Add debugger documentation
diff --git a/docs/content/debugger.md b/docs/content/debugger.md
new file mode 100644
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+++ b/docs/content/debugger.md
@@ -0,0 +1,45 @@
+@parent = page.html
+@title = Debugger
+
+# Debugger commands
+
+These are the commands that the debugger CLI supports. Due to the asynchronous nature
+of the debugger and emulator, commands can be run even while the emulator is actively
+executing the program. For instance, try running the `disco.asm` <a href="/examples.html">
+example</a> and typing `set A #$0` into the debugger while it's running with a screen
+attached, you will be able to modify the program in real time!
+
+<br>
+Or, run the emulator on an empty file, and run `set $200 #$FF` to write to the frame
+buffer. You can even draw a picture by hand using just the debugger!
+
+<br>
+The GUI debugger actually just sends commands like these to the emulator using a
+message queue, and you can do the same. Look in `/dev/mqueue` for the message queue
+the emulator is using, and try sending a debug command as a null-terminated string
+to the queue, you should be able to interact with the emulator from a different
+process in real time.
+
+#### `step`, `s`
+
+Step through one CPU instruction
+
+#### `show [$addr]`, `print [$addr]`
+
+Show the value at `$addr` in memory, or, if no address given, show value of all registers.
+
+#### `set $addr #$val`, `set reg #$val`
+
+Set either `$addr` or register `reg` to `#$val`.
+
+#### `run`
+
+Run the emulator.
+
+#### `pause`
+
+Stop running the emulator.
+
+#### `quit`, `exit`
+
+Quit the debugger, emulator, and the screen (if running).
diff --git a/docs/live-reload.sh b/docs/live-reload.sh
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+#!/bin/sh
+
+find | entr bash build.sh
diff --git a/docs/templates/page.html b/docs/templates/page.html
index 71c5aa8..fd7af85 100644
--- a/docs/templates/page.html
+++ b/docs/templates/page.html
@@ -23,6 +23,7 @@
<li><a href="/usage.html">Basic usage</a></li>
<li><a href="/examples.html">Example programs</a></li>
<li><a href="/building.html">Building from source</a></li>
+ <li><a href="/debugger.html">Debugger commands</a></li>
</ul>
</div>
<div class="body">