Provided by: gngb_20060309-4_amd64 bug


       gngb - emulate various Nintendo Game Boy handheld systems


       gngb [-h] | [options] <romname>


       gngb  is  an  emulator  program  that  attempts  to  be various forms of Nintendo Game Boy
       hardware.  It can run the various homebrew games and demos  for  the  system  as  well  as
       images of commercially-released games.

       This  manual  page  was written for the Debian GNU/Linux distribution because the original
       program does not have a manual page.


       The program follows the usual GNU command line syntax, with long options starting with two
       dashes (`-').  A summary of options are included below.

       -h, --help
              print help and exit

       -a, --autoframeskip
              turn  on  autoframeskip.   This  is useful if the emulator is running too slow.  It
              will cause the emulator to drop frames every now and then to  maintain  a  realtime

              sleep  when  idle.   This  will  cause the program to sleep when it has idle cycles
              instead of busy looping.  However, this can  degrade  emulation  performance  under
              some circumstances.

              turn on the color filter.

       -r, --rumble
              turn on the rumble simulation.  This will cause the emulated screen to shake when a
              rumble effect is caused by the running program.

              Set the filter to apply.  These only work when using standard (not YUV or GL) video
              output.  0 = none 1 = scanline 2 = scanline 50% 3 = smooth 4 = pseudo cell shading

       -R, --res=WxH
              set the screen resolution to WxH (for YUV and GL mode only).

       -Y, --yuv
              turn YUV mode on.  This utilizes the hardware YUV colorspace conversion and scaling
              features if your video card supports it.  Most video cards with Xv support can  use
              this feature for excellent performance.

              set the type of the YUV overlay: 0 = YV12  1 = YUY2

       -o, --opengl
              turn  OpenGL mode on.  This will render the gameboy screen as an OpenGL 3D texture,
              which on some cards may perform much better than  the  YUV  or  X11  output.   This
              requires a 3D card with GLX support.

       -f, --fullscreen
              run gngb in fullscreen.  Fullscreen can be toggled during use with F9.

       --fps  Show  frames per second counter in the upper left corner of screen.  May be toggled
              through the emulator's menu.

       -s, --sound
              Enable sound.

              Set the sound output sample rate to RATE. (typically a multiple of 11025 Hz)

              Automatically detect the system to emulate based on the  cartridge  image  that  is
              selected.   This  should work in most cases.  If it fails, you can use one of the [
              -C, --color_gb | -G, --normal_gb | -S, --super_gb ] options to force emulation of a
              Color, Normal, or Super Game Boy.

       -j, --joy_dev=N
              The  default joystick is /dev/js0.  By setting N here, /dev/jsN will be used in its

       -g, --gdma_cycle
              This experimental option will halt the CPU during certain DMA operations.  Leave it
              off unless you are working around problems in a certain program.

       -v, --version
              Show version of program.

       Most options can be disabled with --no-OPTION (Ex: --no-sound turn sound off)


       These  are  the default keys in the emulator.  These, along with the joystick buttons, may
       be changed through a custom gngbrc(5) file.

       Enter          : Start
       Right Shift    : Select
       W              : B
       X              : A
       TAB            : Open menu

       F9             : fullscreen on/off
       F10            : show fps
       F11            : reset
       F12            : show keysym code

       KeyPad 1-5: Change palette
              Palette must be define in your gngbrc file (see sample_gngbrc)

       KeyPad 6  : Toggle color filter


       There is some good info in the README included in the doc directory.  The gngbrc  file  is
       documented in /usr/share/doc/gngb/examples/sample_gngbrc.


       This  manual  page was written by RCU <>, for the Debian GNU/Linux
       system (but may be used by others).