Flesh out the Quick Start documentation.

docs/qs.md

@@ -1,7 +1,102 @@
-TODO
+If this is you're first time using higan,
+welcome!
+Here's a brief guide to getting started:
 
-- install
-- configure inputs
-- load a game
-- connect a controller
+Install higan
+-------------
 
+On Windows,
+this should be as easy as downloading
+the latest release archive from
+[the higan homepage](https://byuu.org/emulation/higan/)
+and extracting it.
+[More information...](install/windows.md)
+
+On Linux,
+if your distribution doesn't include the latest version,
+you'll need to compile it yourself — but don't worry,
+it's not too complex.
+[More information...](install/linux.md)
+
+Configuring inputs
+------------------
+
+Once higan's installed,
+start it up.
+Open the "Settings" menu,
+and choose "Input ..."
+to open [the Input settings](interface/higan-config.md#input).
+
+higan supports a *lot* of different controllers
+for a lot of different consoles,
+so you don't need to configure everything immediately.
+For most consoles,
+it's enough to just configure
+whatever shows up in the list
+when you choose that console.
+For example,
+when you pick the Super Famicom,
+you're shown the inputs
+for a Gamepad
+in Controller Port 1.
+
+Once you've configured the controls
+just the way you want them,
+higan will remember them
+— you don't need to re-configure them
+every time you start higan,
+or every time you load a game.
+
+Load a game
+-----------
+
+From
+[the Library menu](interface/higan.md#the-library-menu),
+choose "Load ROM File ..."
+to open [a filesystem browser](interface/common.md#the-filesystem-browser),
+and choose the game you want to play.
+It will be added to
+[the Game Library](concepts/game-library.md),
+and it will start running immediately.
+
+In the future,
+if you want to play this game again,
+you can choose "Load ROM File ..." as you did before,
+or you can choose the appropriate console name
+from [the Library menu](interface/higan.md#the-library-menu),
+which will list all the games for that console
+in the Game Library.
+
+Connect a controller
+--------------------
+
+Once the game is running,
+a new menu will appear
+named after the appropriate console.
+For example,
+if you're playing Super Mario World,
+that's a Super Famicom game
+so there will be a Super Famicom menu.
+
+Open [the console menu](interface/higan.md#the-console-menu),
+and if there is a submenu for a controller port,
+make sure the port is using
+the controller you [set up previously](#configuring-inputs).
+If you configured inputs for a Gamepad in Controller Port 1,
+the Controller Port 1 submenu
+should be set to Gamepad.
+Like a real console,
+higan's controller ports
+start out with nothing plugged in,
+so if the game you're playing needs a gamepad connected,
+you'll have to connect it!
+
+This doesn't apply to handheld consoles
+like the Game Boy and WonderSwan,
+since the "controller" is always connected.
+This *does* apply to the Famicom,
+even though the Famicom's controllers are hard-wired,
+because higan uses "Famicom"
+to mean Nintendo's 8-bit home console
+in all territories,
+including the Nintendo Entertainment System.