Merge pull request #17 from elisa-tech/pahmann/system-overview

example system: ease entry to documentation

Author: pahmann

Documentation/xen-demo-zcu102/Readme.md

@@ -1,4 +1,27 @@
 # Table of Contents
+
+## Introduction
+
+The example system setup should illustrate the interaction of different system components
+represented by Zephyr as RTOS running on the µProcessor on top of Xen as Hypervisor, and with a Linux flavour (yocto, Debian) as an additional domain/VM next to Zepyhr. 
+
+In the example system the hardware is represented by a Xilinx ZCU102. It can also be a 
+Qemu image. The below image illustrates the essential blocks of the example system.
+
+![System Overview](images/system-overview.drawio.svg)
+
+An overview of the central elements involved in the build, as software elements, 
+hardware and peripherals (local tools) can be depicted from the system component overview
+below:
+
+![System Components Overview](images/system-components.drawio.svg)
+
+It is intended to enhance the demo to further configurations and to replace central elements 
+by adding alternative implementation for the hardware and system elements.
+
+Demo cases should be enhanced to represent real world use cases and help as an example
+to create own use case on top.
+
 ## Setup
 
 [Overview to all parts of XEN demo](overview2parts.md)