LeapFrog Pollux Platform: sdlDoom

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This is a quick tutorial on getting sdlDoom up and running.


Set Up Build Environment

Install libSDL

2.6.31 Kernel Frame Buffer

Software Needed

sdlDoom Sources

sdlDoom Wad File

You will also need the SDL libs/headers on your host PC

sdlDoom Preconfigured (git repo) Just compile.

Hardware Needed

Console Access

Configure and Compile

Download and extract the source files.

You'll need to fix some button mappings edit doomdef.h

#define KEY_ESCAPE 109 // 'home button'
#define KEY_ENTER 120 // 'brightness button'

To get sound working a bit better as there is a possible sample rate issue, edit i_sound.c and change line 56:

#define SAMPLERATE 44100

Make sure your Build Environment is set up and run the configure program then make. Change -j5 to reflect the number of cores on your cpu +1:

make -j5

Copy the doom file to /usr/bin on your device

Copy the wad file to a folder on your device, somewhere like /LF/Bulk/doom on the Explorers or /Didj/doom on the Didj.

This will allow control for all things but shooting, to configure we need to make a config file.

Browse to the folder where you put the wad file and make a blank text file called doomconfig:

# echo > doomconfig

Run doom, using the following on the command line:

doom -config doomconfig

Load a new game, run around and pick up something (not sure if this is entirely necessary), go to the menu and save the game, doomconfig should now be populated.

Edit doomconfig, change these 2 lines to the following:

key_fire  97
key_use   98

Alternatively you can copy and paste the following into your doomconfig file replacing anything that's in there, A= fire, B=use, R should = strafe right, weapon switching doesn't currently work, nor does strafe left or backwards:

mouse_sensitivity	5
sfx_volume		15
music_volume		15
show_messages		1
key_right		174
key_left		172
key_up			173
key_down		175
key_strafeleft		99
key_straferight	114
key_fire		97
key_use 		98
key_strafe		184
key_speed		999
use_mouse		1
mouseb_fire		0
mouseb_strafe		1
mouseb_forward	        2
use_joystick		0
joyb_fire		0
joyb_strafe		1
joyb_use		3
joyb_speed		2
screenblocks		10
detaillevel		0
snd_channels		3
usegamma		0
chatmacro0		"No"
chatmacro1		"I'm ready to kick butt!"
chatmacro2		"I'm OK."
chatmacro3		"I'm not looking too good!"
chatmacro4		"Help!"
chatmacro5		"You suck!"
chatmacro6		"Next time, scumbag..."
chatmacro7		"Come here!"
chatmacro8		"I'll take care of it."
chatmacro9		"Yes"

This will give you 'fire' on the A button and 'use' on the B button

Other buttons either don't work or don't work as expected if you try and change them via doomconfig, doomdef.h or m_misc.c (defaults get defined here if the config file isn't found), not sure why its behaving like this.