--- a/landscape.c	Fri Jan 07 17:02:43 2005 +0000
+++ b/landscape.c	Fri Jan 07 17:40:23 2005 +0000
@@ -454,8 +454,8 @@
 
 #define TILELOOP_BITS 4
 #define TILELOOP_SIZE (1 << TILELOOP_BITS)
-#define TILELOOP_ASSERTMASK ((TILELOOP_SIZE-1) + ((TILELOOP_SIZE-1) << TILE_X_BITS))
-#define TILELOOP_CHKMASK (((1 << (TILE_X_BITS - TILELOOP_BITS))-1) << TILELOOP_BITS)
+#define TILELOOP_ASSERTMASK ((TILELOOP_SIZE-1) + ((TILELOOP_SIZE-1) << MapLogX()))
+#define TILELOOP_CHKMASK (((1 << (MapLogX() - TILELOOP_BITS))-1) << TILELOOP_BITS)
 
 void RunTileLoop()
 {
@@ -538,7 +538,7 @@
 	p = GetSpritePtr((((r >> 24) * _genterrain_tbl_1[type]) >> 8) + _genterrain_tbl_2[type] + 4845);
 
 	x = r & MapMaxX();
-	y = (r >> TILE_X_BITS) & MapMaxY();
+	y = (r >> MapLogX()) & MapMaxY();
 
 
 	if (x < 2 || y < 2)

--- a/macros.h	Fri Jan 07 17:02:43 2005 +0000
+++ b/macros.h	Fri Jan 07 17:40:23 2005 +0000
@@ -70,9 +70,6 @@
 
 #define LANDSCAPE_SIZE_FACTOR 1
 
-#define TILE_FROM_XY(x,y) (int)((((y) >> 4) << TILE_X_BITS) + ((x) >> 4))
-#define TILE_XY(x,y) (int)(((y) << TILE_X_BITS) + (x))
-
 #define IS_TILETYPE(_t_, _s_) (_map_type_and_height[(_t_)] >> 4 == (_s_))
 #define GET_TILETYPE(_t_) (_map_type_and_height[(_t_)] >> 4)
 #define GET_TILEHEIGHT(_t_) ((_map_type_and_height[_t_] & 0xF) * 8)
@@ -86,7 +83,7 @@
 
 extern uint SafeTileAdd(uint x, int add, const char *exp, const char *file, int line);
 
-#if !defined(_DEBUG) || TILE_X_BITS != 8
+#if !defined(_DEBUG)
 #	define TILE_ADD(x,y) ((x)+(y))
 #else
 #	if defined(__GNUC__)

--- a/map.c	Fri Jan 07 17:02:43 2005 +0000
+++ b/map.c	Fri Jan 07 17:40:23 2005 +0000
@@ -2,6 +2,9 @@
 #include "ttd.h"
 #include "map.h"
 
+#define TILE_X_BITS 8
+#define TILE_Y_BITS 8
+
 uint _map_log_x = TILE_X_BITS;
 uint _map_log_y = TILE_Y_BITS;
 

--- a/map.h	Fri Jan 07 17:02:43 2005 +0000
+++ b/map.h	Fri Jan 07 17:40:23 2005 +0000
@@ -1,8 +1,8 @@
 #ifndef MAP_H
 #define MAP_H
 
-#define TILE_X_BITS 8
-#define TILE_Y_BITS 8
+#define TILE_FROM_XY(x,y) (int)((((y) >> 4) << MapLogX()) + ((x) >> 4))
+#define TILE_XY(x,y) (int)(((y) << MapLogX()) + (x))
 
 #define TILE_MASK(x) (int)((x) & ((1 << (MapLogX() + MapLogY())) - 1))