4 files changed, 16 insertions, 15 deletions
diff --git a/apps/plugins/chessbox/Makefile b/apps/plugins/chessbox/Makefile
index be75b2c5e1..05b6d8f6a7 100644
--- a/apps/plugins/chessbox/Makefile
+++ b/apps/plugins/chessbox/Makefile
@@ -9,7 +9,7 @@
 
 INCLUDES = -I$(APPSDIR) -I.. -I. -I$(FIRMDIR)/include -I$(FIRMDIR)/export \
  -I$(FIRMDIR)/common -I$(FIRMDIR)/drivers -I$(OUTDIR) -I$(BUILDDIR)
-CFLAGS = $(GCCOPTS) -O3 $(INCLUDES) $(TARGET) $(EXTRA_DEFINES) \
+CFLAGS = $(GCCOPTS) $(INCLUDES) $(TARGET) $(EXTRA_DEFINES) \
  -DTARGET_ID=$(TARGET_ID) -DMEM=${MEMORYSIZE} -DPLUGIN
 
 ifdef APPEXTRA
@@ -109,4 +109,3 @@ clean:
 	@rm -f $(OBJDIR)/chessbox.* $(DEPFILE)
 
 -include $(DEPFILE)
-
diff --git a/apps/plugins/chessbox/chessbox.c b/apps/plugins/chessbox/chessbox.c
index d16497dc6a..0d145ec00a 100644
--- a/apps/plugins/chessbox/chessbox.c
+++ b/apps/plugins/chessbox/chessbox.c
@@ -31,9 +31,6 @@ struct cb_command {
 	unsigned short mv;
 };
 
-/* global rockbox api */
-static struct plugin_api* rb;
-	
 /* External bitmaps */
 extern const fb_data chessbox_pieces[];
 
@@ -43,13 +40,13 @@ PLUGIN_HEADER
 /* button definitions */
 #if (CONFIG_KEYPAD == IPOD_3G_PAD) || (CONFIG_KEYPAD == IPOD_4G_PAD)
 #define CB_SELECT  BUTTON_SELECT
-#define CB_UP      BUTTON_SCROLL_BACK
-#define CB_DOWN    BUTTON_SCROLL_FWD
+#define CB_UP      BUTTON_MENU
+#define CB_DOWN    BUTTON_PLAY
 #define CB_LEFT    BUTTON_LEFT
 #define CB_RIGHT   BUTTON_RIGHT
-#define CB_PLAY    BUTTON_PLAY
-#define CB_LEVEL   BUTTON_MENU
-#define CB_QUIT    BUTTON_REL
+#define CB_PLAY    (BUTTON_SELECT | BUTTON_PLAY)
+#define CB_LEVEL   (BUTTON_SELECT | BUTTON_RIGHT)
+#define CB_QUIT    (BUTTON_SELECT | BUTTON_MENU)
 
 #elif CONFIG_KEYPAD == IAUDIO_X5_PAD
 #define CB_SELECT  BUTTON_MENU
diff --git a/apps/plugins/chessbox/gnuchess.c b/apps/plugins/chessbox/gnuchess.c
index ed4a7f2a0f..45ca66e778 100644
--- a/apps/plugins/chessbox/gnuchess.c
+++ b/apps/plugins/chessbox/gnuchess.c
@@ -66,7 +66,7 @@
 #define taxicab(a,b) (abs(column[a]-column[b]) + abs(row[a]-row[b]))
 
 /* ---- RockBox datatypes and variables */
-static struct plugin_api* rb;
+struct plugin_api* rb;
 
 /* ---- Chess datatypes and variables ---- */
 struct leaf
@@ -332,8 +332,7 @@ short pscore[3];
   xside = otherside[side];
   pscore[white] = pscore[black] = 0;
 
-  /* ok, I will yield here although this function will be called much more
-  many times than needed I think */
+  /* ok, I will yield here for lower levels */
   rb->yield();
 
   for (c1 = white; c1 <= black; c1++)
@@ -1238,6 +1237,9 @@ short xside,pbst,d,e,cf,score,rcnt;
 unsigned short mv,nxtline[maxdepth];
 struct leaf *node,tmp;
 
+  /* ok, I will yield here for higher levels */
+  rb->yield();
+
   NodeCnt++;
   xside = otherside[side];
   
@@ -2353,7 +2355,7 @@ void GNUChess_Initialize ( void ) {
   /*ttable = (struct hashentry *)malloc(ttblsz *
            (unsigned long)sizeof(struct hashentry));*/
   buffer_size = ttblsz * sizeof(struct hashentry);
-  ttable = rb->plugin_get_buffer( &buffer_size );
+  ttable = (struct hashentry *)rb->plugin_get_buffer( &buffer_size );
   Level = 1;
   OperatorTime = 0;
   TCmoves = 60;
diff --git a/apps/plugins/chessbox/gnuchess.h b/apps/plugins/chessbox/gnuchess.h
index 6ea77dc00b..68ef9f9a81 100644
--- a/apps/plugins/chessbox/gnuchess.h
+++ b/apps/plugins/chessbox/gnuchess.h
@@ -19,7 +19,7 @@
 #define valueQ 1100
 #define valueK 1200
 
-
+/* ---- chess system global variables ---- */
 extern short mate,opponent,computer;
 extern short locn[8][8];
 extern short board[64];
@@ -27,7 +27,10 @@ extern short color[64];
 extern long Level;
 extern short TCflag,TCmoves,TCminutes;
 
+/* ---- RockBox integration ---- */
+extern struct plugin_api* rb;
 
+/* ---- The beginning of a GNUChess v2 APIfication ---- */
 void SetTimeControl(void);
 void GNUChess_Initialize(void);
 int VerifyMove(char s[],short iop,unsigned short *mv);