20181213

Doom from doom-ng-odroid-go branch with the following features:

• sound (thanks to @GadgetWorkbench)
• SD support for Doom.wad (thanks to @GadgetWorkbench). Full Doom works, Doom2 as well (but currently too slowly to enjoy), while Plutonia/TNT crash and run out of memory. The WAD name must (currently) be doom.wad.
• Custom key mapping, cheat codes and better weapon toggling:

Here's a release with new key bindings to improve movement (some areas require running/strafing):

• DPAD - move
• A - fire
• B - strafe + run
• Menu - toggles menu
• Volume - toggles map
• Select - switches weapons (and in future releases will also type "y")
• Start - use/Enter (open doors, push buttons)

You can also activate cheat codes with the following key combinations:

• Menu + Up - IDDQD (Invulnerability)
• Menu + Down - IDKFA (Keys + weapons)
• Menu + Left - IDCLIP (going through walls)
• Menu + Right - IDBEHOLDH (200 health)
• Volume + Up - IDBEHOLDL (lights on)
• Volume + Down - IDBEHOLDS (berserk mode)
• Volume + Left - IDBEHOLDI (invisibility) - doesn't seem to do much visually
• Volume + Right - idclev## (cycles through maps)

Weapon selection goes from current to lower weapon (e.g. rocket launcher -> chaingun) so that when you run out of bullets from your top weapon you don't switch to the fist.

Installation:

• Prepare the following directories on your SD card:

odroid/data/doom
roms/doom

• Copy doom1/2 WAD from http://www.pc-freak.net/blog/doom-1-doom-2-doom-3-game-wad-files-for-download-playing-doom-on-debian-linux-via-freedoom-open-source-doom-engine/ to odroid/data/doom. Note that currently a file called doom.wad is loaded, so make the necessary renames.
• Copy prboom.wad (https://github.com/libretro/libretro-prboom/blob/master/prboom.wad?raw=true) to odroid/data/doom
• Copy Doom-standalone.fw to odroid/firmware, hold B and restart the Odroid Go to flash it.