+/* screen sizes and positions for BD engine */
+
+#define TILESIZE 32
+
+extern int TILESIZE_VAR;
+
+#define TILEX TILESIZE_VAR
+#define TILEY TILESIZE_VAR
+
+extern int SCR_FIELDX, SCR_FIELDY;
+
+/* often used screen positions */
+
+extern int SX, SY;
+
+#define SXSIZE (SCR_FIELDX * TILEX)
+#define SYSIZE (SCR_FIELDY * TILEY)
+
+