merge PCM code from FCEUX

[fceu.git] / mappers / 25.c

diff --git a/mappers/25.c b/mappers/25.c
index f8c1d73..37e2742 100644 (file)
--- a/mappers/25.c
+++ b/mappers/25.c
@@ -16,6 +16,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * (VRC4 mapper)
  */
 
 #include "mapinc.h"
@@ -25,8 +26,19 @@
 #define K4sel mapbyte1[0]
 
 static int acount=0;
+static int weirdo=0;
 static DECLFW(Mapper25_write)
 {
+        if(A==0xC007)
+               {
+                       weirdo=8; // Ganbare Goemon Gaiden does strange things!!! at the end credits
+                             // quick dirty hack, seems there is no other games with such PCB, so
+                             // we never know if it will not work for something else lol
+                       VROM_BANK1(0x0000,0xFC);
+                       VROM_BANK1(0x0400,0xFD);
+                       VROM_BANK1(0x0800,0xFF);
+               }
+
         A=(A&0xF003)|((A&0xC)>>2);
 
         if((A&0xF000)==0xA000)
@@ -37,7 +49,10 @@ static DECLFW(Mapper25_write)
 
          K4buf[x]&=(0xF0)>>((A&2)<<1);
          K4buf[x]|=(V&0xF)<<((A&2)<<1);
-         VROM_BANK1(x<<10,K4buf[x]);
+                if(weirdo)
+         weirdo--;
+                else
+           VROM_BANK1(x<<10,K4buf[x]);
         }
         else if((A&0xF000)==0x8000)
         {