Add "joystick mouse" driver and default mouse callback routine (not

using P/M graphics).

libsrc/atari/mouse_stat_stddrv.s

@@ -0,0 +1,22 @@
+;
+; Address of the static standard mouse driver
+;
+; Christian Groessler, 2014-01-02
+;
+; const void mouse_static_stddrv[];
+;
+
+        .export _mouse_static_stddrv
+        .ifdef  __ATARIXL__
+        .import _atrxjoy_mou
+        .else
+        .import _atrjoy_mou
+        .endif
+
+.rodata
+
+        .ifdef  __ATARIXL__
+_mouse_static_stddrv := _atrxjoy_mou
+        .else
+_mouse_static_stddrv := _atrjoy_mou
+        .endif