update README.Vita.md

Author: fgsfdsfgs

README.Vita.md

@@ -4,5 +4,73 @@
 * [This fork](https://github.com/frangarcj/vita2dlib/tree/fbo) of Vita2D;
 * [Latest release](https://github.com/frangarcj/vita-shader-collection/releases/latest) of Vita Shader Collection.
 
+Both libraries should be installed to the SDK directory (i. e. to `$(VITASDK)/arm-vita-eabi/lib` and `$(VITASDK)/arm-vita-eabi/include`).
+
 ### Build instructions
 Run `make -f Makefile.vita`. This should produce a VPK.
+
+## Using the Vita port
+### Installation
+1. Install VPK.
+2. Extract `data.zip` from the latest release to root of memory card (`ux0:`).
+3. Copy any supported IWADs (see below) you have to `ux0:/data/chocolate/iwads/`.
+
+### Launcher controls
+* LTrigger/RTrigger: select tab
+* Up/Down: select option
+* Left/Right: adjust option
+* Cross: activate option
+* Start: save settings and launch the game you have selected in the `Game` tab (in single-player mode)
+* Circle: save settings and exit launcher / cancel selection when in file select dialog
+
+Controls for a particular game can be viewed and changed in the `Buttons` and `Input` tabs.
+
+### Supported games / IWADs
+To play a game from this list, copy the corresponding files to `ux0:/data/chocolate/iwads/`.
+
+| Game                                   | File(s)        |
+|----------------------------------------|----------------|
+| Shareware Doom *                       | `doom1.wad`    |
+| Doom / Ultimate Doom                   | `doom.wad`     |
+| Doom II                                | `doom2.wad`    |
+| Final Doom: TNT Evilution              | `tnt.wad`      |
+| Final Doom: The Plutonia Experiment    | `plutonia.wad` |
+| Chex Quest                             | `chex.wad`, [`chex.deh`](https://www.doomworld.com/idgames/?file=utils/exe_edit/patches/chexdeh.zip) |
+| [FreeDoom](https://freedoom.github.io/): Phase 1                      | `freedoom.wad` |
+| FreeDoom: Phase 2                      | `freedoom2.wad`|
+| FreeDM                                 | `freedm.wad`   |
+| Shareware Heretic *                    | `heretic1.wad` |
+| Heretic / Shadow of the Serpent Riders | `heretic.wad`  |
+| Hexen                                  | `hexen.wad`    |
+| Strife                                 | `strife1.wad`, optionally `voices.wad`   |
+
+\* included in `data.zip` for the latest Vita release
+
+### Loading PWADs (and other custom game files)
+Put all custom files for a given game into `ux0:/data/chocolate/pwads/<gamedir>`, where `<gamedir>` is `doom` for all Doom games, `heretic` for Heretic and Shareware Heretic, `hexen` for Hexen and `strife` for Strife, then use the `Custom` tab in the launcher to select any custom content you want.
+
+### Recording demos
+When `Record demo` is set to `On`, the demo is saved to `ux0:/data/chocolate/tmp/mydemo.lmp`.
+
+### Notes
+If the game closes without producing a crash dump or an error message, a file named `ux0:/data/chocolate/i_error.log` should be generated, which contains error messages.
+
+The IP address that appears in the `Game address` field of the `Net` tab of the launcher when you run it is your Vita's LAN IP. You can use this if autojoin doesn't work properly.
+
+To join a game by IP, select `Game address`, enter the address, then hit `Connect to address`.
+
+Netgames will only work correctly if all players have selected the same game and set of custom files (stuff in the `Files` tab). PWAD order does matter. The game will complain upon connecting if you did something wrong.
+
+The `Merge file` option is the launcher version of the `-merge` command line option. See the Chocolate Doom wiki for more details.
+
+You can specify custom command line parameters in a [response file](https://doomwiki.org/wiki/Parameter#.40), then load it using the `Override response file` option. Don't forget to select the correct game.
+
+## Credits
+- [these people](https://github.com/chocolate-doom/chocolate-doom/blob/master/AUTHORS) for Chocolate Doom itself;
+- Vita SDK Team for the Vita SDK;
+- rsn8887 and cpasjuste for the SDL2 port;
+- rsn8887 for the SDL_net port, some graphics-related code and testing;
+- frangarcj for Vita Shader Collection and the FBO fork of Vita2D;
+- tiduscrying for the LiveArea assets;
+- KINGGOLDrus for some launcher graphics;
+- everyone on the #henkaku and #vitasdk IRC channels for help and/or testing.