From a1cd9d2ec17dc2d3f0d0aa0037ef45bbe4421d44 Mon Sep 17 00:00:00 2001
From: Lars Brinkhoff <lars@nocrew.org>
Date: Tue, 3 May 2016 14:52:32 +0200
Subject: [PATCH] Contribution Guideline.

---
 README.md       |  2 ++
 contributing.md | 10 ++++++++++
 2 files changed, 12 insertions(+)
 create mode 100644 contributing.md

diff --git a/README.md b/README.md
index 730848b..076182e 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 This repository contains the documentations for various CPUs. It contain data sheets, programmer's manuals, quick reference cards, and the like.
 
+Before submitting a pull request, [Contribution Guildelines](contributing.md).
+
 | Subfolders | Description |
 | ---------- | ----------- |
 | 8085 | Intel 8085 |
diff --git a/contributing.md b/contributing.md
new file mode 100644
index 0000000..56be535
--- /dev/null
+++ b/contributing.md
@@ -0,0 +1,10 @@
+## Contibution Guidelines
+
+Documentation for new CPUs or MCUs are happily accepted.  It's
+preferred to add processor family architecture documents.  
+
+The GitHub 1G size limit on repositories is a concern.  If a
+subdirectory grows large, please add it as a git submodule.  The
+submodule repository should belong to the
+[awesome-cpus](https://github.com/awesome-cpus) origanization.
+Everyone are welcome to join.