Add documentation for Switch build

README.md

@@ -56,6 +56,11 @@ To use the Emscripten build, check out https://github.com/kichikuou/web and copy
 ### Android
 
 See [android/README.md](android/).
+To use the Emscripten build, check out https://github.com/kichikuou/web and copy `out/wasm/system3.*` into its `docs` directory.
+
+### Nintendo Switch
+
+See [switch/README.md](switch/README.md).
 
 ## Running
 Usage:
@@ -85,6 +90,9 @@ The first line is not used, because track 1 of game CD is usually a data track.
 #### `-fm`
 Use FM tone generator emulation. If not specified, MIDI sound is used.
 
+#### `-timiditycfg` _filename_
+Specified a specific configuration file in a [format for TiMidity](https://manpages.ubuntu.com/manpages/bionic/en/man5/timidity.cfg.5.html) to use (used in some platforms by SDL_Mixer).
+
 #### `-game` _game_id_
 Since System1-3 behave slightly differently depending on the game, `system3` uses fingerprint of the scenario file (ADISK.DAT) to determine which game you are playing. This option allows you to override this. This is useful when running patched games.
 

switch/README.md

@@ -0,0 +1,25 @@
+# System3 for Switch
+
+## Build
+Prerequisites:
+- CMake >=3.20
+- devkitPro environment ([how to install](https://devkitpro.org/wiki/devkitPro_pacman]))
+- Nintendo Switch development tools package (switch-dev)
+- SDL2, SDL2_Mixer and SDL2_ttf Switch ports (switch-sdl2, switch-sdl2_ttf, switch-sdl2_mixer)
+
+```sh
+git submodule update --init
+sudo (dkp-)pacman -S switch-dev switch-sdl2 switch-sdl2_ttf switch-sdl2_mixer
+mkdir -p out/debug
+cd out/debug
+/opt/devkitpro/portlibs/switch/bin/aarch64-none-elf-cmake -DCMAKE_BUILD_TYPE=Debug ../../src/
+make
+```
+
+## Use
+1. Copy the resulting `system3.nro` file to a folder inside your Nintendo Switch's SD card (eg. `/switch/[game name]/`)
+2. Copy all the game files, BGM files and configuration.
+3. Open system3 through the Homebrew Launcher
+
+## Notes
+- The Switch needs its own MIDI Sound Library (eg. freepats, configurable through `timiditycfg` on the `system3.ini` config) due to the lack of built-in MIDI files.