Added Ursula service call table.

s/Module

@@ -251,7 +251,28 @@ FinalisationCode ROUT
       ]
         Pull    "pc"
 
+
+; +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+; Table of service calls we want
+
+        ASSERT  Service_Error < Service_Reset
+
+ServiceTable
+        DCD     0
+        DCD     ServiceUrsula - ModuleStart
+        DCD     Service_Error
+        DCD     Service_Reset
+        DCD     0
+        DCD     ServiceTable - ModuleStart
+
+
+; +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+; Module service entry point
+
 ServiceCall     ROUT
+        MOV     r0, r0                                  ; Indicates there is a service call table
+
+ServiceUrsula
         CMP     r1, #Service_Reset                      ; is it reset ? EQ,CSet if so
         TEQNE   r1, #Service_Error*4,2                  ; or error ? EQ, CClear if so
         MOVNE   pc, lr