#define CHUNK_FLAGS_MASK 0x00FF0000
#define CHUNK_FLAGS_SHIFT 16
-#define CHUNK_UBIT_MASK 0x000F0000
+#define CHUNK_UBIT_MASK 0x00040000
#define CHUNK_UBIT_SHIFT 18
-#define CHUNK_BBIT_MASK 0x000F0000
+#define CHUNK_BBIT_MASK 0x00020000
#define CHUNK_BBIT_SHIFT 17
-#define CHUNK_EBIT_MASK 0x000F0000
+#define CHUNK_EBIT_MASK 0x00010000
#define CHUNK_EBIT_SHIFT 16
#define CHUNK_LENGTH_MASK 0x0000FFFF