diff --git a/README.md b/README.md
index 5776565..62c0779 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,50 @@
-# r16
\ No newline at end of file
+# r16
+
+| number | instruction | argument 1 | argument 2 | explanation                                       |
+|-------:|:-----------:|:----------:|:----------:|---------------------------------------------------|
+|   0x00 |     HLT     |            |            | halts the CPU                                     |
+|   0x01 |     ADD     |   value 1  |   value 2  | ACU = value 1 + value 2                           |
+|   0x02 |     SUB     |   value 1  |   value 2  | ACU = value 1 - value 2                           |
+|   0x03 |     MUL     |   value 1  |   value 2  | ACU = value 1 * value 2                           |
+|   0x04 |     DIV     |   value 1  |   value 2  | ACU = value 1 / value 2                           |
+|   0x05 |     LBS     |    value   |   amount   | ACU = value << amount                             |
+|   0x06 |     RBS     |    value   |   amount   | ACU = value << amount                             |
+|   0x07 |     BAN     |   value 1  |   value 2  | ACU = value 1 & value 2                           |
+|   0x08 |     BOR     |   value 1  |   value 2  | ACU = value 1 \| value 2                          |
+|   0x09 |     BXO     |   value 1  |   value 2  | ACU = value 1 ^ value 2                           |
+|   0x0A |     BNO     |    value   |            | ACU = ~ value                                     |
+|   0x0B |     PUS     |    value   |            | pushes value onto the stack                       |
+|   0x0C |     POP     |            |            | pops a value from the stack and stores it in ACU  |
+|   0x0D |     JMP     |   address  |            | jumps to address                                  |
+|   0x0E |     JEQ     |   address  |    value   | jumps to address, if value is equal to ACU        |
+|   0x0F |     JNZ     |   address  |    value   | jumps to address, if value is not zero            |
+|   0x10 |     CAL     |   address  |            | pushes PC + 1 to the stack, then jumps to address |
+|   0x11 |     RET     |            |            | pops value from stack and jumps to it             |
+|   0x12 |     REG     |  int type  |   address  | registers int type to address                     |
+|   0x13 |     INT     |  int type  |            | interrupts as int type                            |
+|   0x14 |     INP     |            |            | inputs a character into ACU                       |
+|   0x15 |     OUT     |    value   |            | outputs value                                     |
+|   0x16 |     DIN     |  location  |            | reads value from disk at location to ACU          |
+|   0x17 |     DOT     |  location  |    value   | writes value to disk at location                  |
+
+| Register | Usage           |
+|---------:|-----------------|
+|       R0 | general usage   |
+|       R1 | general usage   |
+|       R2 | general usage   |
+|       R3 | general usage   |
+|      ACU | Accumulator     |
+|       PC | Program Counter |
+|       SP | Stack Pointer   |
+
+|  Area of RAM  | reserved | usage             |
+|:-------------:|:--------:|-------------------|
+| 00000 - 00064 |    NO    | system header     |
+| 00064 - 65263 |    NO    | executable        |
+| 65263 - 65519 |    YES   | interupt pointers |
+| 65519 - 65535 |    YES   | stack             |
+
+| BYTE 1     |             |             | BYTE 2     | BYTE 2     |
+|------------|-------------|-------------|------------|------------|
+| OPCODE     | arg 1 info  | arg 2 info  | ARGUMENT 1 | ARGUMENT 2 |
+| bit 0 - 12 | bit 12 - 14 | bit 14 - 16 | bit 0 - 16 | bit 0 - 16 |