Provided by: mame_0.206+dfsg.1-1_amd64 bug

NAME

       MAME - Multi-purpose emulation framework

SYNOPSIS

       mame [options] gamename

DESCRIPTION

       Started  in 1997 by Nicola Salmoria, MAME was originally intended as a series of emulators
       for individual games, which were later combined into a single multi-game emulator. In  the
       following  years,  MAME  grew  over  and  over  up  to the actual size, with more than 100
       contributors to the project.

OPTIONS

   Core commands
       -help, -?
              Displays current MAME version and copyright notice.

       -validate, -valid
              Performs internal validation on  every  driver  in  the  system.  Run  this  before
              submitting  changes  to  ensure  that  you  haven't violated any of the core system
              rules.

   Configuration commands
       -createconfig, -cc
              Creates the default mame.ini file in the current directory. All  the  configuration
              options  (not  commands) described below can be permanently changed by editing this
              configuration file.

       -showconfig, -sc
              Displays the current configuration settings.

       -showusage, -su
              Displays a summary of all the command  line  options.  For  options  that  are  not
              mentioned here, the short summary given by -showusage is usually sufficient.

   Frontend commands
       All  the list commands below write info to the screen.  If you wish to write the info to a
       textfile instead, use redirection.  For example, mame -listxml > ~/mamelist.xml writes the
       full list of supported game to file mamelist.xml in your home directory.

       -listxml, -lx [gamename|wildcard]
              List  comprehensive  details  for  all  of the supported games. The output is quite
              long, so it is usually better to redirect this into a file.  The output is  in  XML
              format.  By  default  all  games  are  listed;  however, you can limit this list by
              specifying a driver name or wildcard after the -listxml command.

       -listfull, -ll [gamename|wildcard]
              Displays a list of game driver names and descriptions. By  default  all  games  are
              listed;  however,  you  can limit this list by specifying a driver name or wildcard
              after the -listfull command.

       -listsource, -ls [gamename|wildcard]
              Displays a list of drivers and the names of the source  files  their  game  drivers
              live  in.  Useful  for finding which driver a game runs on in order to fix bugs. By
              default all games are listed; however, you can limit  this  list  by  specifying  a
              driver name or wildcard after the -listsource command.

       -listclones, -lc [gamename|wildcard]
              Displays a list of clones. By default all clones are listed; however, you can limit
              this list by specifying a driver name or wildcard after the -listclones command.

       -listbrothers, -lb [gamename|wildcard]
              Displays a list of "brothers" or other drivers from same  sourcefile.   By  default
              all  games are listed; however, you can limit this list by specifying a driver name
              or wildcard after the -listbrothers command.

       -listcrc
              Displays a full list of CRCs of all ROM images referenced  by  all  drivers  within
              MAME code.

       -listroms, -lr gamename
              Displays a list of ROM images referenced by the specified game.

       -listsamples gamename
              Displays a list of samples referenced by the specified game.

       -verifyroms [gamename|wildcard]
              Checks  for  invalid  or missing ROM images. By default all drivers that have valid
              ZIP files or directories in the rom path are verified; however, you can limit  this
              list by specifying a driver name or wildcard after the -verifyroms command.

       -verifysamples [gamename|wildcard]
              Checks  for  invalid or missing samples. By default all drivers that have valid ZIP
              files or directories in the samplepath are verified; however, you  can  limit  this
              list by specifying a driver name or wildcard after the -verifyroms command.

       -romident
              Attempts  to  identify  ROM files, if they are known to MAME, in the specified .zip
              file or directory. This command can be used to try and identify ROM sets taken from
              unknown boards. On exit, the errorlevel is returned as one of the following:
              0  all files were identified
              7  all files were identified except for some "non-ROM" files
              8  some files were identified
              9  no files were identified

       -listdevices, -ld
              Output the list of devices referenced by a given game or set of games.

       -listslots, -lslot
              Output the list of available slots and slot devices for the system.

       -listmedia, -lm
              Output the list of available media for the system.

       -listsoftware, -lsoft
              Output the list of known software for the system.

       -verifysoftware, -vsoft [gamename|wildcard]
              Checks  for  invalid  or missing ROM images in your software lists.  By default all
              drivers that have valid ZIP files or  directories  in  the  rompath  are  verified;
              however, you can limit this list by specifying a specific driver name or wildcard.

       -getsoftlist, -glist
              Retrieve software list by name.

       -verifysoftlist, -vlist [softwarelistname]
              Checks  a  specified software list for missing ROM images if files exist for issued
              softwarelistname. By default, all drivers that have valid ZIP files or  directories
              in  the  rompath  are  verified;  however,  you can limit this list by specifying a
              specific softwarelistname (without .XML).

       -listmidi, -mlist
              Create a list of list available MIDI I/O devices for use with emulation.

       -listnetwork, -nlist
              List available network adapters.

   Configuration options
       -[no]readconfig, -[no]rc
              Enables or disables the reading of the config files. When  enabled  (which  is  the
              default), MAME reads the following config files in order:
              1. mame.ini
              the main configuration file
              2. name.ini
              where  name  is  your executable name, i.e. mame unless you changed it (e.g. if you
              renamed mame to mame0137, the parsed file will be mame0137.ini)
              3. debug.ini, if the debugger is enabled
              4. vector.ini, for vector games only
              5. [driver].ini
              based on the source filename of the game driver
              6. [parent].ini
              for clones only, may be called recursively
              7. [gamename].ini
              note this sometimes resolves to the same of the source driver
              The settings in the later ini's override those  in  the  earlier  ini's.   So,  for
              example,  if  you  wanted  to  disable overlay effects in the vector games, you can
              create a vector.ini with the "effect  none"  line  in  it,  and  it  will  override
              whatever effect value you have in your mame.ini. The default is ON (-readconfig).

       -[no]writeconfig, -[no]wc
              Write configuration to [driver].ini on exit.  Default is OFF (-nowriteconfig).

   Search path options
       Be  careful  to  use the path, directory and file options in mame.ini ONLY. Otherwise, the
       outcome may be unpredictable and not consistent across releases.

       -rompath, -rp, -biospath, -bp pathname
              Specifies a list of paths within which to find ROM or hard disk  images.   Multiple
              paths  can  be specified by separating them with semicolons.  The default is 'roms'
              (that is, a directory "roms" in the same directory as the MAME executable).

       -hashpath pathname
              Specifies a list of paths within which to search for software hash files.  Multiple
              paths  can  be specified by separating them with semicolons.  The default is 'hash'
              (that is, a directory 'hash' in the same directory as the MAME executable).

       -samplepath, -sp pathname
              Specifies a list of paths within which to find sample files. Multiple paths can  be
              specified  by separating them with semicolons. The default is 'samples' (that is, a
              directory "samples" in the same directory as the MAME executable).

       -artpath, -artwork_directory pathname
              Specifies a list of paths within which to find artwork files. Multiple paths can be
              specified  by separating them with semicolons. The default is 'artwork' (that is, a
              directory "artwork" in the same directory as the MAME executable).

       -ctrlrpath, -ctrlr_directory pathname
              Specifies a list of paths within which to  find  controller-specific  configuration
              files.  Multiple  paths  can  be  specified by separating them with semicolons. The
              default is 'ctrlr' (that is, a directory "ctrlr" in the same directory as the  MAME
              executable).

       -inipath pathname
              Specifies  a  list  of paths within which to find .INI files. Multiple paths can be
              specified by separating them with semicolons. The default is '/etc/mame/'.

       -fontpath pathname
              Specifies a list of paths within which to find .BDF font files. Multiple paths  can
              be  specified  by  separating  them  with  semicolons. The default is '.' (that is,
              search in the same directory as the MAME executable).

       -cheatpath pathname
              Specifies a list of paths within which to find cheat files. Multiple paths  can  be
              specified  by  separating  them with semicolons. The default is 'cheat' (that is, a
              directory 'cheat' in the same directory as the MAME executable).

       -crosshairpath pathname
              Specifies a list of paths within which to find crosshair files. Multiple paths  can
              be  specified  by separating them with semicolons. The default is 'crosshair' (that
              is, a directory "crosshair" in the same directory as the MAME executable).  If  the
              Crosshair  is  set  to  default  in  the menu, MAME will look for gamenamespecified
              crosshairpath, where # is the player number.  Failing that, MAME will use  built-in
              default crosshairs.

       -pluginspath pathname
              Specifies  a  single  path  within  which to find plugins. The default is 'plugins'
              (that is, a directory 'plugins' in the same directory as the MAME executable).

       -languagepath pathname
              Specifies a single path within  which  to  find  language  files.  The  default  is
              'language'  (that  is,  a  directory  'language'  in the same directory as the MAME
              executable).

   Output Directory Options
       -cfg_directory pathname
              Specifies a single directory where configuration files are  stored.   Configuration
              files  store  user  configurable settings that are read at startup and written when
              MAME exits. The default is 'cfg' (that is, a directory "cfg" in the same  directory
              as the MAME executable). If this directory does not exist, it will be automatically
              created.

       -nvram_directory pathname
              Specifies a single directory where NVRAM files are stored. NVRAM  files  store  the
              contents  of  EEPROM and non-volatile RAM (NVRAM) for games which used this type of
              hardware. This data is read at startup and written when MAME exits. The default  is
              'nvram'  (that  is,  a  directory  "nvram"  in  the  same  directory  as  the  MAME
              executable). If this directory does not exist, it will be automatically created.

       -input_directory pathname
              Specifies a single  directory  where  input  recording  files  are  stored.   Input
              recordings  are  created  via  the -record option and played back via the -playback
              option. The default is 'inp' (that is, a directory "inp" in the same  directory  as
              the  MAME  executable).  If this directory does not exist, it will be automatically
              created.

       -state_directory pathname
              Specifies a single directory where save state files are stored.  Save  state  files
              are  read and written either upon user request, or when using the -autosave option.
              The default is 'sta' (that is, a directory "sta" in the same directory as the  MAME
              executable). If this directory does not exist, it will be automatically created.

       -snapshot_directory pathname
              Specifies  a  single directory where screen snapshots are stored, when requested by
              the user. The default is 'snap' (that is, a directory "snap" in the same  directory
              as the MAME executable). If this directory does not exist, it will be automatically
              created.

       -diff_directory pathname
              Specifies a single directory where hard drive differencing files are  stored.  Hard
              drive  differencing files store any data that is written back to a hard disk image,
              in order to preserve the original image. The  differencing  files  are  created  at
              startup  when  a  game  with  a  hard disk image. The default is 'diff' (that is, a
              directory "diff" in the same directory as the MAME executable). If  this  directory
              does not exist, it will be automatically created.

       -comment_directory pathname
              Specifies  a  single  directory  where debugger comment files are stored.  Debugger
              comment files  are  written  by  the  debugger  when  comments  are  added  to  the
              disassembly  for a game. The default is 'comments' (that is, a directory "comments"
              in the same directory as the MAME executable).  If this directory does  not  exist,
              it will be automatically created.

   State/playback options
       -state slot
              Immediately  after  starting  the  specified game, will cause the save state in the
              specified slot to be loaded.

       -[no]autosave
              When enabled, automatically creates  a  save  state  file  when  exiting  MAME  and
              automatically  attempts  to  reload it when later starting MAME with the same game.
              This only works for games that have explicitly enabled save state support in  their
              driver. The default is OFF (-noautosave).

       -playback, -pb filename
              Specifies a file from which to play back a series of game inputs. This feature does
              not work reliably for all games, but can be used to  watch  a  previously  recorded
              game  session  from start to finish. In order to make things consistent, you should
              only record and playback with all configuration (.cfg),  NVRAM  (.nv),  and  memory
              card files deleted. The default is NULL (no playback).

       -[no]exit_after_playback
              If  play  back is enabled (see -playback option) the program exits when end of file
              is  reached.  Otherwise  the  machine  will  continue  to  run.   Default  is   OFF
              (-noexit_after_playback).

       -record, -rec filename
              Specifies  a  file  to  record  all  input from a game session. This can be used to
              record a game session for later playback. This feature does not work  reliably  for
              all  games,  but can be used to watch a previously recorded game session from start
              to finish. In order to make things consistent, you should only record and  playback
              with  all  configuration  (.cfg),  NVRAM  (.nv), and memory card files deleted. The
              default is NULL (no recording).

       -[no]record_timecode
              Specify whether to create a timecode file. It contains a line with elapsed times on
              each  press of timecode shortcut key (default is F12).  This option works only when
              recording mode is enabled (-record option).  The  file  is  saved  on  inp  folder.
              Default is OFF (-norecord_timecode).

       -mngwrite filename
              Writes each video frame to the given filename in MNG format, producing an animation
              of the  game session. Note that -mngwrite only writes video  frames;  it  does  not
              save  any  audio data. Use -wavwrite for that, and reassemble the audio/video using
              offline tools. The default is NULL (no recording).

       -aviwrite filename
              Stream video and sound data to the given  filename  in  AVI  format,  producing  an
              animation  of  the  game  session  complete  with  sound.  The  default is NULL (no
              recording).

       -wavwrite filename
              Writes the final mixer output to the given filename in  WAV  format,  producing  an
              audio recording of the  game session. The default is NULL (no recording).

       -snapname string
              Describes how MAME should name files for snapshots. string provides a template that
              is used to generate a filename. Three simple  substitutions  are  provided:  the  /
              character  represents the path separator on any target platform (even Windows); the
              literal %g represents the driver name of the  current  game;  and  the  literal  %i
              represents  an  incrementing index. If %i is omitted, then each snapshot taken will
              overwrite the previous one; otherwise, MAME will find the next empty value  for  %i
              and  use that for a filename. The default is %g/%i, which creates a separate folder
              for each game, and names the snapshots under it starting with 0000  and  increasing
              from  there.  Example:  if  you use mame robby -snapname foo/%g%i snapshots will be
              saved as snaps/foo/robby0000.png, snaps/foo/robby0001.png and so on.

       -snapsize widthxheight
              Hard-codes the size for snapshots and movie recording. By default, MAME will create
              snapshots at the game's current resolution in raw pixels, and will create movies at
              the game's starting resolution in raw pixels. If you specify this option, then MAME
              will  create  both  snapshots  and  movies at the size specified, and will bilinear
              filter the result. Note that this size does not automatically rotate if the game is
              vertically oriented. The default is 'auto'.

       -snapview internal|auto|viewname
              Specifies the view to use when rendering snapshots and movies. By default, both use
              a special 'internal' view, which renders a separate snapshot per screen or  renders
              movies  only  of the first screen. By specifying this option, you can override this
              default behavior and select a single view that will  apply  to  all  snapshots  and
              movies.   Note  that  viewname does not need to be a perfect match; rather, it will
              select the first view whose name matches all the characters specified by  viewname.
              For  example,  -snapview native will match the "Native (15:14)" view even though it
              is not a perfect match.  viewname can also be 'auto', which selects the first  view
              with all screens present. The default value is 'internal'.

       -[no]snapbilinear
              Specify  whether snapshot/movie should have bilinear filtering applied.  Default is
              ON (-snapbilinear).

       -statename string
              Describes how MAME should store save state files, relative to  the  state_directory
              path.  string  provides  a  template  that is used to generate a relative path. Two
              simple substitutions are provided: the / character represents the path separator on
              any  target  platform  (even Windows); the literal %g represents the driver name of
              the current game. The default is '%g', which creates a  separate  folder  for  each
              game.  Example:  if you use mame robby -statename foo/%g save states will be stored
              inside sta/foo/robby/.

       -[no]burnin
              Tracks brightness of the screen during play and at the end of emulation generates a
              PNG  that can be used to simulate burn-in effects on other games. The resulting PNG
              is created such that the least-used areas of the  screen  are  fully  white  (since
              burned-in  areas  are  darker,  all  other  areas of the screen must be lightened a
              touch).  The intention is that this PNG can be loaded via an artwork  file  with  a
              low alpha (e.g, 0.1-0.2 seems to work well) and blended over the entire screen. The
              PNG    files    are    saved    in     the     snap     directory     under     the
              gamename\burnin-<screen.name>.png. The default is OFF (-noburnin).

   Performance options
       -[no]autoframeskip, -[no]afs
              Automatically  determines  the  frameskip  level  while  you're  playing  the game,
              adjusting it constantly in a frantic attempt to  keep  the  game  running  at  full
              speed.  Turning  this on overrides the value you have set for -frameskip below. The
              default is OFF (-noautoframeskip).

       -frameskip, -fs value
              Specifies the frameskip value (autoframeskip must be disabled). This is the  number
              of  frames out of every 12 to drop when running. For example, if you say -frameskip
              2, then MAME will display 10 out of every 12 frames. By skipping those frames,  you
              may  be  able  to  get full speed in a game that requires more horsepower than your
              computer has. The default value is 0, which skips no frames.

       -seconds_to_run, -str value
              This option can be used for benchmarking and automated testing. It  tells  MAME  to
              stop  execution after a fixed number of seconds. By combining this with a fixed set
              of other command line  options,  you  can  set  up  a  consistent  environment  for
              benchmarking MAME performance. In addition, upon exit, the -str option will write a
              screenshot called final.png to the game's snapshot directory.

       -[no]throttle
              Configures the default thottling setting. When throttling is on, MAME  attempts  to
              keep  the  game  running at the game's intended speed. When throttling is off, MAME
              runs the game as fast as it can. Note that the fastest speed is more often than not
              limited  by  your  graphics  card,  especially  for  older games. The default is ON
              (-throttle).

       -[no]sleep
              Allows MAME to give time back to the system  when  running  with  -throttle.   This
              allows  other  programs  to have some CPU time, assuming that the game isn't taxing
              100%  of  your  CPU  resources.  This  option  can  potentially  cause  hiccups  in
              performance if other demanding programs are running.  The default is ON (-sleep).

       -speed value
              Controls  the  speed of gameplay, relative to realtime; smaller numbers are slower.
              Default is 1.00.

       -[no]refreshspeed, -[no]rs
              Automatically adjusts the -speed parameter to keep the effective refresh rate below
              that of the lowest screen refresh rate.  Default is OFF (-norefreshspeed).

       -numprocessors, -np value
              Set number of processors; this overrides the number the system reports.

       -bench value
              Benchmark for the given number of emulated seconds; implies -video none -sound none
              -nothrottle.

       -[no]sdlvideofps
              Show SDL video performance. Default is OFF (-nosdlvideofps).

   Rotation options
       -[no]rotate
              Rotate the game to match its normal state (horizontal/vertical). This ensures  that
              both  vertically and horizontally oriented games show up correctly without the need
              to rotate your monitor. If you want to keep the game displaying 'raw' on the screen
              the  way  it  would  have  in  the  arcade, turn this option OFF. The default is ON
              (-rotate).

       -[no]ror | -[no]rol
              Rotate the game screen to  the  right  (clockwise)  or  left  (counter-  clockwise)
              relative  to  either its normal state (if -rotate is specified) or its native state
              (if -norotate is specified).  Default for both is OFF (-noror -norol).

       -[no]autoror | -[no]autorol
              These options are designed for use with pivoting  screens  that  only  pivot  in  a
              single direction. If your screen only pivots clockwise, use -autorol to ensure that
              the game will fill the screen either horizontally  or  vertically  in  one  of  the
              directions  you  can  handle.   If  your  screen only pivots counter-clockwise, use
              -autoror.  Default for both is OFF (-noautoror -noautorol).

       -[no]flipx -[no]flipy
              Flip (mirror) the game screen either horizontally (-flipx) or vertically  (-flipy).
              The flips are applied after the -rotate and -ror/-rol options are applied.  Default
              for both is OFF (-noflipx -noflipy).

   Artwork options
       -[no]artwork_crop, -[no]artcrop
              Enable cropping of artwork to the game screen area only. This option  can  also  be
              controlled  via  the  Video  Options menu in the user interface. The default is OFF
              (-noartwork_crop).

       -[no]use_backdrops, -[no]backdrop
              Enables/disables the display of backdrops. The default is ON (-use_backdrops).

       -[no]use_overlays, -[no]overlay
              Enables/disables the display of overlays. The default is ON (-use_overlays).

       -[no]use_bezels, -[no]bezel
              Enables/disables the display of bezels. The default is ON (-use_bezels).

       -[no]use_cpanels, -[no]cpanel
              Enables/disables the display of cpanels. The default is ON (-use_bezels).

       -[no]use_marquees, -[no]marquee
              Enables/disables the display of marquees. The default is ON (-use_bezels).

   Screen options
       -brightness value
              Controls the default brightness, or black level, of the game screens.  This  option
              does  not affect the artwork or other parts of the display.  Using the MAME UI, you
              can individually set the brightness for each game screen; this option controls  the
              initial  value  for  all visible game screens. The standard value is 1.0. Selecting
              lower values (down to 0.1) will produce a darkened display, while selecting  higher
              values (up to 2.0) will give a brighter display. The default is 1.0.

       -contrast value
              Controls  the  contrast,  or white level, of the game screens. This option does not
              affect the artwork or other parts of the  display.  Using  the  MAME  UI,  you  can
              individually  set  the  contrast  for  each  game  screen; this option controls the
              initial value for all visible game screens. The standard value  is  1.0.  Selecting
              lower  values  (down  to 0.1) will produce a dimmer display, while selecting higher
              values (up to 2.0) will give a more saturated display. The default is 1.0.

       -gamma value
              Controls the gamma, which produces a potentially nonlinear black to white ramp, for
              the  game  screens.  This  option does not affect the artwork or other parts of the
              display. Using the MAME UI, you can  individually  set  the  gamma  for  each  game
              screen;  this  option  controls the initial value for all visible game screens. The
              standard value is 1.0, which gives a linear ramp from  black  to  white.  Selecting
              lower  values  (down  to  0.1)  will  increase the nonlinearity toward black, while
              selecting higher values (up to 3.0) will push the nonlinearity  toward  white.  The
              default is 1.0.

       -pause_brightness value
              This controls the brightness level when MAME is paused. The default value is 0.65.

       -effect [none|filename[.png]]
              Name of a PNG file to use for visual effects, or 'none'. Default is 'none'.

   Vector rendering options
       -beam_width_min value

       -beam_width_max value
              Sets the minimum and maximum width of the vectors. This is a scaling factor against
              the standard vector width,  which  is  interpolated  between  minimum  and  maximum
              according to the beam's intensity. A value of 1.0 will keep the default vector line
              width. Smaller values will reduce the width, and larger values  will  increase  the
              width. The default is 1.0.

       -beam_intensity_weight value
              Applies  an  exponential weight to the minimum and maximum beam width. For positive
              values the interpolated scaling factor will affect lines with higher intensity more
              than lines with lower intensity. The default is 0.0.

       -flicker value
              Simulates  a  vector  "flicker"  effect,  similar  to  a  vector monitor that needs
              adjustment. This option requires a float  argument  in  the  range  of  0.00-100.00
              (0=none, 100=maximum). The default is 0.

   Video options
       -video [soft|opengl|bgfx|none]
              Specifies which video subsystem to use for drawing:
              soft  uses software rendering, which is slower but more compatible.
              opengl   uses  OpenGL  and  your  graphics  accelerator to speed up many aspects of
              drawing MAME including compositing  artwork,  overlays,  and  bezels,  as  well  as
              stretching the image to fit your screen.
              bgfx   uses the bgfx renderer which supports portable shaders and multiple graphics
              APIs including OpenGL, OpenGL ES and DirectX.
              none  does no drawing and is intended for CPU benchmarking.
              Default is 'soft' on Linux or 'opengl' on macOS.

       -numscreens [1-4]
              Number of screens to create; usually, you want just one. Default is '1'.

       -[no]window, -[no]w
              Run MAME in either full screen or a window. This is a  fully-featured  window  mode
              where  the  window  resizes  as necessary to track what the game does.  And you can
              resize it  yourself with your OS's standard window controls.  The  default  is  OFF
              (-nowindow).

       -[no]maximize, -[no]max
              Controls  initial  window  size  in windowed mode. If it is set on, the window will
              initially be set to the maximum supported size when you start MAME. If it is turned
              off, the window will start out at the smallest supported size. This option only has
              an effect when the -window option is used. The default is ON (-maximize).

       -[no]keepaspect, -[no]ka
              Forces the correct aspect ratio. This means when  you're  resizing  the  window  in
              windowed  mode  the actual game image will resize in discrete steps to maintain the
              proper shape of the game graphics. If you turn this off you can resize  the  window
              to  anything you like and get funny squishing and stretching.  The same applies for
              full-screen. Default is ON (-keepaspect).

       -[no]unevenstretch, -[no]ues
              Allow non-integer stretch factors. Video purists should stay  far,  far  away  from
              this  option,  while  everyone else will be happy to know that it lets you fill the
              screen properly in full-screen mode. Default is ON (-unevenstretch).

       -[no]unevenstretchx, -[no]uesx
              Act as -[no]unevenstretch on horizontal basis only.

       -[no]intoverscan, -[no]ios
              Allow overscan on integer scaled targets.

       -intscalex, -sx
              Set horizontal integer scale factor.

       -intscaley, -sy
              Set vertical integer scale factor.

       -[no]centerh
              Center horizontally within the view area. Default is ON (-centerh).

       -[no]centerv
              Center vertically within the view area. Default is ON (-centerv).

       -[no]waitvsync, -[no]vs
              Enable waiting for the start of VBLANK before  flipping  screens;  reduces  tearing
              effects. Default is OFF (-nowaitvsync).

       -[no]syncrefresh, -[no]srf
              Enable  using the start of VBLANK for throttling instead of the game time.  Default
              is OFF (-nosyncrefresh).

   Software video rendering subsystem options
       NOTE: All the options in this group  are  available  only  with  softare  video  rendering
       subsystem, i.e -video soft.

       -prescale [value]
              Scale screen rendering by this amount in software. Default is 1.

       -scalemode, -sm [none|async|yv12|yuy2|yv12x2|yuy2x2]
              Hardware scaling mode.
              none    use software rendering.
              async   async overlay.
              yv12    yv12 overlay.
              yuy2    yuy2 overlay.
              yv12x2  yv12 overlay using x2 prescaling.
              yuy2x2  yuy2 overlay using x2 prescaling.
              Default is NONE.

   OpenGL video rendering subsystem options
       NOTE:  All  the  options  in  this  group  are  available only with OpenGL video rendering
       subsystem, i.e -video opengl.

       -[no]filter, -[no]glfilter, -[no]flt
              Enable bilinear filtering on screen output. Default is ON (-filter).

       -prescale [value]
              Scale screen rendering by this amount in software. Default is 1.

       -[no]gl_forcepow2texture
              Force power of two textures. Default is OFF (-nogl_forcepow2texture).

       -[no]gl_notexturerect
              Don't use OpenGL GL_ARB_texture_rectangle. Turn off if corruption occurs in  OpenGL
              mode, at cost of some performance loss. Default is ON (-gl_notexturerect).

       -[no]gl_vbo
              Enable  OpenGL  VBO,  if  available,  for  a  performance  increase.   Turn  off if
              corruption occurs. Default is ON (-gl_vbo).

       -[no]gl_pbo
              Enable OpenGL  PBO,  if  available,  for  a  performance  increase.   Turn  off  if
              corruption occurs. Default is ON (-gl_pbo).

       -[no]gl_glsl
              Enable  OpenGL  GLSL,  if  available,  for  a performance increase.  Default is OFF
              (-nogl_glsl).

       -gl_glsl_filter value
              Enable OpenGL GLSL filtering instead of FF filtering 0=plain, 1=bilinear.   Default
              is 1: bilinear.

       -glsl_shader_mame[0-9]
              Preferred custom OpenGL GLSL shader set mame bitmap (from 0 to 9).

       -glsl_shader_screen[0-9]
              Preferred custom OpenGL GLSL shader screen bitmap (from 0 to 9).

       -screen
              Explicit name for all screens; 'auto' here will try to make a best guess.

       -aspect, -screen_aspect
              Aspect ratio for all screens; 'auto' here will try to make a best guess.

       -resolution, -r
              Preferred  resolution  for  all  screens;  format  is widthxheight[@refreshrate] or
              'auto'.

       -view  Preferred view for all screens

       -screen[0-3]
              Explicit name of the first|second|third|fourth screen; 'auto' here will try to make
              a best guess.

       -aspect[0-3]
              Aspect  ratio of the first|second|third|fourth screen; 'auto' here will try to make
              a best guess.

       -resolution[0-3], -r[0-3]
              Preferred  resolution  for  the   first|second|third|fourth   screen;   format   is
              widthxheight[@refreshrate] or 'auto'.

       -view[0-3]
              Preferred view for the first|second|third|fourth screen.

   BGFX post-processing options
       NOTE:  All the options in this group are available only when BGFX video post-processing is
       enabled, i.e -video bgfx. For full info on BGFX please visit official  MAME  documentation
       page:
       http://docs.mamedev.org/advanced/bgfx.html

       -bgfx_path pathname
              This is where your BGFX shader files are stored.  The default is 'bgfx' (that is, a
              directory "bgfx" in the same directory as the MAME executable).

       -bgfx_backend auto|opengl
              Selects a rendering backend for BGFX to use. The default is 'auto', which will  let
              MAME choose the best selection for you.

       -bgfx_debug
              Enables BGFX debugging features. Most users will not need to use this.

       -bgfx_screen_chains default|unfiltered|hlsl[,...]
              This  dictates  how  to  handle  BGFX  rendering  on a per-display basis.  For each
              display specify one of the possible choices:
              default     default bilinear filterered output
              unfiltered  nearest neighbor unfiltered output
              hlsl        HLSL display simulation through shaders
              Separate directives for each window with a comma (,) and for each  physical  screen
              with  a  colon (:). For example, for an emulated game with 3 displays emulated on 3
              windows on your monitor, -bgfx_screen_chains  default,unfiltered,default  specifies
              to  apply default filter on what is been rendered on the first and third window and
              leave the content of the second window unfiltered.

       -bgfx_shadow_mask filename
              This specifies the shadow mask effect PNG file. Default is 'slot-mask.png'.

       -bgfx_avi_name filename
              This specifies a filename for BGFX output logging.

   Full screen options
       -[no]switchres
              Affects full screen mode only. Chooses  if  MAME  can  try  to  change  the  screen
              resolution  (color  depth is normally left alone) when in full-screen mode. If it's
              off, you always get your desktop resolution  in  full-screen  mode  (which  can  be
              useful for LCDs). Default is OFF (-noswitchres).

       -[no]useallheads
              Split full screen image across monitors. Default is OFF (-nouseallheads).

   Sound options
       -sound [sdl|portaudio|coreaudio|dsound|xaudio2|none]
              Specifies which sound subsystem to use for audio output:
              sdl   uses  the  Simple  DirectMedia  Layer  audio  output system (not available on
              Windows by default).
              portaudio  uses  the  PortAudio  library  which  supports  low-latency  output  and
              multiple audio APIs.
              coreaudio   uses the Core Audio API which supports low-latency output and AudioUnit
              effects (only available on macOS).
              dsound  uses the DirectSound API (only available on Windows).
              xaudio2  uses the XAudio2 API which supports low-latency output (only available  on
              Windows).
              none  produces no audio output.
              Default is 'dsound' on Windows, 'coreaudio' on macOS or 'sdl' on other platforms.

       -samplerate, -srf value
              Sets  the  audio sample rate. Smaller values (e.g. 11025) cause lower audio quality
              but faster emulation speed. Higher values (e.g. 48000) cause higher  audio  quality
              but slower emulation speed. The default is 48000.

       -[no]samples
              Use samples if available. The default is ON (-samples).

       -volume, -vol value
              Sets  the startup volume. It can later be changed with the user interface (see Keys
              section). The volume is an attenuation in dB: e.g., "-volume -12" will  start  with
              -12dB attenuation. The default is 0.

       -audio_latency value
              This  controls  the  amount  of  latency built into the audio streaming.  The exact
              behavior depends on the selected audio  output  module  (see  the  -sound  option).
              Smaller  values provide less audio delay while requiring better system performance.
              Higher values increase audio delay but may help avoid buffer under-runs  and  audio
              interruptions.  The default is 1.

   Input options
       -[no]coin_lockout, -[no]coinlock
              Enables simulation of the "coin lockout" feature that is implmeneted on a number of
              game PCBs. It was up to the operator whether or not the coin lockout  outputs  were
              actually  connected  to  the  coin  mechanisms.  If  this  feature is enabled, then
              attempts to enter a coin while the lockout is active will fail and will  display  a
              popup  message in the user interface. If this feature is disabled, the coin lockout
              signal will be ignored. The default is ON (-coin_lockout).

       -ctrlr controller
              Enables support for special controllers. Configuration files are  loaded  from  the
              ctrlrpath.  They  are in the same format as the .cfg files that are saved, but only
              control configuration data  is  read  from  the  file.  The  default  is  NULL  (no
              controller file).

       -[no]mouse
              Controls whether or not MAME looks for a mouse controller to use. Note that in many
              cases, lightguns are treated as mice by the operating system, so you  may  need  to
              enable  this to enable lightgun support. When this is enabled, you will not be able
              to use your mouse while playing a game. If you want to get control of your computer
              back,  you  will  need  to  either  pause  the  game  or  quit.  The default is OFF
              (-nomouse).

       -[no]joystick, -[no]joy
              Controls whether or not MAME looks for joystick/gamepad controllers.   The  default
              is ON (-joystick).

       -[no]lightgun, -[no]gun
              Controls  whether  or  not  MAME makes use of lightgun controllers.  Note that most
              lightguns map to the mouse, so using -lightgun  and  -mouse  together  may  produce
              strange results. The default is OFF (-nolightgun).

       -[no]multikeyboard, -[no]multikey
              Determines  whether  MAME  differentiates between multiple keyboards.  Some systems
              may report more than one keyboard; by default, the data from all of these keyboards
              is  combined  so  that it looks like a single keyboard. Turning this option on will
              enable MAME to report keypresses on different keyboards independently. The  default
              is OFF (-nomultikeyboard).

       -[no]multimouse
              Determines  whether  MAME  differentiates  between  multiple mice. Some systems may
              report more than one mouse device; by default, the data from all of these  mice  is
              combined  so  that it looks like a single mouse. Turning this option on will enable
              MAME to report mouse movement and button presses on different  mice  independently.
              The default is OFF (-nomultimouse).

       -[no]steadykey, -[no]steady
              Some  games  require  two or more buttons to be pressed at exactly the same time to
              make special moves. Due to limitations in the  PC  keyboard  hardware,  it  can  be
              difficult  or  even  impossible  to  accomplish  that  using  the standard keyboard
              handling. This option selects a different handling that makes it easier to register
              simultaneous  button  presses,  but  has  the  disadvantage of making controls less
              responsive. The default is OFF (-nosteadykey).

       -[no]ui_active
              Enable MAME user  interface  on  top  of  emulated  keyboard  (if  present).   User
              interface  may  be  toggled  during  execution  by  pressing  the  key defined with
              -ui_modekey.  Default is OFF (-noui_active).

       -[no]offscreen_reload, -[no]reload
              Controls whether or not MAME treats a second button input  from  a  lightgun  as  a
              reload  signal.  In  this case, MAME will report the gun's position as (0,MAX) with
              the trigger held, which is equivalent to an offscreen reload. This is  only  needed
              for games that required you to shoot offscreen to reload, and then only if your gun
              does not support off screen reloads. The default is OFF (-nooffscreen_reload).

       -joystick_map, -joymap map
              Controls  how  joystick   values   map   to   digital   joystick   controls.    See
              /usr/share/doc/mame/config.txt for full details on map format.

       -joystick_deadzone, -joy_deadzone, -jdz value
              If   you   play   with   an  analog  joystick,  the  center  can  drift  a  little.
              joystick_deadzone tells how far along an axis you must move before the axis  starts
              to  change.  This option expects a float in the range of 0.0 to 1.0. Where 0 is the
              center of the joystick and 1 is the outer limit. The default is 0.3.

       -joystick_saturation, -joy_saturation, -jsat value
              If you play with an analog joystick, the ends can drift a little, and may not match
              in  the  +/-  directions.  joystick_saturation tells how far along an axis movement
              change will be accepted before it reaches the maximum range. This option expects  a
              float  in  the  range of 0.0 to 1.0, where 0 is the center of the joystick and 1 is
              the outer limit.  The default is 0.85.

       -[no]natural, -[no]nat
              Allows user to specify whether or not to use a natural keyboard.  This  allows  you
              to start your game or system in a 'native' mode, depending on your region, allowing
              compatibility for non-"QWERTY" style keyboards.  The default is OFF (-nonatural).

       -[no]joystick_contradictory, -[no]joy_contradictory
              Enable contradictory direction digital joystick input at the same time.  Default is
              OFF (-nojoystick_contradictory).

       -coin_impulse time
              Set  coin impulse time. A negative value for time disables the impulse; set time to
              0 to obey driver or give a positive value to set impulse time.

       -uimodekey, -umk value
              Specifies the key used to toggle between full and partial UI mode.

       -uifontprovider auto|sdl|none
              Provider for ui font.

       -output console|network|none
              Provider for output.

       -keyboardprovider auto|sdl|none
              Provider for keyboard input.

       -mouseprovider auto|sdl|none
              Provider for mouse input.

       -lightgunprovider auto|none
              Provider for lightgun input.

       -joystickprovider auto|sdl|none
              Provider for joystick input.

       -[no]keymap
              Enable keymap for non-QWERTY keyboards.  Used  in  conjunction  with  -keymap_file.
              Default is OFF (-nokeymap).

       -keymap_file keymap_file
              Specifies  the  full  path  to  the  keymap file to be used. A few keymap files are
              available in /usr/share/games/mess/keymaps.

       -joy_idx[0-8] joystick
              With these options you can assign a joystick to a specific index in MAME.  Even  if
              the kernel will list the joysticks in a different order on the next boot, MAME will
              still see the joystick as e.g. "Joystick 2". Use mame -v to see which joysticks are
              recognized.  Default is 'auto'.

       -[no]sixaxis
              Use special handling for PS3 Sixaxis controllers.  Default is OFF (-nosixaxis).

       -mouse_index[1-8]
              Map mouse to specific index in MAME.

       -keyb_idx[0-8] keyboard
              With these options you can assign a keyboard to a specific index in MAME.

       -videodriver, -vd auto|x11|directfb
              SDL video driver to use; 'auto' selects SDL default.

       -renderdriver, -rd auto|software|opengl|directfb
              SDL render driver to use; 'auto' selects SDL default.

       -audiodriver, -ad auto|alsa|arts
              SDL audio driver to use; 'auto' selects SDL default.

       -gl_lib auto|alsa|arts
              Alternative libGL.so to use; 'auto' selects SDL default.

   Input automatic enable options
       -paddle_device, -paddle [none|keyboard|mouse|lightgun|joystick]

       -adstick_device, -adstick [none|keyboard|mouse|lightgun|joystick]

       -pedal_device, -pedal [none|keyboard|mouse|lightgun|joystick]

       -dial_device, -dial [none|keyboard|mouse|lightgun|joystick]

       -trackball_device, -trackball [none|keyboard|mouse|lightgun|joystick]

       -lightgun_device [none|keyboard|mouse|lightgun|joystick]

       -positional_device [none|keyboard|mouse|lightgun|joystick]

       -mouse_device [none|keyboard|mouse|lightgun|joystick]
              Each  of  these  options  controls  automatically  enabling  the mouse, or joystick
              depending on the presence of a particular class of analog control for a  particular
              game.  For example, if you specify the option -paddle mouse, then any game that has
              a paddle control will automatically enable  mouse  controls  just  as  if  you  had
              explicitly  specified  -mouse.   Note  that  these  controls override the values of
              -[no]mouse, -[no]joystick, etc.

   Debugging options
       -[no]log
              Creates a file called error.log which contains all of  the  internal  log  messages
              generated by the MAME core and game drivers. The default is OFF (-nolog).

       -[no]verbose, -[no]v
              Displays  internal  diagnostic  information.  This  information  is very useful for
              debugging problems with your configuration. IMPORTANT: when reporting bugs,  please
              run  with  mame  -verbose and include the resulting information. The default is OFF
              (-noverbose).

       -[no]update_in_pause
              Enables updating the screen bitmap while the game is paused.  This  is  useful  for
              debuggin  in  some  scenarios  (and  gets  in  the  way in others).  Default is OFF
              (-noupdate_in_pause).

       -[no]debug, -[no]d
              Activates the integrated debugger. By default, the debugger is entered by  pressing
              the  tilde (~) key during emulation. It is also entered immediately at startup. The
              default is OFF (-nodebug).

       -debugscript filename
              Specifies a file that contains a list of debugger commands to  execute  immediately
              upon startup. The default is NULL (no commands).

       -debugger debugger_name
              Name of the debugger to use. Default is AUTO.

       -debugger_font, -dfont font_name
              Specifies the font to use for debugging. Default is AUTO.

       -debugger_font_size, -dfontsize size
              Specifies the font size to use for debugging.

       -[no]oslog
              Outputs  the  error.log  data  to the system debugger. This can be used at the same
              time as -log to output the log data to  both  targets  as  well.   Default  is  OFF
              (-nooslog).

   Communication options
       -comm_localhost
              Local address to bind to.

       -comm_localport
              Local port to bind to.

       -comm_remotehost
              Remote address to connect to.

       -comm_remoteport
              Remote port to connect to.

   Misc options
       -[no]drc
              Enable DRC cpu core if available. Default is ON (-drc).

       -[no]drc_use_c
              Force DRC use C backend. Default is OFF (-nodrc_use_c).

       -[no]drc_log_uml
              Write DRC UML disassembly log. Default is OFF (-nodrc_log_uml).

       -[no]drc_log_native
              Write DRC native disassembly log. Default is OFF (-no_drc_log_native).

       -bios biosname
              Specifies  the  specific  BIOS  to use with the current game, for game systems that
              make use of a BIOS. The -listxml output will list all of the  possible  BIOS  names
              for a game. The default is 'default'.

       -[no]cheat, -[no]c
              Activates  the  cheat  menu  with  autofire options and other tricks from the cheat
              database, if present.  The default is OFF (-nocheat).

       -[no]skip_gameinfo
              Forces  MAME  to  skip  displaying  the  game  info  screen.  The  default  is  OFF
              (-noskip_gameinfo).

       -uifont fontname
              Specifies  the  name of a BDF font file to use for the UI font. If this font cannot
              be found or cannot be loaded, the system will fall back to its built-in UI font. On
              some  platforms  fontname can be a system font name instead of a BDF font file. The
              default is 'default' (use the OSD-determined default font).

       -ui simple|cabinet
              Type of UI.

       -ramsize, -ram value
              Size of RAM (if supported by driver).

       -[no]confirm_quit
              Display confirm quit screen on exit. Default is ON (-confirm_quit).

       -[no]ui_mouse
              Display UI mouse cursor. Default is OFF (-noui_mouse).

       -autoboot_command, -ab command
              Command string to execute after machine boot (in quotes "").  To issue a  quote  to
              the  emulation,  use  """  in the string.  Using \n will issue a create a new line,
              issuing what was  typed  prior  as  a  command.  Example:  -autoboot_command  "load
              """$""",8,1\n".

       -autoboot_delay [value]
              Timer delay (in seconds) to trigger command execution on autoboot.  Default is 2.

       -autoboot_script, -script [filename.lua]
              File containing scripting to execute after machine boot.

       -[no]console
              Enable emulator LUA console. Default is OFF (-noconsole).

       -[no]plugins
              Enable LUA plugin support. Default is ON (-plugins).

       -plugin value
              List of plugins to enable.

       -noplugin value
              List of plugins to disable.

       -language, -lang value
              Display language. Default is 'English'.

       -watchdog value
              Specifies  a  number  of  seconds  after which MAME should automatically exit if it
              detects that the emulation has locked up.

SEE ALSO

       chdman(1), jedutil(1), ldresample(1), ldverify(1), romcmp(1)

LEGAL NOTICE

       Please visit the MAME website for some important legal information:

       http://mamedev.org/legal.html