diff --git a/docs/instr_file.txt b/docs/instr_file.txt
new file mode 100644
index 0000000..4e4fece
--- /dev/null
+++ b/docs/instr_file.txt
@@ -0,0 +1,40 @@
+/*
+ * 
+ * MOMENT OF INERTIA STANDARD BYTECODE FILE FORMAT - .moi files
+ * 
+ * Created by Tyler Liu on 2016/09/23.
+ * Copyright © 2016 Tyler Liu. All rights reserved.
+ *
+ * PUBLISHED UNDER THE GNU GENERAL PUBLIC LICENSE v3.0.
+ *
+ * Byte -1: total instruction count
+ * pointer: point to the location of the desired byte instruction
+ *
+ * #define INERTIA_ADD 0x0 // Addition
+ * #define INERTIA_DIV 0x1 // Division
+ * #define INERTIA_MUL 0x2 // Multiplication
+ * 
+ * #define INERTIA_LTN 0x3 // Less Than
+ * #define INERTIA_EQL 0x4 // Equal To
+ * #define INERTIA_AND 0x5 // Bitwise AND
+ * #define INERTIA_NOT 0x6 // Bitwise NOT
+ * #define INERTIA_OR 0x7 //  Bitwise OR
+ * #define INERTIA_SHIFTL 0x8 //Bitwise SHIFTL
+ * #define INERTIA_SHIFTR 0x9 //Bitwise SHIFTR
+ * 
+ * #define INERTIA_PRINT 0xA // Print to stdout
+ * #define INERTIA_LOAD 0xB // Load value
+ * #define INERTIA_GOTO 0xC //goto
+ * #define INERTIA_IF 0xD //if reg1 = false, skip to reg2
+ * #define INERTIA_RETURN 0xE //return
+ * #define INERTIA_CALL 0xF // call function
+ * 
+ * //0 as memory, 1 as register, 2 as const
+ *
+ * instruction set as the first 4 bits
+ * type of input as following 2 bits, 2*3 = 6 bits
+ * field for register as following 2 bits, 2*3 = 6bits
+ * field for memory as folloing 16 bits, 16 + 16* 2 = 48 bits, later two in second unsigned
+ * field for const as following unsigned, optional(does not need without use of it). 
+ */
+