diff --git a/README.md b/README.md
index fb5b443..7fb5c8d 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,42 @@
-Third time's a charm.
+# RustBoyAdvance-NG
+
+[![Build Status](https://travis-ci.com/michelhe/rustboyadvance-ng.svg?branch=master)](https://travis-ci.com/michelhe/rustboyadvance-ng)
+
+RustBoyAdvance-NG aims to be a Nintendo GameBoy Advance emulator and debugger, written in the rust programming language.
+
+RustBoyAdvance-NG currently has implemented
+  - Dumbed-down ARM mode disassembling
+  - A neat debugger REPL
+
+But the way for full emulation is way far ahead, because most of the ARM/THUMB instructions are not yet implemented.
+
+# Using the REPL
+
+You need to have rust installed, and somehow legally obtain a gba bios binary.
+Currently to test the debugger, any binary file containing arm mode instructions will do.
+
+```bash
+$ cargo run -- debug
+```
+
+No help command yet, so you can view available commands from src/debugger/mod.rs :(
+
+# Why is this project needed ?
+
+It's actually **not**. There are quite a lot of GBA emulators, and even some written in rust.
+
+I'm only doing this as a side project intended for learning rust.
+
+This is my *third* take on this project. My first go at this was about 3 years ago, but I didn't like rust much at the time so it got abandoned.
+I tried to resurrect it a year ago but didn't have the time to get invested in a side-project, let alone learning rust.
+
+I've grown to like rust a lot since then, so here we go again.
+You know what they say, *third time's a charm*.
+
+# Links
+
+- [ARM7TDMI Technical Reference Manual](http://infocenter.arm.com/help/topic/com.arm.doc.ddi0210c/DDI0210B.pdf)
+    Technical Reference Manuals are **fun**.
+- [GBATEK](http://problemkaputt.de/gbatek.htm)
+    A single webpage written by *no$gba* developer  Martin Korth.
+    This page has pretty much everything. Seriously, it's the best.
\ No newline at end of file