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DGEN(1)			FreeBSD	General	Commands Manual		       DGEN(1)

     dgen -- Sega Genesis/Mega Drive emulator

     dgen [-Pfhmv] [-R (J|U|E)]	[-H HZ]	[-D DEMONAME] [-d DEMONAME] [-n	USEC]
	  [-p CODE,CODE...] [-r	RCFILE]	[-X XFACT] [-Y YFACT] [-S FACT]
	  [-g (0|1)] [-G XxY] [-s SLOT]	[romname [...]]

     The ROM image in the file romname is executed, as emulated	on a Sega Gen-
     esis or Mega Drive	running	in 60Hz	NTSC mode (unless the -P option	is
     specified,	in which case 50Hz PAL mode is used).  romname should be in
     raw binary	or SMD format, and may be compressed with gzip(1), zip(1), or

     When romname isn't	specified, DGen	starts without a ROM. It can be	loaded
     later from	the prompt. When more than a single romname is specified, they
     are executed sequentially.

     The options are as	follows:

     -H	HZ	 Use a custom frame rate, can be used to accelerate or slow
		 down emulation.

     -P		 Emulate 50Hz PAL mode (as used	in European models of the Mega

     -R	(J|U|E)	 Emulator region. Without this option, DGen uses the first re-
		 gion mentioned	in the ROM header. It should be	combined with
		 -P for	PAL mode. See below.

		 (none)	     Autodetect	(NTSC, 60Hz)

		 -P	     Autodetect	(PAL, 50Hz)

		 -R J	     Japan (NTSC, 60Hz)

		 -R J -P     Japan (PAL, 50Hz)

		 -R E	     Europe (NTSC, 60Hz, music will certainly play too

		 -R E -P     Europe (PAL, 50Hz)

		 -R U	     America (NTSC, 60Hz)

		 -R U -P     Same as -R	E -P

     -f		 Run fullscreen, if possible.

     -h		 Show a	brief synopsis of all options.

     -m		 MinGW only. This option prevents DGen from detaching from its
		 control console.

     -v		 Show the version number, and exit.

		 Play back a demo recorded with	the -d option.

     -d	DEMONAME
		 Record	a demo of the program running, which can be later re-
		 played	with the -D switch.

     -n	USEC	 Sleep for a number of microseconds after every	frame, to give
		 time to other processes.

     -p	CODE,CODE...
		 Modify	the ROM	image in memory, using Game Genie or Hex style
		 codes.	Game Genie codes are of	the form ABCD-EFGH and Hex
		 codes are in the form 123456:ABCD.  To	specify	more than one
		 code, separate	them with commas (do not use spaces).

     -r	RCFILE	 Parse another rc file after $HOME/.dgen/dgenrc. Values	in the
		 specified file	override those in the preceding	files.

     -X	XFACT	 Scale the window XFACT	times in the X direction. XFACT	must
		 be a positive integer.

     -Y	YFACT	 Scale the window YFACT	times in the Y direction. YFACT	must
		 be a positive integer.

     -S	FACT	 Scale the window FACT times in	both directions. FACT must be
		 a positive integer.

     -g	(0|1)	 Enable/disable	OpenGL (if compiled-in).

     -G	XxY	 Desired window	size (e.g. 640x480, 800x600, etc.)

     -s	SLOT	 Load the saved	state from the given slot at startup (0-9)

     A minimalist interactive prompt inspired from vi(1) can be	used to	per-
     form various operations described below. It is triggered by pressing
     colon (:),	the default key. Command-line editing, history and completion
     are supported.

     {quit, exit, q}
	   Quit, or load the next romname from command-line, if	any.

     {load, open, plug,	o} filename
	   Load	a given	ROM filename.

     {unload, close, unplug}
	   Unload the current ROM.

     config_load filename
	   Load	configuration from file	filename.

     config_save filename
	   Save	current	configuration to file filename.

	   Genesis reset.

     {ctv_push,	ctv_pop, ctv_none}
	   Manage the stack of Crap TV filters (if compiled-in).

     calibrate number
	   Interactive calibration of the specified gamepad (1 or 2). If
	   number isn't	specified, default to 1.

     unbind binding [...]
	   Remove specified bindings (variables	prefixed with "bind_").	 See
	   dgenrc(5) for more information about	them.

     vgmdump start filename

     vgmdump stop
	   Manages VGM dumping/logging.	If the second argument is start	VGM
	   dumping will	be started at the path specified by the	third argu-
	   ment.  If the second	argument is stop VGM dumping will be stopped
	   and the dump	finalized.

     All configuration variables from dgenrc(5)	can be displayed and modified
     interactively, with immediate effect.

     {int_name,	bool_name, key_name, joy_name, ...} {value}
	   Affect value	to variable name.

     {int_name,	bool_name, key_name, joy_name, ...}
	   Display current value for variable name.

     $HOME/.dgen/dgenrc	       Contains	user settings for the emulator.
     $HOME/.dgen/   Generated file containing saved user settings.
     $HOME/.dgen/saves/*       Save states generated by	the emulator.
     $HOME/.dgen/ram/*	       Battery-backup RAM images, generated by the em-
			       ulator for ROMs with save RAM.
			       Screenshots are generated there.
     $HOME/.dgen/roms/*	       ROMs default search path.
     $HOME/.dgen/demos/*       Demos default search path.

     gzip(1), bzip2(1),	zip(1),	dgenrc(5)

     This manual page was written by Joe Groff <>.
     Updated by	zamaz <>.

     There are known emulation bugs, see BUGS in DGen source package.

     Report bugs to <>.

FreeBSD	13.0			 July 26, 2014			  FreeBSD 13.0


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