diff --git a/src/Model01.h b/src/Model01.h
index 123304c7..d9f7c4d9 100644
--- a/src/Model01.h
+++ b/src/Model01.h
@@ -48,6 +48,74 @@ class Model01 {
 
 };
 
+#define SCANBIT(row,col) (1 << (row * 8 + (7 - col)))
+
+#define R0C0  SCANBIT(0, 0)
+#define R0C1  SCANBIT(0, 1)
+#define R0C2  SCANBIT(0, 2)
+#define R0C3  SCANBIT(0, 3)
+#define R0C4  SCANBIT(0, 4)
+#define R0C5  SCANBIT(0, 5)
+#define R0C6  SCANBIT(0, 6)
+#define R0C7  SCANBIT(0, 7)
+#define R1C0  SCANBIT(1, 0)
+#define R1C1  SCANBIT(1, 1)
+#define R1C2  SCANBIT(1, 2)
+#define R1C3  SCANBIT(1, 3)
+#define R1C4  SCANBIT(1, 4)
+#define R1C5  SCANBIT(1, 5)
+#define R1C6  SCANBIT(1, 6)
+#define R1C7  SCANBIT(1, 7)
+#define R2C0  SCANBIT(2, 0)
+#define R2C1  SCANBIT(2, 1)
+#define R2C2  SCANBIT(2, 2)
+#define R2C3  SCANBIT(2, 3)
+#define R2C4  SCANBIT(2, 4)
+#define R2C5  SCANBIT(2, 5)
+#define R2C6  SCANBIT(2, 6)
+#define R2C7  SCANBIT(2, 7)
+#define R3C0  SCANBIT(3, 0)
+#define R3C1  SCANBIT(3, 1)
+#define R3C2  SCANBIT(3, 2)
+#define R3C3  SCANBIT(3, 3)
+#define R3C4  SCANBIT(3, 4)
+#define R3C5  SCANBIT(3, 5)
+#define R3C6  SCANBIT(3, 6)
+#define R3C7  SCANBIT(3, 7)
+
+#define R0C8  SCANBIT(0, 0)
+#define R0C9  SCANBIT(0, 1)
+#define R0C10 SCANBIT(0, 2)
+#define R0C11 SCANBIT(0, 3)
+#define R0C12 SCANBIT(0, 4)
+#define R0C13 SCANBIT(0, 5)
+#define R0C14 SCANBIT(0, 6)
+#define R0C15 SCANBIT(0, 7)
+#define R1C8  SCANBIT(1, 0)
+#define R1C9  SCANBIT(1, 1)
+#define R1C10 SCANBIT(1, 2)
+#define R1C11 SCANBIT(1, 3)
+#define R1C12 SCANBIT(1, 4)
+#define R1C13 SCANBIT(1, 5)
+#define R1C14 SCANBIT(1, 6)
+#define R1C15 SCANBIT(1, 7)
+#define R2C8  SCANBIT(2, 0)
+#define R2C9  SCANBIT(2, 1)
+#define R2C10 SCANBIT(2, 2)
+#define R2C11 SCANBIT(2, 3)
+#define R2C12 SCANBIT(2, 4)
+#define R2C13 SCANBIT(2, 5)
+#define R2C14 SCANBIT(2, 6)
+#define R2C15 SCANBIT(2, 7)
+#define R3C8  SCANBIT(3, 0)
+#define R3C9  SCANBIT(3, 1)
+#define R3C10 SCANBIT(3, 2)
+#define R3C11 SCANBIT(3, 3)
+#define R3C12 SCANBIT(3, 4)
+#define R3C13 SCANBIT(3, 5)
+#define R3C14 SCANBIT(3, 6)
+#define R3C15 SCANBIT(3, 7)
+
 
 #define LED_COUNT 64