DGENRC(5) BSD File Formats Manual DGENRC(5)
NAME
dgenrc - file containing settings for dgen(1)
SYNOPSIS
$HOME/.dgen/dgenrc
DESCRIPTION
The file $HOME/.dgen/dgenrc is parsed by dgen(1) when the emuator is
started. It is used to set controller keys, as well as other characteris-
tics of the emulation. The contents of this file may be overriden with
the contents of another similarly-formatted file, via the -r commandline
switch.
FILE FORMAT
Each rc file consists of an unlimited number of lines, which each have
the format 'fieldname = value'. A line may also be a comment, if it
begins with the hash mark (#) character.
Each fieldname is prepended by a name, which identifies the type of this
field:
key_* A key value. May be set to a key identifier listed in the KEY
INDENTIFIERS section below.
bool_* A boolean value. "false", "no", and "0" values are taken as
false, while "true", "yes", and any number except 0 are taken as
true.
int_* An integer value, greater than or equal to 0.
Some fields take special value sets, which are addressed in their respec-
tive sections. None of the field names or values are case-sensitive.
The fields fall under a few basic groups. They are listed below, with
their default values in brackets ([]):
CONTROLLERS
key_pad1_up [up]
key_pad1_down [down]
key_pad1_left [left]
key_pad1_right [right]
key_pad1_a [a]
key_pad1_b [s]
key_pad1_c [d]
key_pad1_x [q]
key_pad1_y [w]
key_pad1_z [e]
key_pad1_mode [backspace]
key_pad1_start [return]
Map keys to the first Genesis controller. Each of these fields has
a corresponding "key_pad2" field, to map to the second controller.
bool_joystick [false]
Use joysticks to emulate the controllers. Note that the keyboard
keys will still work if this value is set. This field is only
available if you have joystick support enabled.
joypadX_bY
Maps button number Y, on joystick X to a Genesis controller button.
Valid button values are "a", "b", "c", "x", "y", "z", "mode", and
"start". Joystick 1 will always emulate controller 1, and joystick
2 will always emulate controller 2.
AUDIO
bool_sound [true]
Enable the sound subsystem.
int_soundrate [22050]
Sound frequency to play at, in hertz (Hz).
bool_16bit [true]
Use 16-bit sound. If this is false, sound will be condensed to
8-bit (which causes a speed penalty).
int_soundsegs [8]
Number of sound segments to use for sound buffering. Choosing a
lower value will lower the sound latency, but may cause performance
to hiccup if set too low. Should be a power of two from 4 to 32.
VIDEO
bool_opengl [false]
Use the OpenGL renderer, if it is available.
int_opengl_width [640]
The width of the OpenGL window to use.
int_opengl_height [480]
The height of the OpenGL window to use.
bool_fullscreen [false]
Try to run fullscreen, if possible.
int_scale [1]
Amount by which to scale the window from the default 320x240 reso-
lution. This does not affect the OpenGL renderer; it only has
effect if the software renderer is in use.
key_fullscreen_toggle [alt-enter]
Key to toggle fullscreen mode (this may do nothing if SDL doesn't
support fullscreen toggling on your platform.)
SAVE STATES
key_slot_X [X]
Sets the current save-state slot to number X.
key_save [f2]
Saves state to the current slot.
key_load [f3]
Loads state from the current slot.
MISCELLANEOUS KEYS
key_fix_checksum [f1]
Fixes the checksum value. Some older games will freeze with a red
screen if the ROM has been hacked or modified with Game Genie
codes. If it does, pressing this, and resetting should fix the
problem.
key_quit [escape]
Exit DGen.
key_craptv_toggle [f5]
Toggles Crap-TV image filters. So far, these filters are only
available if DGen was compiled with the x86 assembly routines.
key_reset [tab]
Restart the Genesis emulation.
key_cpu_toggle [f11]
Switch CPU emulators. The x86 assembly CPU emulator StarScream is
fast, but has glitches which affect a few games. Switching to the
slower Musashi core will fix these problems, at a speed penalty.
key_stop [z]
Pause emulation, so you can concentrate on real life for a few sec-
onds. :)
key_screenshot [f12]
Take a screenshot.
PREFERENCES
bool_autoload [false]
Automatically load the saved state from slot 0 when DGen starts.
bool_autosave [false]
Automatically save the saved state to slot 0 upon exit. Setting
both of these fields true, you can exit DGen, and automatically
start a game where you left off when you start it again.
bool_frameskip [true]
Automatically skip frames, when it is necessary to maintain proper
emulation speed. This has no effect if sound is enabled, as the
sound loop skips frames automatically to maintain constant sound
speed.
bool_fullscreen [false]
Run in fullscreen mode, if it is available.
int_scale [1]
Amount by which to scale the window. Setting this to 2 will double
the dimensions of the window, 3 will triple it, and so on. It must
be a positive integer.
bool_opengl [false]
Use OpenGL mode to render the screen, if available.
int_opengl_width [640]
Width of the OpenGL resolution to use.
int_opengl_height [480]
Height of the OpenGL resolution to use.
int_nice [0]
If set to a non-zero value, DGen will call usleep(3) with the spec-
ified parameter after rendering each frame. This will slow the pro-
gram down (if it is running too fast on your computer), and allow
the operating system to reclaim some CPU time.
EXAMPLES
See the file "sample.dgenrc" in the DGen/SDL distribution.
KEY IDENTIFIERS
A key identifier can have the prefixes "shift-", "ctrl-", "alt-" and
"meta-", or any combination thereof, to require that the specified modi-
fier be pressed in combination with the key. For example, the identifier
"alt-enter" would correspond to holding down the Alt key while pressing
Enter. The numbers "0" through "9" ("kp_0" through "kp_9" for the
numeric keypad), letters "A" through "Z", and function keys "F1" through
"F12" map to their key equivalents. In addition, the following identi-
fiers map to their similarly-labeled key counterparts. Identifiers on the
same line map to the same key:
escape
backspace
tab
capslock caps_lock
lshift shift_l
rshift shift_r
lctrl ctrl_l
lmeta meta_l
lalt alt_l
ralt alt_r
rmeta meta_r
rctrl ctrl_r
return enter
space
scrollock scroll_lock
numlock num_lock
insert
home
page_up pageup
delete
end
page_down pagedown
left
right
up
down
kp_home
kp_up
kp_pageup kp_page_up
kp_left
kp_right
kp_end
kp_down
kp_pagedown kp_page_down
kp_insert
kp_delete kp_period
kp_enter
kp_divide
kp_minus
kp_multiply
kp_plus
` ~
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SEE ALSO
dgen(1)
AUTHORS
This manual page was written by Joe Groff <joe@pknet.com>.
BSD February 21, 2001 BSD
