From cd703c5f6dd33e6708534f735df786453fa9712a Mon Sep 17 00:00:00 2001
From: xSmurf <xsmurf@users.noreply.github.com>
Date: Tue, 1 Nov 2016 02:34:38 +0000
Subject: [PATCH] Added known boot modes

---
 README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/README.md b/README.md
index 1cb3763..03c12ce 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,14 @@
 # MD398 Reverse Engineering
 
 Resources for the Tytera (TYT) MD398 (aka Radioddity GD-55).
+
+## Boot modes
+
+Different boot modes seem to be available:
+
+
+| PTT | TOP SIDE BUTTON | BOTTOM SIDE BUTTON | EMERGENCY BUTTON | Function |
+|:---:|:---------------:|:------------------:|:----------------:| -------- |
+| *X* |                 | *X* |    | Flip + Mirror screen | 
+|     | *X*             | *X* |    | ??? Black screen no chime, upgrade mode? |
+|     |                 | *X* | *X* | GPS Test mode |