   72            creates it from scratch. This is a more thorough and complete
   73            reset than an F3.
   74  
   75  F4        Shows the game palette, decoded GFX, and any tilemaps. Use the
   76            Enter key to switch between the three modes (palette, graphics,
   77            and tilemaps). Press F4 again to turn off the display. The key
   78            controls in each mode vary slightly:
   79  
   80               * Palette/colortable mode:
   81                  [ ] - switch between palette and colortable modes
   82                  Up/Down - scroll up/down one line at a time
   83                  Page Up/Page Down - scroll up/down one page at a time
   84                  Home/End - move to top/bottom of list
   85                  -/+ - increase/decrease the number of colors per row
   86                  Enter - switch to graphics viewer
   87  
   88               * Graphics mode:
   89                  [ ] - switch between different graphics sets
   90                  Up/Down - scroll up/down one line at a time
   91                  Page Up/Page Down - scroll up/down one page at a time
   92                  Home/End - move to top/bottom of list
   93                  Left/Right - change color displayed
   94                  R - rotate tiles 90 degrees clockwise
   95                  -/+ - increase/decrease the number of tiles per row
   96                  Enter - switch to tilemap viewer
   97  
   98               * Tilemap mode:
   99                  [ ] - switch between different tilemaps
  100                  Up/Down/Left/Right - scroll 8 pixels at a time
  101                  Shift+Up/Down/Left/Right - scroll 1 pixel at a time
  102                  Control+Up/Down/Left/Right - scroll 64 pixels at a time
  103                  R - rotate tilemap view 90 degrees clockwise
  104                  -/+ - increase/decrease the zoom factor
  105                  Enter - switch to palette/colortable mode
  106  
  107            Note: Not all games have decoded graphics and/or tilemaps.
  108  
  109  F6        Toggle cheat mode (if started with "-cheat").
  110  
  111  F7        Load a save state. You will be requested to press a key to
  112            determine which save state you wish to load. Note that the save
  113            state feature is not supported for a large number of drivers. If
  114            support is not enabled for a given driver, you will receive a
  115            warning when attempting to save or load.
  116  
  117  Shift+F7  Create a save state. Requires an additional keypress to identify
  118            the state, similar to the load option above.
  119  
  120  F8        Decrease frame skip on the fly.
  121  
  122  F9        Increase frame skip on the fly.
  123  
  124  F10       Toggle speed throttling.
  125  
  126  F11       Toggles speed display.
  127  
  128  Shift+F11 Toggles internal profiler display (if compiled in).
  129  
  130  F12       Saves a screen snapshot.
  131  
  132  Insert    Fast forward. While held, runs the game with throttling disabled
  133            and with the maximum frameskip.
  134  
  135  Escape    Exits emulator.
  136  
  137  
  138  
  139  
  140  Core commands
  141  -------------
  142  
  143  -help / -h / -?
  144  
  145      Displays current MAME version and copyright notice.
  146  
  147  -validate / -valid
  148  
  149      Performs internal validation on every driver in the system. Run this
  150      before submitting changes to ensure that you haven't violated any of
  151      the core system rules.
  152  
  153  
  154  
  155  Configuration commands
  156  ----------------------
  157  
  158  -createconfig / -cc
  159  
  160      Creates the default mame.ini file. All the configuration options
  161      (not commands) described below can be permanently changed by editing
  162      this configuration file.
  163  
  164  -showconfig / -sc
  165  
  166      Displays the current configuration settings. If you route this to a
  167      file, you can use it as an INI file. For example, the command:
  168  
  169          mame -showconfig >mame.ini
  170  
  171      is equivalent to -createconfig.
  172  
  173  -showusage / -su
  174  
  175      Displays a summary of all the command line options. For options that
  176      are not mentioned here, the short summary given by "mame -showusage"
  177      is usually sufficient.
  178  
  179  
  180  
  181  Frontend commands
  182  -----------------
  183  
  184  Note: By default, all the '-list' commands below write info to the screen.
  185  If you wish to write the info to a textfile instead, add this to the end
  186  of your command:
  187  
  188    > filename
  189  
  190  ...where 'filename' is the textfile's path and name
  191  (e.g., c:\mame\list.txt).
  192  
  193  -listxml / -lx [<gamename|wildcard>]
  194  
  195      List comprehensive details for all of the supported games. The output
  196      is quite long, so it is usually better to redirect this into a file.
  197      The output is in XML format. By default all games are listed; however,
  198      you can limit this list by specifying a driver name or wildcard after
  199      the -listxml command.
  200  
  201  -listfull / -ll [<gamename|wildcard>]
  202  
  203      Displays a list of game driver names and descriptions. By default all
  204      games are listed; however, you can limit this list by specifying a
  205      driver name or wildcard after the -listfull command.
  206  
  207  -listsource / -ls [<gamename|wildcard>]
  208  
  209      Displays a list of drivers and the names of the source files their
  210      game drivers live in. Useful for finding which driver a game runs on
  211      in order to fix bugs. By default all games are listed; however, you
  212      can limit this list by specifying a driver name or wildcard after
  213      the -listsource command.
  214  
  215  -listclones / -lc [<gamename|wildcard>]
  216  
  217      Displays a list of clones. By default all clones are listed; however,
  218      you can limit this list by specifying a driver name or wildcard after
  219      the -listsource command.
  220  
  221  -listbrothers / -lb [<gamename|wildcard>]
  222  
  223          Displays a list of 'brothers', or rather, other sets which are located
  224          in the same sourcefile as the gamename searched for.
  225  
  226  -listcrc [<gamename|wildcard>]
  227  
  228      Displays a full list of CRCs of all ROM images referenced by all
  229      drivers within MAME.
  230  
  231  -listroms [<gamename|wildcard>]
  232  
  233      Displays a list of ROM images referenced by the specified game.
  234  
  235  -listsamples [<gamename|wildcard>]
  236  
  237      Displays a list of samples referenced by the specified game.
  238  
  239  -verifyroms [<gamename|wildcard>]
  240  
  241      Checks for invalid or missing ROM images. By default all drivers that
  242      have valid ZIP files or directories in the rompath are verified;
  243      however, you can limit this list by specifying a driver name or
  244      wildcard after the -verifyroms command.
  245  
  246  -verifysamples [<gamename|wildcard>]
  247  
  248      Checks for invalid or missing samples. By default all drivers that
  249      have valid ZIP files or directories in the samplepath are verified;
  250      however, you can limit this list by specifying a driver name or
  251      wildcard after the -verifyroms command.
  252  
  253  -romident [path\to\romstocheck.zip]
  254  
  255      Attempts to identify ROM files, if they are known to MAME, in the
  256      specified .zip file or directory. This command can be used to try and
  257      identify ROM sets taken from unknown boards. On exit, the errorlevel
  258      is returned as one of the following:
  259  
  260          0: means all files were identified
  261          7: means all files were identified except for 1 or more "non-ROM"
  262              files
  263          8: means some files were identified
  264          9: means no files were identified
  265  
  266  -listdevices / -ld [<gamename|wildcard>]
  267  
  268          Displays a list of all devices known to be hooked up to a game.  The ":"
  269          is considered the game itself with the devices list being attached to give
  270          the user a better understanding of what the emulation is using.
  271   
  272  -listslots [<gamename|wildcard>]
  273  
  274          Show available slots and options for each slot (if available).  Primarily
  275          used for MESS to allow control over internal plug-in cards, much like PC's
  276          needing video, sound and other cards.
  277           
  278  -listmedia / -lm [<gamename|wildcard>]
  279     
  280          List available media that the chosen game or system allows to be used.  This
  281          includes media types (cartridge, cassette, diskette and more) as well as
  282          common file extentions which are supported.
  283  
  284  -listsoftware [<gamename|wildcard>]
  285    
  286          Posts to screen all software lists which can be used by the entered gamename
  287          or system.  Notice, this is simply a copy/paste of the .XML file which reside
  288          in the HASH folder which are allowed to be used.
  289  
  290  -getsoftlist [<gamename|wildcard>]
  291  
  292          Posts to screen a specific software list which matches with the gamename
  293          provided.
  294   
  295          
  296  
  297  Configuration options
  298  ---------------------
  299  
  300  -[no]readconfig / -[no]rc
  301  
  302      Enables or disables the reading of the config files. When enabled
  303      (which is the default), MAME reads the following config files in order:
  304  
  305          - mame.ini
  306          - <mymame>.ini   (i.e. if MAME was renamed mame060.exe, MAME
  307                    parses mame060.ini here)
  308          - debug.ini      (if the debugger is enabled)
  309          - <parent>.ini   (for clones only, may be called recursively)
  310          - <gamename>.ini
  311                  - vertical.ini   (for games with vertical monitor orientation)
  312                  - horizont.ini   (for games with horizontal monitor orientation)
  313          - vector.ini     (for vector games only)
  314          - <driver>.ini   (based on the source filename of the driver)
  315  
  316  
  317      The settings in the later ini's override those in the earlier ini's.
  318      So, for example, if you wanted to disable overlay effects in the
  319      vector games, you can create a vector.ini with the "effect none" line
  320      in it, and it will override whatever effect value you have in your
  321      mame.ini. The default is ON (-readconfig).
  322  
  323  
  324  
  325  Core search path options
  326  ------------------------
  327  
  328  -rompath / -rp <path>
  329  
  330      Specifies a list of paths within which to find ROM or hard disk images.
  331      Multiple paths can be specified by separating them with semicolons.
  332      The default is 'roms' (that is, a directory "roms" in the same directory
  333      as the MAME executable).
  334  
  335  -samplepath / -sp <path>
  336  
  337      Specifies a list of paths within which to find sample files. Multiple
  338      paths can be specified by separating them with semicolons. The default
  339      is 'samples' (that is, a directory "samples" in the same directory as
  340      the MAME executable).
  341  
  342  -artpath <path> / -artwork_directory <path>
  343  
  344      Specifies a list of paths within which to find artwork files. Multiple
  345      paths can be specified by separating them with semicolons. The default
  346      is 'artwork' (that is, a directory "artwork" in the same directory as
  347      the MAME executable).
  348  
  349  -ctrlrpath / -ctrlr_directory <path>
  350  
  351      Specifies a list of paths within which to find controller-specific
  352      configuration files. Multiple paths can be specified by separating
  353      them with semicolons. The default is 'ctrlr' (that is, a directory
  354      "ctrlr" in the same directory as the MAME executable).
  355  
  356  -inipath <path>
  357  
  358      Specifies a list of paths within which to find .INI files. Multiple
  359      paths can be specified by separating them with semicolons. The default
  360      is '.;ini' (that is, search in the current directory first, and then
  361      in the directory "ini" in the same directory as the MAME executable).
  362  
  363  -fontpath <path>
  364  
  365      Specifies a list of paths within which to find .BDF font files. Multiple
  366      paths can be specified by separating them with semicolons. The default
  367      is '.' (that is, search in the same directory as the MAME executable).
  368  
  369  -cheatpath <path>
  370  
  371          Specifies a list of paths within which to find .XML cheat files.
  372          Multiple paths can be specified by separating them with semicolons. The
  373          default is 'cheat' (that is, a folder called 'cheat' located in the same
  374          directory as the as the MAME executable).
  375  
  376  -crosshairpath <path>
  377  
  378      Specifies a list of paths within which to find crosshair files. Multiple
  379      paths can be specified by separating them with semicolons. The default
  380      is 'crsshair' (that is, a directory "crsshair" in the same directory as
  381      the MAME executable).  If the Crosshair is set to default in the menu,
  382      MAME will look for gamename\cross#.png and then cross#.png in the
  383      specified crsshairpath, where # is the player number.  Failing that,
  384      MAME will use built-in default crosshairs.
  385  
  386  
  387  Core Output Directory Options
  388  -----------------------------
  389  
  390  -cfg_directory <path>
  391  
  392      Specifies a single directory where configuration files are stored.
  393      Configuration files store user configurable settings that are read at
  394      startup and written when MAME exits. The default is 'cfg' (that is,
  395      a directory "cfg" in the same directory as the MAME executable). If
  396      this directory does not exist, it will be automatically created.
  397  
  398  -nvram_directory <path>
  399  
  400      Specifies a single directory where NVRAM files are stored. NVRAM files
  401      store the contents of EEPROM and non-volatile RAM (NVRAM) for games
  402      which used this type of hardware. This data is read at startup and
  403      written when MAME exits. The default is 'nvram' (that is, a directory
  404      "nvram" in the same directory as the MAME executable). If this
  405      directory does not exist, it will be automatically created.
  406  
  407  -memcard_directory <path>
  408  
  409      Specifies a single directory where memory card files are stored.
  410      Memory card files store the contents of removable memory cards for
  411      games which used this type of hardware. This data is read and written
  412      under control of the user via the "Memory Card" menu in the user
  413      interface. The default is 'memcard' (that is, a directory "memcard"
  414      in the same directory as the MAME executable). If this directory does
  415      not exist, it will be automatically created.
  416  
  417  -input_directory <path>
  418  
  419      Specifies a single directory where input recording files are stored.
  420      Input recordings are created via the -record option and played back
  421      via the -playback option. The default is 'inp' (that is, a directory
  422      "inp" in the same directory as the MAME executable). If this directory
  423      does not exist, it will be automatically created.
  424  
  425  -state_directory <path>
  426  
  427      Specifies a single directory where save state files are stored. Save
  428      state files are read and written either upon user request, or when
  429      using the -autosave option. The default is 'sta' (that is, a directory
  430      "sta" in the same directory as the MAME executable). If this directory
  431      does not exist, it will be automatically created.
  432  
  433  -snapshot_directory <path>
  434  
  435      Specifies a single directory where screen snapshots are stored, when
  436      requested by the user. The default is 'snap' (that is, a directory
  437      "snap" in the same directory as the MAME executable). If this
  438      directory does not exist, it will be automatically created.
  439  
  440  -diff_directory <path>
  441  
  442      Specifies a single directory where hard drive differencing files are
  443      stored. Hard drive differencing files store any data that is written
  444      back to a hard disk image, in order to preserve the original image.
  445      The differencing files are created at startup when a game with a hard
  446      disk image. The default is 'diff' (that is, a directory "diff" in the
  447      same directory as the MAME executable). If this directory does not
  448      exist, it will be automatically created.
  449  
  450  -comment_directory <path>
  451  
  452      Specifies a single directory where debugger comment files are stored.
  453      Debugger comment files are written by the debugger when comments are
  454      added to the disassembly for a game. The default is 'comments' (that
  455      is, a directory "comments" in the same directory as the MAME
  456      executable). If this directory does not exist, it will be
  457      automatically created.
  458  
  459  
  460  
  461  Core state/playback options
  462  ---------------------------
  463  
  464  -state <slot>
  465  
  466      Immediately after starting the specified game, will cause the save
  467      state in the specified <slot> to be loaded.
  468  
  469  -[no]autosave
  470  
  471      When enabled, automatically creates a save state file when exiting
  472      MAME and automatically attempts to reload it when later starting MAME
  473      with the same game. This only works for games that have explicitly
  474      enabled save state support in their driver. The default is OFF
  475      (-noautosave).
  476  
  477  -playback / -pb <filename>
  478  
  479      Specifies a file from which to play back a series of game inputs. This
  480      feature does not work reliably for all games, but can be used to watch
  481      a previously recorded game session from start to finish. In order to
  482      make things consistent, you should only record and playback with all
  483      configuration (.cfg), NVRAM (.nv), and memory card files deleted. The
  484      default is NULL (no playback).
  485  
  486  -record / -rec <filename>
  487  
  488      Specifies a file to record all input from a game session. This can be
  489      used to record a game session for later playback. This feature does
  490      not work reliably for all games, but can be used to watch a previously
  491      recorded game session from start to finish. In order to make things
  492      consistent, you should only record and playback with all configuration
  493      (.cfg), NVRAM (.nv), and memory card files deleted. The default is
  494      NULL (no recording).
  495  
  496  -mngwrite <filename>
  497  
  498      Writes each video frame to the given <filename> in MNG format,
  499      producing an animation of the game session. Note that -mngwrite only
  500      writes video frames; it does not save any audio data. Use -wavwrite
  501      for that, and reassemble the audio/video using offline tools. The
  502      default is NULL (no recording).
  503  
  504  -aviwrite <filename>
  505  
  506      Stream video and sound data to the given <filename> in AVI format,
  507      producing an animation of the game session complete with sound. The
  508      default is NULL (no recording).
  509  
  510  -wavwrite <filename>
  511  
  512      Writes the final mixer output to the given <filename> in WAV format,
  513      producing an audio recording of the game session. The default is
  514      NULL (no recording).
  515  
  516  -snapname <name>
  517  
  518      Describes how MAME should name files for snapshots. <name> is a string
  519      that provides a template that is used to generate a filename. Three
  520      simple substitutions are provided: the / character represents the
  521      path separator on any target platform (even Windows); the string %g
  522      represents the driver name of the current game; and the string %i
  523      represents an incrementing index. If %i is omitted, then each
  524      snapshot taken will overwrite the previous one; otherwise, MAME will
  525      find the next empty value for %i and use that for a filename. The
  526      default is %g/%i, which creates a separate folder for each game,
  527      and names the snapshots under it starting with 0000 and increasing
  528      from there.  In the case of using different media, you can use the
  529          %d_[media] indicator.  Replace [media] with the default media being
  530          used.  In the example: 'mess nes megaman2u -snapname %g/%d_cart'
  531          snapshots will then be placed in 'snaps\nes\megaman2u.png'
  532  
  533  -snapsize <width>x<height>
  534  
  535      Hard-codes the size for snapshots and movie recording. By default,
  536      MAME will create snapshots at the game's current resolution in raw
  537      pixels, and will create movies at the game's starting resolution in
  538      raw pixels. If you specify this option, then MAME will create both
  539      snapshots and movies at the size specified, and will bilinear filter
  540      the result. Note that this size does not automatically rotate if the
  541      game is vertically oriented. The default is 'auto'.
  542  
  543  -snapview <viewname>
  544  
  545      Specifies the view to use when rendering snapshots and movies. By
  546      default, both use a special 'internal' view, which renders a separate
  547      snapshot per screen or renders movies only of the first screen. By
  548      specifying this option, you can override this default behavior and
  549      select a single view that will apply to all snapshots and movies.
  550      Note that <viewname> does not need to be a perfect match; rather, it
  551      will select the first view whose name matches all the characters
  552      specified by <viewname>. For example, -snapview native will match the
  553      "Native (15:14)" view even though it is not a perfect match.
  554      <viewname> can also be 'auto', which selects the first view with all
  555      screens present. The default value is 'internal'.
  556  
  557  -[no]burnin
  558  
  559      Tracks brightness of the screen during play and at the end of 
  560      emulation generates a PNG that can be used to simulate burn-in
  561      effects on other games. The resulting PNG is created such that the
  562      least used-areas of the screen are fully white (since burned-in areas 
  563      are darker, all other areas of the screen must be lightened a touch).
  564      The intention is that this PNG can be loaded via an artwork file with
  565      a low alpha (e.g, 0.1-0.2 seems to work well) and blended over the
  566      entire screen. The PNG files are saved in the snap directory under 
  567      the gamename/burnin-<screen.name>.png. The default is OFF (-noburnin).
  568  
  569  
  570  
  571  Core performance options
  572  ------------------------
  573  
  574  -[no]autoframeskip / -[no]afs
  575  
  576      Automatically determines the frameskip level while you're playing the
  577      game, adjusting it constantly in a frantic attempt to keep the game
  578      running at full speed. Turning this on overrides the value you have
  579      set for -frameskip below. The default is OFF (-noautoframeskip).
  580  
  581  -frameskip / -fs <level>
  582  
  583      Specifies the frameskip value. This is the number of frames out of
  584      every 12 to drop when running. For example, if you say -frameskip 2,
  585      then MAME will display 10 out of every 12 frames. By skipping those
  586      frames, you may be able to get full speed in a game that requires more
  587      horsepower than your computer has. The default value is -frameskip 0,
  588      which skips no frames.
  589  
  590  -seconds_to_run / -str <seconds>
  591  
  592      This option can be used for benchmarking and automated testing. It tells
  593      MAME to stop execution after a fixed number of seconds. By combining
  594      this with a fixed set of other command line options, you can set up a
  595      consistent environment for benchmarking MAME performance. In addition,
  596      upon exit, the -str option will write a screenshot called final.png
  597      to the game's snapshot directory.
  598  
  599  -[no]throttle
  600  
  601      Configures the default thottling setting. When throttling is on, MAME
  602      attempts to keep the game running at the game's intended speed. When
  603      throttling is off, MAME runs the game as fast as it can. Note that the
  604      fastest speed is more often than not limited by your graphics card,
  605      especially for older games. The default is ON (-throttle).
  606  
  607  -[no]sleep
  608  
  609      Allows MAME to give time back to the system when running with -throttle.
  610      This allows other programs to have some CPU time, assuming that the
  611      game isn't taxing 100% of your CPU resources. This option can
  612      potentially cause hiccups in performance if other demanding programs
  613      are running. The default is ON (-sleep).
  614  
  615  -speed <factor>
  616  
  617      Changes the way MAME throttles gameplay such that the game runs at some
  618      multiplier of the original speed. A <factor> of 1.0 means to run the
  619      game at its normal speed. A <factor> of 0.5 means run at half speed,
  620      and a <factor> of 2.0 means run at 2x speed. Note that changing this
  621      value affects sound playback as well, which will scale in pitch
  622      accordingly. The internal resolution of the fraction is two decimal
  623      places, so a value of 1.002 is the same as 1.0. The default is 1.0.
  624  
  625  -[no]refreshspeed / -[no]rs
  626  
  627      Allows MAME to dynamically adjust the gameplay speed such that it does
  628      not exceed the slowest refresh rate for any targeted monitors in your
  629      system. Thus, if you have a 60Hz monitor and run a game that is
  630      actually designed to run at 60.6Hz, MAME will dynamically change the
  631      speed down to 99% in order to prevent sound hiccups or other
  632      undesirable side effects of running at a slower refresh rate. The
  633      default is OFF (-norefreshspeed).
  634  
  635  
  636  
  637  Core rotation options
  638  ---------------------
  639  
  640  -[no]rotate
  641  
  642      Rotate the game to match its normal state (horizontal/vertical). This
  643      ensures that both vertically and horizontally oriented games show up
  644      correctly without the need to rotate your monitor. If you want to keep
  645      the game displaying 'raw' on the screen the way it would have in the
  646      arcade, turn this option OFF. The default is ON (-rotate).
  647  
  648  -[no]ror
  649  -[no]rol
  650  
  651      Rotate the game screen to the right (clockwise) or left (counter-
  652      clockwise) relative to either its normal state (if -rotate is
  653      specified) or its native state (if -norotate is specified). The
  654      default for both of these options is OFF (-noror -norol).
  655  
  656  -[no]autoror
  657  -[no]autorol
  658  
  659      These options are designed for use with pivoting screens that only
  660      pivot in a single direction. If your screen only pivots clockwise,
  661      use -autorol to ensure that the game will fill the screen either
  662      horizontally or vertically in one of the directions you can handle.
  663      If your screen only pivots counter-clockwise, use -autoror.
  664  
  665  -[no]flipx
  666  -[no]flipy
  667  
  668      Flip (mirror) the game screen either horizontally (-flipx) or
  669      vertically (-flipy). The flips are applied after the -rotate and
  670      -ror/-rol options are applied. The default for both of these options
  671      is OFF (-noflipx -noflipy).
  672  
  673  
  674  
  675  Core artwork options
  676  --------------------
  677  
  678  -[no]artwork_crop / -[no]artcrop
  679  
  680      Enable cropping of artwork to the game screen area only. This works
  681      best with -video gdi or -video d3d, and means that vertically oriented
  682      games running full screen can display their artwork to the left and
  683      right sides of the screen. This does not work with -video ddraw
  684      because of the way the game screens are rendered and scaled after the
  685      fact. This option can also be controlled via the Video Options menu in
  686      the user interface. The default is OFF (-noartwork_crop).
  687  
  688  -[no]use_backdrops / -[no]backdrop
  689  
  690      Enables/disables the display of backdrops. The default is ON
  691      (-use_backdrops).
  692  
  693  -[no]use_overlays / -[no]overlay
  694  
  695      Enables/disables the display of overlays. The default is ON
  696      (-use_overlays).
  697  
  698  -[no]use_bezels / -[no]bezels
  699  
  700      Enables/disables the display of bezels. The default is ON
  701      (-use_bezels).
  702  
  703  -[no]use_cpanels / -[no]cpanels
  704  
  705      Enables/disables the display of control panels. The default is ON
  706      (-use_cpanels).
  707  
  708  -[no]use_marquees / -[no]marquees
  709  
  710      Enables/disables the display of marquees. The default is ON
  711      (-use_marquees).
  712  
  713  
  714  
  715  Core screen options
  716  -------------------
  717  
  718  -brightness <value>
  719  
  720      Controls the default brightness, or black level, of the game screens.
  721      This option does not affect the artwork or other parts of the display.
  722      Using the MAME UI, you can individually set the brightness for each
  723      game screen; this option controls the initial value for all visible
  724      game screens. The standard value is 1.0. Selecting lower values (down
  725      to 0.1) will produce a darkened display, while selecting higher values
  726      (up to 2.0) will give a brighter display. The default is 1.0.
  727  
  728  -contrast <value>
  729  
  730      Controls the contrast, or white level, of the game screens. This
  731      option does not affect the artwork or other parts of the display.
  732      Using the MAME UI, you can individually set the contrast for each
  733      game screen; this option controls the initial value for all visible
  734      game screens. The standard value is 1.0. Selecting lower values (down
  735      to 0.1) will produce a dimmer display, while selecting higher values
  736      (up to 2.0) will give a more saturated display. The default is 1.0.
  737  
  738  -gamma <value>
  739  
  740      Controls the gamma, which produces a potentially nonlinear black to
  741      white ramp, for the game screens. This option does not affect the
  742      artwork or other parts of the display. Using the MAME UI, you can
  743      individually set the gamma for each game screen; this option controls
  744      the initial value for all visible game screens. The standard value is
  745      1.0, which gives a linear ramp from black to white. Selecting lower
  746      values (down to 0.1) will increase the nonlinearity toward black,
  747      while selecting higher values (up to 3.0) will push the nonlinearity
  748      toward white. The default is 1.0.
  749  
  750  -pause_brightness <value>
  751  
  752      This controls the brightness level when MAME is paused. The default
  753      value is 0.65.
  754  
  755  -effect <filename>
  756  
  757      Specifies a single PNG file that is used as an overlay over any game
  758      screens in the video display. This PNG file is assumed to live in the
  759      root of one of the artpath directories. The pattern in the PNG file is
  760      repeated both horizontally and vertically to cover the entire game
  761      screen areas (but not any external artwork), and is rendered at
  762      the target resolution of the game image. For -video gdi and -video d3d
  763      modes, this means that one pixel in the PNG will map to one pixel on
  764      your output display. For -video ddraw, this means that one pixel in the
  765      PNG will map to one pixel in the prescaled game screen. If you wish to
  766      use an effect that requires mapping n PNG pixels to each game screen
  767      pixel with -video ddraw, you need to specify a -prescale factor of n as
  768      well. The RGB values of each pixel in the PNG are multiplied against the
  769      RGB values of the target screen. The default is 'none', meaning no
  770      effect.
  771  
  772  
  773  
  774  Core vector options
  775  -------------------
  776  
  777  -[no]antialias / -[no]aa
  778  
  779      Enables antialiased line rendering for vector games. The default is ON
  780      (-antialias).
  781  
  782  -beam <width>
  783  
  784      Sets the width of the vectors. This is a scaling factor against the
  785      standard vector width. A value of 1.0 will keep the default vector
  786      line width. Smaller values will reduce the width, and larger values
  787      will increase the width. The default is 1.0.
  788  
  789  -flicker <value>
  790  
  791      Simulates a vector "flicker" effect, similar to a vector monitor that
  792      needs adjustment. This option requires a float argument in the range
  793      of 0.00 - 100.00 (0=none, 100=maximum). The default is 0.
  794  
  795  
  796  
  797  Core sound options
  798  ------------------
  799  
  800  -[no]sound
  801  
  802      Enable or disable sound altogether. The default is ON (-sound).
  803  
  804  -samplerate <value> / -sr <value>
  805  
  806      Sets the audio sample rate. Smaller values (e.g. 11025) cause lower
  807      audio quality but faster emulation speed. Higher values (e.g. 48000)
  808      cause higher audio quality but slower emulation speed. The default is
  809      48000.
  810  
  811  -[no]samples
  812  
  813      Use samples if available. The default is ON (-samples).
  814  
  815  -volume / -vol <value>
  816  
  817      Sets the startup volume. It can later be changed with the user
  818      interface (see Keys section). The volume is an attenuation in dB:
  819      e.g., "-volume -12" will start with -12dB attenuation. The default
  820      is 0.
  821  
  822  
  823  
  824  Core input options
  825  ------------------
  826  
  827  -[no]coin_lockout / -[no]coinlock
  828  
  829      Enables simulation of the "coin lockout" feature that is implmeneted
  830      on a number of game PCBs. It was up to the operator whether or not
  831      the coin lockout outputs were actually connected to the coin
  832      mechanisms. If this feature is enabled, then attempts to enter a coin
  833      while the lockout is active will fail and will display a popup message
  834      in the user interface. If this feature is disabled, the coin lockout
  835      signal will be ignored. The default is ON (-coin_lockout).
  836  
  837  -ctrlr <controller>
  838  
  839      Enables support for special controllers. Configuration files are
  840      loaded from the ctrlrpath. They are in the same format as the .cfg
  841      files that are saved, but only control configuration data is read
  842      from the file. The default is NULL (no controller file).
  843  
  844  -[no]mouse
  845  
  846      Controls whether or not MAME makes use of mouse controllers. When
  847      this is enabled, you will likely be unable to use your mouse for other
  848      purposes until you exit or pause the game. The default is OFF
  849      (-nomouse).
  850  
  851  -[no]joystick / -[no]joy
  852  
  853      Controls whether or not MAME makes use of joystick/gamepad controllers.
  854      When this is enabled, MAME will ask DirectInput about which
  855      controllers are connected. The default is OFF (-nojoystick).
  856  
  857  -[no]lightgun / -[no]gun
  858  
  859      Controls whether or not MAME makes use of lightgun controllers.
  860      Note that most lightguns map to the mouse, so using -lightgun and
  861      -mouse together may produce strange results. The default is OFF
  862      (-nolightgun).
  863  
  864  -[no]multikeyboard / -[no]multikey
  865  
  866      Determines whether MAME differentiates between multiple keyboards.
  867      Some systems may report more than one keyboard; by default, the data
  868      from all of these keyboards is combined so that it looks like a single
  869      keyboard. Turning this option on will enable MAME to report keypresses
  870      on different keyboards independently. The default is OFF
  871      (-nomultikeyboard).
  872  
  873  -[no]multimouse
  874  
  875      Determines whether MAME differentiates between multiple mice. Some
  876      systems may report more than one mouse device; by default, the data
  877      from all of these mice is combined so that it looks like a single
  878      mouse. Turning this option on will enable MAME to report mouse
  879      movement and button presses on different mice independently. The
  880      default is OFF (-nomultimouse).
  881  
  882  -[no]steadykey / -[no]steady
  883  
  884      Some games require two or more buttons to be pressed at exactly the
  885      same time to make special moves. Due to limitations in the keyboard
  886      hardware, it can be difficult or even impossible to accomplish that
  887      using the standard keyboard handling. This option selects a different
  888      handling that makes it easier to register simultaneous button presses,
  889      but has the disadvantage of making controls less responsive. The
  890      default is OFF (-nosteadykey)
  891  
  892  -[no]ui_active
  893  
  894          Enable user interface on top of emulated keyboard (if present).  The
  895          default if OFF (-noui_active)
  896  
  897  -[no]offscreen_reload / -[no]reload
  898  
  899      Controls whether or not MAME treats a second button input from a
  900      lightgun as a reload signal. In this case, MAME will report the gun's
  901      position as (0,MAX) with the trigger held, which is equivalent to an
  902      offscreen reload. This is only needed for games that required you to
  903      shoot offscreen to reload, and then only if your gun does not support
  904      off screen reloads. The default is OFF (-nooffscreen_reload).
  905  
  906  -joystick_map <map> / -joymap <map>
  907  
  908      Controls how joystick values map to digital joystick controls. MAME
  909      accepts all joystick input from the system as analog data. For true
  910      analog joysticks, this needs to be mapped down to the usual 4-way or
  911      8-way digital joystick values. To do this, MAME divides the analog
  912      range into a 9x9 grid. It then takes the joystick axis position (for
  913      X and Y axes only), maps it to this grid, and then looks up a
  914      translation from a joystick map. This parameter allows you to specify
  915      the map. The default is 'auto', which means that a standard 8-way,
  916      4-way, or 4-way diagonal map is selected automatically based on the
  917      input port configuration of the current game.
  918  
  919      Maps are defined as a string of numbers and characters. Since the grid
  920      is 9x9, there are a total of 81 characters necessary to define a
  921      complete map. Below is an example map for an 8-way joystick:
  922  
  923          777888999    Note that the numeric digits correspond to the keys
  924          777888999    on a numeric keypad. So '7' maps to up+left, '4' maps
  925          777888999    to left, '5' maps to neutral, etc. In addition to the
  926          444555666    numeric values, you can specify the character 's',
  927          444555666    which means "sticky". In this case, the value of the
  928          444555666    map is the same as it was the last time a non-sticky
  929          111222333    value was read.
  930          111222333
  931          111222333
  932  
  933      To specify the map for this parameter, you can specify a string of
  934      rows separated by a '.' (which indicates the end of a row), like so:
  935  
  936          777888999.777888999.777888999.444555666.444555666.444555666.
  937          111222333.111222333.111222333
  938  
  939      However, this can be reduced using several shorthands supported by the
  940      <map> parameter. If information about a row is missing, then it is
  941      assumed that any missing data in columns 5-9 are left/right symmetric
  942      with data in columns 0-4; and any missing data in colums 0-4 is
  943      assumed to be copies of the previous data. The same logic applies to
  944      missing rows, except that up/down symmetry is assumed.
  945  
  946      By using these shorthands, the 81 character map can be simply
  947      specified by this 11 character string: 7778...4445
  948  
  949      Looking at the first row, 7778 is only 4 characters long. The 5th
  950      entry can't use symmetry, so it is assumed to be equal to the previous
  951      character '8'. The 6th character is left/right symmetric with the 4th
  952      character, giving an '8'. The 7th character is left/right symmetric
  953      with the 3rd character, giving a '9' (which is '7' with left/right
  954      flipped). Eventually this gives the full 777888999 string of the row.
  955  
  956      The second and third rows are missing, so they are assumed to be
  957      identical to the first row. The fourth row decodes similarly to the
  958      first row, producing 444555666. The fifth row is missing so it is
  959      assumed to be the same as the fourth.
  960  
  961      The remaining three rows are also missing, so they are assumed to be
  962      the up/down mirrors of the first three rows, giving three final rows
  963      of 111222333.
  964  
  965  -joystick_deadzone <value> / -joy_deadzone <value> / -jdz <value>
  966  
  967      If you play with an analog joystick, the center can drift a little.
  968      joystick_deadzone tells how far along an axis you must move before the
  969      axis starts to change. This option expects a float in the range of
  970      0.0 to 1.0. Where 0 is the center of the joystick and 1 is the outer
  971      limit. The default is 0.3.
  972  
  973  -joystick_saturation <value> / joy_saturation <value> / -jsat <value>
  974  
  975      If you play with an analog joystick, the ends can drift a little,
  976      and may not match in the +/- directions. joystick_saturation tells how
  977      far along an axis movement change will be accepted before it reaches
  978      the maximum range. This option expects a float in the range of 0.0 to
  979      1.0, where 0 is the center of the joystick and 1 is the outer limit.
  980      The default is 0.85.
  981  
  982  -natural
  983          Specific whether or not to use a natural keyboard or not.  This allows
  984          you to start your game or system in "partial" keyboard emulation mode,
  985          giving you the ability to use all normal UI keys.  The default is OFF,
  986          (-nonatrual)
  987  
  988  -joystick_contradictory
  989  
  990          Enable contradictory direction digital joystick input at the same time
  991          such as Left and Right or Up and Down at the same time.  The default
  992          is OFF (-nojoystick_contradictory)
  993  
  994  -coin_impulse [n]
  995  
  996          Set coin impulse time based on n (n<0 disable impulse, n==0 obey driver,
  997          0<n set time n).  Default is 0.
  998  
  999  
 1000  
 1001  Core input automatic enable options
 1002  -----------------------------------
 1003  
 1004  -paddle_device       enable (none|keyboard|mouse|lightgun|joystick) if a paddle control is present
 1005  -adstick_device      enable (none|keyboard|mouse|lightgun|joystick) if an analog joystick control is present
 1006  -pedal_device        enable (none|keyboard|mouse|lightgun|joystick) if a pedal control is present
 1007  -dial_device         enable (none|keyboard|mouse|lightgun|joystick) if a dial control is present
 1008  -trackball_device    enable (none|keyboard|mouse|lightgun|joystick) if a trackball control is present
 1009  -lightgun_device     enable (none|keyboard|mouse|lightgun|joystick) if a lightgun control is present
 1010  -positional_device   enable (none|keyboard|mouse|lightgun|joystick) if a positional control is present
 1011  -mouse_device        enable (none|keyboard|mouse|lightgun|joystick) if a mouse control is present
 1012  
 1013      Each of these options controls autoenabling the mouse, joystick, or
 1014      lightgun depending on the presence of a particular class of analog
 1015      control for a particular game. For example, if you specify the option
 1016      -paddle mouse, then any game that has a paddle control will
 1017      automatically enable mouse controls just as if you had explicitly
 1018      specified -mouse. Note that these controls override the values of
 1019      -[no]mouse, -[no]joystick, etc.
 1020  
 1021  
 1022  
 1023  Debugging options
 1024  -----------------
 1025  
 1026  -[no]log
 1027  
 1028      Creates a file called error.log which contains all of the internal
 1029      log messages generated by the MAME core and game drivers. The default
 1030      is OFF (-nolog).
 1031  
 1032  -[no]verbose / -[no]v
 1033  
 1034      Displays internal diagnostic information. This information is very
 1035      useful for debugging problems with your configuration. IMPORTANT: when
 1036      reporting bugs, please run with mame -verbose and include the
 1037      resulting information. The default is OFF (-noverbose).
 1038  
 1039  -[no]update_in_pause
 1040  
 1041      Enables updating of the main screen bitmap while the game is paused.
 1042      This means that the VIDEO_UPDATE callback will be called repeatedly
 1043      during pause, which can be useful for debugging. The default is OFF
 1044      (-noupdate_in_pause).
 1045  
 1046  -[no]debug
 1047  
 1048      Activates the integrated debugger. By default, the debugger is entered
 1049      by pressing the tilde (~) key during emulation. It is also entered
 1050      immediately at startup. The default is OFF (-nodebug).
 1051  
 1052  -debugscript <filename>
 1053  
 1054      Specifies a file that contains a list of debugger commands to execute
 1055      immediately upon startup. The default is NULL (no commands).
 1056  
 1057  -debug_internal
 1058  
 1059          A special 'internal' debugger for debugging.  Activated when used along
 1060          with -debug.  The default if OFF (-nodebug_internal).
 1061          
 1062  
 1063  
 1064  Core misc options
 1065  -----------------
 1066  
 1067  -bios <biosname>
 1068  
 1069      Specifies the specific BIOS to use with the current game, for game
 1070      systems that make use of a BIOS. The -listxml output will list all of
 1071      the possible BIOS names for a game. The default is 'default'.
 1072  
 1073  -[no]cheat / -[no]c
 1074  
 1075      Enables the reading of the cheat database, if present, and the Cheat
 1076      menu in the user interface. The default is OFF (-nocheat).
 1077  
 1078  -[no]skip_gameinfo
 1079  
 1080      Forces MAME to skip displaying the game info screen. The default is
 1081      OFF (-noskip_gameinfo).
 1082  
 1083  -uifont <fontname>
 1084  
 1085      Specifies the name of a font file to use for the UI font.  If this font
 1086          cannot be found or cannot be loaded, the system will fall back to its
 1087          built-in UI font.  On some platforms 'fontname' can be a system font
 1088          name (TTF) instead of a (BDF) font file. The default is 'default' (use 
 1089      the OSD-determined default font).
 1090  
 1091  -ramsize [n]
 1092  
 1093          Allows you to change the default RAM size (if supported by driver).
 1094  
 1095  -confirm_quit
 1096  
 1097          Display a Confirm Quit dialong to screen on exit, requiring one extra
 1098          step to exit MAME.  The default is OFF (-noconfirm_quit).
 1099  
 1100  -ui_mouse
 1101  
 1102          Displays a mouse cursor when using the built-in UI for MAME.  The default
 1103          is (-noui_mouse).