Mapper 437: Use value instead of address.

src/boards/437.c

@@ -33,7 +33,7 @@ static void Mapper437_Sync(void) {
 }
 
 static DECLFW(Mapper437_WriteOuterBank) {
-	latch =latch &7 | A <<3;
+	latch =latch &7 | V <<3;
 	Mapper437_Sync();
 }