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-rw-r--r--include/tak.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/tak.h b/include/tak.h
index 0a97c2d..1d49720 100644
--- a/include/tak.h
+++ b/include/tak.h
@@ -20,6 +20,7 @@ typedef uint8_t data_t;
typedef uint16_t colour_stack_t;
#define NUM_SHIFT 4
+#define NUM_MASK (0xF<<NUM_SHIFT) // 0b11110000
#define NUM_INC (0x1<<NUM_SHIFT) // 0b00010000
#define STONE_MASK 0b00000011
#define STONE_AT(l) (celldat[(l)] & STONE_MASK)