added some documentation stubs for clients

git-svn-id: https://zerberus.eonerc.rwth-aachen.de:8443/svn/s2ss/trunk@104 8ec27952-4edc-4aab-86aa-e87bb2611832

documentation/Clients.md

@@ -1,6 +1,7 @@
 # Clients
 
 @subpage gtfpga
+@subpage opal
 
 Every server needs clients which they serve. In case of S2SS these clients are called _nodes_.
 

documentation/GTPGA.md

@@ -1,3 +0,0 @@
-# GTFPGA {#gtfpga}
-
-Hallo :-)

documentation/Server.md

@@ -0,0 +1,3 @@
+# Server {#server}
+
+@todo Move documentation from Mainpage to Server.

documentation/clients/GTFPGA.md

@@ -0,0 +1,11 @@
+# GTFPGA {#gtfpga}
+
+The GTFPGA card is an extension card for simulator racks from RTDS.
+The manufacturer provides a VHDL module to exchange data via fiber optics between the GTFPGA and GPC cards.
+
+The GTFPGA card is based on the Xilinx ML507 evaluation board.
+This board consists of a Virtex 5 FPGA, Ethernet and Fiberoptic MACs and an integrated PowerPC core.
+
+The PowerPC core is used to forward values between RTDS and the S2SS server.
+
+@todo Add documentation for GTFPGA card.

documentation/clients/OPAL.md

@@ -0,0 +1,3 @@
+# OPAL-RT {#opal}
+
+@todo Complete documentation for the OPAL-RT Simulink module.