From 2a0f18e35e71289f52b3a5d17ab8d31df86ee185 Mon Sep 17 00:00:00 2001
From: rhargreaves <robert@roberthargreaves.net>
Date: Sun, 20 Jan 2019 23:21:48 +0000
Subject: [PATCH] Add real-time messages to README

---
 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/README.md b/README.md
index e6fa1fce..b2b79ff1 100644
--- a/README.md
+++ b/README.md
@@ -104,6 +104,14 @@ In addition, any FM parameter change made will be sent to all FM channels.
 
 If all FM channels are busy, the note on event is dropped.
 
+## System Real-Time Messages
+
+| Status | Description  | Effect                 |
+| ------ | ------------ | ---------------------- |
+| 0xF8   | Timing Clock | Increment Beat Counter |
+| 0xFA   | Start        | None                   |
+| 0xFC   | Stop         | Reset Beat Counter     |
+
 ## Build & Test
 
 Unit & system tests are compiled and ran as x86 binaries using CMocka. Mega Drive interfaces are mocked.