--- /dev/null
+/********************************************************************
+/********************************************************************
+/ CONSTAND DEFINITIONS
+
+/*************************************************
+/ DISPLAY (HIGH LEVEL) RELATED STUFF
+ DCLEAR=1 / CLEAR DISPLAY BEFORE NEXT DRAWING OPERATION
+ DFULL=1 / DRAW COMPLETE DISPLAY (NON-BLANK LOCS)
+ DUPDAT=2 / UPDATE PLAYING FIELD
+ DSTATE=4 / UPDATE STATUS DISPLAY
+ DIALOG=10 / REDRAW LAST TWO SCREEN LINES ON UPDATE
+