rearranged the dir for github

- removed tools and pdfs
- rearranged the projects dirs
- added md files
- other minor changes

37 files changed, 0 insertions, 5539 deletions

diff --git a/projects/11/Average/Main.jack b/projects/11/Average/Main.jack
deleted file mode 100644
index d560bf1..0000000
--- a/projects/11/Average/Main.jack
+++ /dev/null
@@ -1,29 +0,0 @@
-// This file is part of www.nand2tetris.org
-// and the book "The Elements of Computing Systems"
-// by Nisan and Schocken, MIT Press.
-// File name: projects/11/Average/Main.jack
-
-// (Same as projects/09/Average/Main.jack)
-
-// Inputs some numbers and computes their average
-class Main {
-   function void main() {
-     var Array a; 
-     var int length;
-     var int i, sum;
-
-     let length = Keyboard.readInt("How many numbers? ");
-     let a = Array.new(length); // constructs the array
-     
-     let i = 0;
-     while (i < length) {
-        let a[i] = Keyboard.readInt("Enter a number: ");
-        let sum = sum + a[i];
-        let i = i + 1;
-     }
-     
-     do Output.printString("The average is ");
-     do Output.printInt(sum / length);
-     return;
-   }
-}
diff --git a/projects/11/Average/Main.vm b/projects/11/Average/Main.vm
deleted file mode 100644
index 91772b9..0000000
--- a/projects/11/Average/Main.vm
+++ /dev/null
@@ -1,147 +0,0 @@
-function Main.main 4
-push constant 18
-call String.new 1
-push constant 72
-call String.appendChar 2
-push constant 111
-call String.appendChar 2
-push constant 119
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 109
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 110
-call String.appendChar 2
-push constant 121
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 110
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 109
-call String.appendChar 2
-push constant 98
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 63
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-call Keyboard.readInt 1
-pop local 1
-push local 1
-call Array.new 1
-pop local 0
-push constant 0
-pop local 2
-label main.While0
-push local 2
-push local 1
-lt
-not
-if-goto main.EndWhile0
-push constant 16
-call String.new 1
-push constant 69
-call String.appendChar 2
-push constant 110
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 110
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 109
-call String.appendChar 2
-push constant 98
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-call Keyboard.readInt 1
-push local 0
-push local 2
-add
-pop pointer 1
-pop that 0
-push local 3
-push local 0
-push local 2
-add
-pop pointer 1
-push that 0
-add
-pop local 3
-push local 2
-push constant 1
-add
-pop local 2
-goto main.While0
-label main.EndWhile0
-push constant 15
-call String.new 1
-push constant 84
-call String.appendChar 2
-push constant 104
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 118
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 103
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 105
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push local 3
-push local 1
-call Math.divide 2
-call Output.printInt 1
-pop temp 0
-push constant 0
-return
diff --git a/projects/11/ComplexArrays/Main.jack b/projects/11/ComplexArrays/Main.jack
deleted file mode 100644
index fe51c20..0000000
--- a/projects/11/ComplexArrays/Main.jack
+++ /dev/null
@@ -1,70 +0,0 @@
-// This file is part of www.nand2tetris.org

-// and the book "The Elements of Computing Systems"

-// by Nisan and Schocken, MIT Press.

-// File name: projects/11/ComplexArrays/Main.jack

-

-/**

- * Performs several complex array processing tests.

- * For each test, the expected result is printed, along with the

- * actual result. In each test, the two results should be equal.

- */

-class Main {

-

-    function void main() {

-        var Array a, b, c;

-        

-        let a = Array.new(10);

-        let b = Array.new(5);

-        let c = Array.new(1);

-        

-        let a[3] = 2;

-        let a[4] = 8;

-        let a[5] = 4;

-        let b[a[3]] = a[3] + 3;  // b[2] = 5

-        let a[b[a[3]]] = a[a[5]] * b[((7 - a[3]) - Main.double(2)) + 1];  // a[5] = 8 * 5 = 40

-        let c[0] = null;

-        let c = c[0];

-        

-        do Output.printString("Test 1: expected result: 5; actual result: ");

-        do Output.printInt(b[2]);

-        do Output.println();

-        do Output.printString("Test 2: expected result: 40; actual result: ");

-        do Output.printInt(a[5]);

-        do Output.println();

-        do Output.printString("Test 3: expected result: 0; actual result: ");

-        do Output.printInt(c);

-        do Output.println();

-        

-        let c = null;

-

-        if (c = null) {

-            do Main.fill(a, 10);

-            let c = a[3];

-            let c[1] = 33;

-            let c = a[7];

-            let c[1] = 77;

-            let b = a[3];

-            let b[1] = b[1] + c[1];  // b[1] = 33 + 77 = 110;

-        }

-

-        do Output.printString("Test 4: expected result: 77; actual result: ");

-        do Output.printInt(c[1]);

-        do Output.println();

-        do Output.printString("Test 5: expected result: 110; actual result: ");

-        do Output.printInt(b[1]);

-        do Output.println();

-        return;

-    }

-    

-    function int double(int a) {

-    	return a * 2;

-    }

-    

-    function void fill(Array a, int size) {

-        while (size > 0) {

-            let size = size - 1;

-            let a[size] = Array.new(3);

-        }

-        return;

-    }

-}

diff --git a/projects/11/ComplexArrays/Main.vm b/projects/11/ComplexArrays/Main.vm
deleted file mode 100644
index dc83733..0000000
--- a/projects/11/ComplexArrays/Main.vm
+++ /dev/null
@@ -1,681 +0,0 @@
-function Main.main 3
-push constant 10
-call Array.new 1
-pop local 0
-push constant 5
-call Array.new 1
-pop local 1
-push constant 1
-call Array.new 1
-pop local 2
-push constant 2
-push local 0
-push constant 3
-add
-pop pointer 1
-pop that 0
-push constant 8
-push local 0
-push constant 4
-add
-pop pointer 1
-pop that 0
-push constant 4
-push local 0
-push constant 5
-add
-pop pointer 1
-pop that 0
-push local 0
-push constant 3
-add
-pop pointer 1
-push that 0
-push constant 3
-add
-push local 1
-push local 0
-push constant 3
-add
-pop pointer 1
-push that 0
-add
-pop pointer 1
-pop that 0
-push local 0
-push local 0
-push constant 5
-add
-pop pointer 1
-push that 0
-add
-pop pointer 1
-push that 0
-push local 1
-push constant 7
-push local 0
-push constant 3
-add
-pop pointer 1
-push that 0
-sub
-push constant 2
-call Main.double 1
-sub
-push constant 1
-add
-add
-pop pointer 1
-push that 0
-call Math.multiply 2
-push local 0
-push local 1
-push local 0
-push constant 3
-add
-pop pointer 1
-push that 0
-add
-pop pointer 1
-push that 0
-add
-pop pointer 1
-pop that 0
-push constant 0
-push local 2
-push constant 0
-add
-pop pointer 1
-pop that 0
-push local 2
-push constant 0
-add
-pop pointer 1
-push that 0
-pop local 2
-push constant 43
-call String.new 1
-push constant 84
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 49
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 120
-call String.appendChar 2
-push constant 112
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 100
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 53
-call String.appendChar 2
-push constant 59
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push local 1
-push constant 2
-add
-pop pointer 1
-push that 0
-call Output.printInt 1
-pop temp 0
-call Output.println 0
-pop temp 0
-push constant 44
-call String.new 1
-push constant 84
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 50
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 120
-call String.appendChar 2
-push constant 112
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 100
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 52
-call String.appendChar 2
-push constant 48
-call String.appendChar 2
-push constant 59
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push local 0
-push constant 5
-add
-pop pointer 1
-push that 0
-call Output.printInt 1
-pop temp 0
-call Output.println 0
-pop temp 0
-push constant 43
-call String.new 1
-push constant 84
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 51
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 120
-call String.appendChar 2
-push constant 112
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 100
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 48
-call String.appendChar 2
-push constant 59
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push local 2
-call Output.printInt 1
-pop temp 0
-call Output.println 0
-pop temp 0
-push constant 0
-pop local 2
-push local 2
-push constant 0
-eq
-not
-if-goto main.Else0
-push local 0
-push constant 10
-call Main.fill 2
-pop temp 0
-push local 0
-push constant 3
-add
-pop pointer 1
-push that 0
-pop local 2
-push constant 33
-push local 2
-push constant 1
-add
-pop pointer 1
-pop that 0
-push local 0
-push constant 7
-add
-pop pointer 1
-push that 0
-pop local 2
-push constant 77
-push local 2
-push constant 1
-add
-pop pointer 1
-pop that 0
-push local 0
-push constant 3
-add
-pop pointer 1
-push that 0
-pop local 1
-push local 1
-push constant 1
-add
-pop pointer 1
-push that 0
-push local 2
-push constant 1
-add
-pop pointer 1
-push that 0
-add
-push local 1
-push constant 1
-add
-pop pointer 1
-pop that 0
-label main.Else0
-push constant 44
-call String.new 1
-push constant 84
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 52
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 120
-call String.appendChar 2
-push constant 112
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 100
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 55
-call String.appendChar 2
-push constant 55
-call String.appendChar 2
-push constant 59
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push local 2
-push constant 1
-add
-pop pointer 1
-push that 0
-call Output.printInt 1
-pop temp 0
-call Output.println 0
-pop temp 0
-push constant 45
-call String.new 1
-push constant 84
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 53
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 120
-call String.appendChar 2
-push constant 112
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 100
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 49
-call String.appendChar 2
-push constant 49
-call String.appendChar 2
-push constant 48
-call String.appendChar 2
-push constant 59
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 115
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 108
-call String.appendChar 2
-push constant 116
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push local 1
-push constant 1
-add
-pop pointer 1
-push that 0
-call Output.printInt 1
-pop temp 0
-call Output.println 0
-pop temp 0
-push constant 0
-return
-function Main.double 0
-push argument 0
-push constant 2
-call Math.multiply 2
-return
-function Main.fill 0
-label fill.While0
-push argument 1
-push constant 0
-gt
-not
-if-goto fill.EndWhile0
-push argument 1
-push constant 1
-sub
-pop argument 1
-push constant 3
-call Array.new 1
-push argument 0
-push argument 1
-add
-pop pointer 1
-pop that 0
-goto fill.While0
-label fill.EndWhile0
-push constant 0
-return
diff --git a/projects/11/ConvertToBin/Main.jack b/projects/11/ConvertToBin/Main.jack
deleted file mode 100644
index e1ab941..0000000
--- a/projects/11/ConvertToBin/Main.jack
+++ /dev/null
@@ -1,84 +0,0 @@
-// This file is part of www.nand2tetris.org

-// and the book "The Elements of Computing Systems"

-// by Nisan and Schocken, MIT Press.

-// File name: projects/11/ConvertToBin/Main.jack

-

-/**

- * Unpacks a 16-bit number into its binary representation:

- * Takes the 16-bit number stored in RAM[8000] and stores its individual 

- * bits in RAM[8001..8016] (each location will contain 0 or 1).

- * Before the conversion, RAM[8001]..RAM[8016] are initialized to -1.

- * 

- * The program should be tested as follows:

- * 1) Load the program into the supplied VM emulator

- * 2) Put some value in RAM[8000]

- * 3) Switch to "no animation"

- * 4) Run the program (give it enough time to run)

- * 5) Stop the program

- * 6) Check that RAM[8001]..RAM[8016] contains the correct binary result, and

- *    that none of these memory locations contains -1.

- */

-class Main {

-    

-    /**

-     * Initializes RAM[8001]..RAM[8016] to -1,

-     * and converts the value in RAM[8000] to binary.

-     */

-    function void main() {

-	    var int value;

-        do Memory.poke(8000, 3827);

-        //do Memory.poke(8000, -7);

-        do Main.fillMemory(8001, 16, -1); // sets RAM[8001]..RAM[8016] to -1

-        let value = Memory.peek(8000);    // reads a value from RAM[8000]

-        do Main.convert(value);           // performs the conversion

-        return;

-    }

-    

-    /** Converts the given decimal value to binary, and puts 

-     *  the resulting bits in RAM[8001]..RAM[8016]. */

-    function void convert(int value) {

-    	var int mask, position;

-    	var boolean loop;

-    	

-    	let loop = true;

-    	while (loop) {

-    	    let position = position + 1;

-    	    let mask = Main.nextMask(mask);

-    	

-    	    if (~(position > 16)) {

-    	

-    	        if (~((value & mask) = 0)) {

-    	            do Memory.poke(8000 + position, 1);

-       	        }

-    	        else {

-    	            do Memory.poke(8000 + position, 0);

-      	        }    

-    	    }

-    	    else {

-    	        let loop = false;

-    	    }

-    	}

-    	return;

-    }

- 

-    /** Returns the next mask (the mask that should follow the given mask). */

-    function int nextMask(int mask) {

-    	if (mask = 0) {

-    	    return 1;

-    	}

-    	else {

-	    return mask * 2;

-    	}

-    }

-    

-    /** Fills 'length' consecutive memory locations with 'value',

-      * starting at 'startAddress'. */

-    function void fillMemory(int startAddress, int length, int value) {

-        while (length > 0) {

-            do Memory.poke(startAddress, value);

-            let length = length - 1;

-            let startAddress = startAddress + 1;

-        }

-        return;

-    }

-}

diff --git a/projects/11/ConvertToBin/Main.vm b/projects/11/ConvertToBin/Main.vm
deleted file mode 100644
index 15d63c0..0000000
--- a/projects/11/ConvertToBin/Main.vm
+++ /dev/null
@@ -1,110 +0,0 @@
-function Main.main 1
-push constant 8000
-push constant 3827
-call Memory.poke 2
-pop temp 0
-push constant 8001
-push constant 16
-push constant 1
-neg
-call Main.fillMemory 3
-pop temp 0
-push constant 8000
-call Memory.peek 1
-pop local 0
-push local 0
-call Main.convert 1
-pop temp 0
-push constant 0
-return
-function Main.convert 3
-push constant 1
-neg
-pop local 2
-label convert.While0
-push local 2
-not
-if-goto convert.EndWhile0
-push local 1
-push constant 1
-add
-pop local 1
-push local 0
-call Main.nextMask 1
-pop local 0
-push local 1
-push constant 16
-gt
-not
-not
-if-goto convert.While0.Else0
-push argument 0
-push local 0
-and
-push constant 0
-eq
-not
-not
-if-goto convert.While0.Else0.Else0
-push constant 8000
-push local 1
-add
-push constant 1
-call Memory.poke 2
-pop temp 0
-goto convert.While0.Else0.Endif0
-label convert.While0.Else0.Else0
-push constant 8000
-push local 1
-add
-push constant 0
-call Memory.poke 2
-pop temp 0
-label convert.While0.Else0.Endif0
-goto convert.While0.Endif0
-label convert.While0.Else0
-push constant 0
-pop local 2
-label convert.While0.Endif0
-goto convert.While0
-label convert.EndWhile0
-push constant 0
-return
-function Main.nextMask 0
-push argument 0
-push constant 0
-eq
-not
-if-goto nextMask.Else0
-push constant 1
-return
-goto nextMask.Endif0
-label nextMask.Else0
-push argument 0
-push constant 2
-call Math.multiply 2
-return
-label nextMask.Endif0
-function Main.fillMemory 0
-label fillMemory.While0
-push argument 1
-push constant 0
-gt
-not
-if-goto fillMemory.EndWhile0
-push argument 0
-push argument 2
-call Memory.poke 2
-pop temp 0
-push argument 1
-push constant 1
-sub
-pop argument 1
-push argument 0
-push constant 1
-add
-pop argument 0
-goto fillMemory.While0
-label fillMemory.EndWhile0
-push constant 0
-return
diff --git a/projects/11/ConvertToBin/setram.tst b/projects/11/ConvertToBin/setram.tst
deleted file mode 100644
index a33eece..0000000
--- a/projects/11/ConvertToBin/setram.tst
+++ /dev/null
@@ -1,3 +0,0 @@
-load Main.vm
-set RAM[8000] 1023;
-vmstep;
diff --git a/projects/11/JackCompiler b/projects/11/JackCompiler
deleted file mode 100755
index 2dc9b98..0000000
--- a/projects/11/JackCompiler
+++ /dev/null
diff --git a/projects/11/JackCompiler.hi b/projects/11/JackCompiler.hi
deleted file mode 100644
index 50c8c9c..0000000
--- a/projects/11/JackCompiler.hi
+++ /dev/null
diff --git a/projects/11/JackCompiler.hs b/projects/11/JackCompiler.hs
deleted file mode 100644
index bf3acfe..0000000
--- a/projects/11/JackCompiler.hs
+++ /dev/null
@@ -1,538 +0,0 @@
--- Jack Compiler, as the coursework of Project 11 of Nand2Tetris course.
--- Author: Yuchen Pei (me@ypei.me)
--- Date: 2018-01-15
-{-# LANGUAGE FlexibleContexts #-}
-import Text.Parsec.Prim
-import Text.Parsec.Char
-import Text.Parsec.Combinator
-import Data.Functor.Identity
-import Data.Either
-import Data.Maybe
-import Data.List
-import System.Environment
-import System.Directory
-import Control.Monad
-import Data.Char
-import Data.Map (Map)
-import qualified Data.Map as Map
-import Debug.Trace
-
-data JClass = JClass JIdentifier [JClassVarDec] [JSubroutineDec] deriving (Show, Eq)
-data JClassVarDec = JClassVarDec JClassVarScope JTypeAndId deriving (Show, Eq)
-data JSubroutineDec = JSubroutineDec JSubroutineHeader JSubroutineBody deriving (Show, Eq)
-data JSubroutineHeader = JSubroutineHeader JSubroutineType JTypeAndId [JTypeAndId] deriving (Show, Eq)
-data JSubroutineBody = JSubroutineBody [JTypeAndId] [JStatement] deriving (Show, Eq)
-data JStatement = JLetStatment JVarId JExpression 
-                | JIfStatement JExpression [JStatement] (Maybe [JStatement])
-                | JWhileStatment JExpression [JStatement]
-                | JDoStatement JSubroutineCall
-                | JReturnStatement (Maybe JExpression) 
-                    deriving (Show, Eq)
-data JExpression = JIntConst Int 
-           | JStrConst [Char]
-           | JKeywordConst [Char]       -- can only be true, false, null or this
-           | JExpVar JVarId
-           | JExpCall JSubroutineCall 
-           | JExpUna JUOp JExpression     -- JOp can only be - or ~ here
-           | JExpBin JExpression [(JBOp, JExpression)]
-               deriving (Show, Eq)
-data JVarId = JVarId JIdentifier (Maybe JExpression) deriving (Show, Eq)
-data JSubroutineCall = JSubroutineCall JIdentifier (Maybe JIdentifier) [JExpression] deriving (Show, Eq)
-
---data ClassTable = C [Char] Table Int deriving (Show, Eq)
-type JBOp = Char
-type JUOp = Char
-type JIdentifier = [Char]
-type JTypeAndId = (JType, JIdentifier)
-type JClassVarScope = [Char]
-type JType = [Char]
-type JSubroutineType = [Char]
-type JackParser = Parsec [Char] ()
--- For variable tables: map name (type, (seg, n))
--- For the subroutine table: map name (kind, (type, nArgs))
-type Table = Map [Char] ([Char], ([Char], Int))
-
-
-binaryOpChars = "+-*/&|<>="
-unaryOpChars = "-~"
-keywordConstStrs = ["true", "false", "null", "this"]
-primTypeStrs = ["int", "char", "boolean"]
-primTypeStrs' = primTypeStrs ++ ["void"]
-classVarScopeStrs = ["static", "field"]
-subroutineTypeStrs = ["constructor", "function", "method"]
-alphaUnderscore = ['a' .. 'z'] ++ ['A' .. 'Z'] ++ ['_']
-alphaNumUnderscore = alphaUnderscore ++ ['0'..'9']
-alphaNumUnderscoredot = '.':alphaNumUnderscore
-
-parse' parser = parse parser ""
-
-jackReader = parse' (many jSpace >> jClass)
-
-jClass :: JackParser JClass
-jClass = do
-  string "class" >> many1 jSpace
-  id <- jIdentifier
-  many jSpace >> char '{'
-  classVarDecs <- many $ try (many jSpace >> jClassVarDecs)
-  subroutineDecs <- many $ try (many jSpace >> jSubroutineDec)
-  many jSpace >> char '}'
-  return $ JClass id (mconcat classVarDecs) subroutineDecs
-
-jClassType :: JackParser [Char]
-jClassType = do 
-  x <- oneOf ['A' .. 'Z']
-  xs <- many $ oneOf alphaNumUnderscore
-  return $ x:xs
-
-jBOp :: JackParser JBOp
-jBOp = oneOf binaryOpChars
-
-jUOp :: JackParser JUOp
-jUOp = oneOf unaryOpChars
-
-jComment :: JackParser ()
-jComment = jInlineComment <|> jBlockComment
-
-jInlineComment :: JackParser ()
-jInlineComment = return () <*
-  try (string "//" >> manyTill (noneOf "\n\r") endOfLine)
-  --try (string "//" >> manyTill (noneOf "\n") newline)
-
-jSpace :: JackParser ()
-jSpace = (return () <* space) <|> jComment
-
-jBlockComment :: JackParser ()
-jBlockComment = return () <*
-  try (string "/*" >> manyTill anyChar (try $ string "*/"))
-
-jPrimType :: JackParser JType
-jPrimType = choice $ string <$> primTypeStrs
-
-jType :: JackParser JType
-jType = choice [jPrimType, jClassType]
-
-jPrimType' :: JackParser JType
-jPrimType' = choice $ string <$> primTypeStrs'
-
-jType' :: JackParser JType
-jType' = choice [jPrimType', jClassType]
-
-jClassVarScope :: JackParser JClassVarScope
-jClassVarScope = choice $ string <$> classVarScopeStrs
-
-jSubroutineType :: JackParser JSubroutineType
-jSubroutineType = choice $ string <$> subroutineTypeStrs
-
-jIdentifier :: JackParser [Char]
-jIdentifier = do
-  x <- oneOf alphaUnderscore
-  xs <- many $ oneOf alphaNumUnderscore
-  return $ x:xs
-
-jClassVarDecs :: JackParser [JClassVarDec]
-jClassVarDecs = do
-  scope <- jClassVarScope
-  many1 jSpace
-  typeAndIds <- jTypeAndIds
-  many jSpace >> char ';'
-  return $ JClassVarDec scope <$> typeAndIds
-
-jVarDecs :: JackParser [JTypeAndId]
-jVarDecs = 
-  (string "var" >> many1 jSpace) >> jTypeAndIds <* (many jSpace >> char ';')
-
-jTypeAndId :: JackParser JType -> JackParser JTypeAndId
-jTypeAndId p = do
-  type_ <- p
-  many1 jSpace
-  id <- jIdentifier
-  return (type_, id)
-
-jTypeAndIds :: JackParser [JTypeAndId]
-jTypeAndIds = do
-  type_ <- jType
-  many1 jSpace
-  ids <- sepBy jIdentifier (try $ many jSpace >> char ',' >> many jSpace)
-  return $ (\x -> (type_, x)) <$> ids
-
-jParameters :: JackParser [JTypeAndId]
-jParameters = do 
-  char '(' >> many jSpace
-  params <- sepBy (jTypeAndId jType) (try $ many jSpace >> char ',' >> many jSpace)
-  many jSpace >> char ')'
-  return params
-
-jSubroutineHeader :: JackParser JSubroutineHeader
-jSubroutineHeader = do
-  subtype <- jSubroutineType
-  many1 jSpace
-  typeAndId <- jTypeAndId jType'
-  params <- jParameters
-  return $ JSubroutineHeader subtype typeAndId params
-
-jExpression :: JackParser JExpression
-jExpression = jExpBin <|> jTerm
-
-jTerm :: JackParser JExpression
-jTerm = choice [jIntConst, jStrConst, jKeywordConst, jExpCall, jExpVar, jExpUna, jExpInBraces]
-
-jIntConst :: JackParser JExpression
-jIntConst = JIntConst <$> (read <$> many1 digit)
-
-jStrConst :: JackParser JExpression
-jStrConst = JStrConst <$> between (char '"') (char '"') (many $ noneOf "\"")
-
-jKeywordConst :: JackParser JExpression
-jKeywordConst = JKeywordConst <$> (choice $ try <$> string <$> keywordConstStrs)
-
-jExpVar :: JackParser JExpression
-jExpVar = JExpVar <$> jVarId
-
-jVarId :: JackParser JVarId
-jVarId = do
-  id <- jIdentifier
-  maybeArray <- optionMaybe $ try (char '[' >> jExpression <* char ']')
-  return $ JVarId id maybeArray
-
-jExpCall :: JackParser JExpression
-jExpCall = JExpCall <$> jSubroutineCall
-
-jExpUna :: JackParser JExpression
-jExpUna = do 
-  op <- oneOf unaryOpChars
-  many jSpace
-  x <- jTerm
-  return $ JExpUna op x
-
-jExpInBraces :: JackParser JExpression
-jExpInBraces = between (char '(') (char ')') jExpression  -- expressions like a + () is not allowed
-
-jExpBin :: JackParser JExpression
-jExpBin = try $ do
-  x <- jTerm
-  xs <- many1 jOpAndTerm
-  return $ JExpBin x xs
-
-jOpAndTerm :: JackParser (JBOp, JExpression)
-jOpAndTerm = do
-  op <- many jSpace >> jBOp
-  x <- many jSpace >> jTerm
-  return (op, x)
-
-jSubroutineDec :: JackParser JSubroutineDec
-jSubroutineDec = do
-  header <- jSubroutineHeader
-  many jSpace
-  body <- jSubroutineBody
-  return $ JSubroutineDec header body
-
-jSubroutineBody :: JackParser JSubroutineBody
-jSubroutineBody = do
-  char '{'
-  varDecs <- many $ try (many jSpace >> jVarDecs)
-  stmts <- many $ try (many jSpace >> jStatement)
-  many jSpace >> char '}'
-  return $ JSubroutineBody (mconcat varDecs) stmts
-
-jStatement :: JackParser JStatement
-jStatement = choice [jLetStatement, jIfStatement, jWhileStatement, jDoStatement, jReturnStatement]
-
-jLetStatement :: JackParser JStatement
-jLetStatement = do
-  string "let" >> many1 jSpace
-  leftVarId <- jVarId
-  many jSpace >> char '=' >> many jSpace
-  exp <- jExpression
-  many jSpace >> char ';'
-  return $ JLetStatment leftVarId exp
-
-jIfStatement = do
-  string "if" >> many jSpace >> char '(' >> many jSpace
-  exp <- jExpression
-  many jSpace >> char ')' >> many jSpace >> char '{' >> many jSpace
-  stmts <- many (try $ many jSpace >> jStatement)
-  many jSpace >> char '}'
-  stmts' <- optionMaybe $ try jElseBlock 
-  return $ JIfStatement exp stmts stmts'
-
-jElseBlock :: JackParser [JStatement]
-jElseBlock = do
-  many jSpace >> string "else" >> many jSpace >> char '{' >> many jSpace
-  stmts <- many (try $ many jSpace >> jStatement)
-  many jSpace >> char '}'
-  return stmts
-
-jWhileStatement :: JackParser JStatement
-jWhileStatement = do
-  string "while" >> many jSpace >> char '(' >> many jSpace
-  exp <- jExpression
-  many jSpace >> char ')' >> many jSpace >> char '{'
-  stmts <- many (try $ many jSpace >> jStatement)
-  many jSpace >> char '}'
-  return $ JWhileStatment exp stmts
-
-jDoStatement :: JackParser JStatement
-jDoStatement = do
-  jCall <- string "do" >> many jSpace >> jSubroutineCall 
-  many jSpace >> char ';'
-  return $ JDoStatement jCall
-
-jReturnStatement :: JackParser JStatement
-jReturnStatement = do
-  string "return" >> many jSpace
-  res <- optionMaybe $ try jExpression
-  many jSpace >> char ';'
-  return $ JReturnStatement res
-
-jSubroutineCall :: JackParser JSubroutineCall
-jSubroutineCall = try $ do
-  callee <- jIdentifier
-  method <- optionMaybe $ try (char '.' >> jIdentifier)
-  args <- emptyArgs <|> someArgs
-  return $ JSubroutineCall callee method args
-
-emptyArgs :: JackParser [JExpression]
-emptyArgs = return [] <* (try $ char '(' >> many jSpace >> char ')')
-
-someArgs :: JackParser [JExpression]
-someArgs = do
-  char '(' >> many jSpace
-  exps <- sepBy jExpression (many jSpace >> char ',' >> many jSpace)
-  many jSpace >> char ')'
-  return exps
-
-
--- vm writer starts from here
-
-buildCTable :: [JClassVarDec] -> (Table, Int)
-buildCTable xs = go 0 0 Map.empty xs
-  where go n _ t [] = (t, n)
-        go nField nStatic t ((JClassVarDec "field" (ty, jId)):ys) =
-          go (nField + 1) nStatic (Map.insert jId (ty, ("this", nField)) t) ys
-        go nField nStatic t ((JClassVarDec "static" (ty, jId)):ys) =
-          go nField (nStatic + 1) (Map.insert jId (ty, ("static", nStatic)) t) ys
-          
-
---data JClass = JClass JIdentifier [JClassVarDec] [JSubroutineDec] deriving (Show, Eq)
-buildSRTable :: [JClass] -> Table
-buildSRTable xs = Map.fromList $ mconcat $ go <$> xs where 
-  go (JClass cName _ subs) = go' <$> subs where
-    go' (JSubroutineDec (JSubroutineHeader kind (ty, sName) args) _) = 
-      (cName ++ "." ++ sName, (kind, (ty, nArgs))) where
-        nArgs = length args + if kind == "method" then 1 else 0
-
-buildLTable :: Bool -> [JTypeAndId] -> [JTypeAndId] -> Table
-buildLTable isMethod args lcls = 
-  (go "argument" args (if isMethod then 1 else 0) Map.empty) `Map.union` (go "local" lcls 0 Map.empty) where
-    go _ [] _ t = t
-    go kind ((ty, name):xs) n t = go kind xs (n + 1) $ Map.insert name (ty, (kind, n)) t
-       
---data JSubroutineDec = JSubroutineDec JSubroutineHeader JSubroutineBody deriving (Show, Eq)
---data JSubroutineHeader = JSubroutineHeader JSubroutineType JTypeAndId [JTypeAndId] deriving (Show, Eq)
---data JSubroutineBody = JSubroutineBody [JTypeAndId] [JStatement] deriving (Show, Eq)
-
-jackCompiler :: Table -> [[Char]] -> [[Char]]
-jackCompiler initTable = vmWriter initTable . fmap (fromRight (JClass "" [] []) . jackReader)
-
-vmWriter :: Table -> [JClass] -> [[Char]]
-vmWriter initTable xs = vClass (buildSRTable xs `Map.union` initTable) <$> xs
-
-vClass :: Table -> JClass -> [Char]
-vClass u (JClass name vars subs) = mconcat $ vSubroutineDec name t u n <$> subs where
-  (t, n) = buildCTable vars
-
-vSubroutineDec :: [Char] -> Table -> Table -> Int -> JSubroutineDec -> [Char]
-vSubroutineDec cName t u n sub = 
-  vFunction (cName ++ "." ++ sName) nLcls ++ kindSpec ++
-  vStatement t s u cName sName 0 stmts where 
-    JSubroutineDec (JSubroutineHeader _ (_, sName) args) (JSubroutineBody lcls stmts) = sub
-    nLcls = length lcls
-    kind = fst $ u Map.! (cName ++ "." ++ sName)
-    s = buildLTable (kind == "method") args lcls
-    kindSpec = if kind == "constructor" 
-      then vNew n 
-      else if kind == "method"
-        then vPush "argument" 0 ++ vPop "pointer" 0
-        else ""
-
--- data JStatement = JLetStatment JVarId JExpression 
-                -- | JIfStatement JExpression [JStatement] (Maybe [JStatement])
-                -- | JWhileStatment JExpression [JStatement]
-                -- | JDoStatement JSubroutineCall
-                -- | JReturnStatement (Maybe JExpression) 
-
-vStatement _ _ _ _ _ _ [] = ""
-
--- vExpression: push the result of exp; vPopToVar: pop to the var addr
-
-vStatement t s u cName name n ((JLetStatment var exp):stmts) =
-  vExpression t s u cName exp ++ vPopToVar t s u cName var ++ vStatement t s u cName name n stmts 
-
-vStatement t s u cName name n ((JIfStatement cond thenStmts elseStmts):stmts) =
-  vExpression t s u cName cond ++ vNot ++ vThen thenStmts ++ 
-  maybe (vLabel labelElse) vElse elseStmts ++ vStatement t s u cName name (n + 1) stmts where 
-    labelElse = name ++ ".Else" ++ show n
-    labelEndIf = name ++ ".Endif" ++ show n
-    labelIf = name ++ ".If" ++ show n
-    vThen xs = vIfGoto labelElse ++ vStatement t s u cName labelElse 0 xs
-    vElse xs = vGoto labelEndIf ++ vLabel labelElse ++ 
-               vStatement t s u cName labelIf 0 xs ++ vLabel labelEndIf
-
-vStatement t s u cName name n ((JWhileStatment cond loopStmts):stmts) = 
-  vLabel labelWhile ++ vExpression t s u cName cond ++ vNot ++ vIfGoto labelEndWhile ++ 
-  vStatement t s u cName labelWhile 0 loopStmts ++ vGoto labelWhile ++ 
-  vLabel labelEndWhile ++ vStatement t s u cName name (n + 1) stmts where
-    labelWhile = name ++ ".While" ++ show n
-    labelEndWhile = name ++ ".EndWhile" ++ show n
-
-vStatement t s u cName name n ((JDoStatement subCall):stmts) =
-  vSubroutineCall t s u cName subCall ++ vPop "temp" 0 ++ vStatement t s u cName name n stmts
-
-vStatement t s u cName name n ((JReturnStatement ret):stmts) =
-  maybe (vPush "constant" 0) (vExpression t s u cName) ret ++ vReturn ++
-  vStatement t s u cName name n stmts
-
--- data JExpression = JIntConst Int 
-           -- | JStrConst [Char]
-           -- | JKeywordConst [Char]       -- can only be true, false, null or this
-           -- | JExpVar JVarId
-           -- | JExpCall JSubroutineCall 
-           -- | JExpUna JUOp JExpression     -- JOp can only be - or ~ here
-           -- | JExpBin JExpression [(JBOp, JExpression)]
-
-vExpression :: Table -> Table -> Table -> [Char] -> JExpression -> [Char]
-
-vExpression t s _ _ (JIntConst n) = vPush "constant" n
-
-vExpression t s _ _ (JStrConst xs) = 
-  vPush "constant" (length xs) ++ vCall "String.new" 1 ++ mconcat (go <$> xs) where
-    go x = vPush "constant" (ord x) ++ vCall "String.appendChar" 2
-
-vExpression t s _ _ (JKeywordConst x) 
-  | x == "null" || x == "false" = vPush "constant" 0
-  | x == "true" = vPush "constant" 1 ++ vNeg
-  | x == "this" = vPush "pointer" 0
-
-vExpression t s u cName (JExpVar (JVarId name idx)) = vVar t s u cName name idx vPush
-
-vExpression t s u cName (JExpCall subCall) = vSubroutineCall t s u cName subCall
-
-vExpression t s u cName (JExpUna op exp) = vExpression t s u cName exp ++ vOp op
-  where vOp '~' = vNot; vOp '-' = vNeg;
-
-vExpression t s u cName (JExpBin exp xs) = 
-  vExpression t s u cName exp ++ mconcat (go <$> xs) 
-    where go (op, exp) = vExpression t s u cName exp ++ vOp op
-          vOp '+' = vAdd; vOp '-' = vSub; vOp '*' = vMul; vOp '/' = vDiv;
-          vOp '&' = vAnd; vOp '|' = vOr;  vOp '<' = vLt;  vOp '>' = vGt;
-          vOp '=' = vEq;
-
-vPopToVar t s u cName (JVarId name idx) = vVar t s u cName name idx vPop
-
-vVar :: Table -> Table -> Table -> [Char] -> [Char] -> Maybe JExpression -> ([Char] -> Int -> [Char]) -> [Char]
-vVar t s u cName name idx vPushOrPop = 
-  let (seg, n) = getSegN t s name in 
-    case idx of
-      Nothing -> vPushOrPop seg n
-      Just exp -> vPush seg n ++ vExpression t s u cName exp ++ vAdd 
-                       ++ vPop "pointer" 1 ++ vPushOrPop "that" 0
-      
-
-getRecord :: Table -> Table -> [Char] -> ([Char], ([Char], Int))
-getRecord t s name = case Map.lookup name s of
-  Just x -> x
-  Nothing -> t Map.! name
-
-getSegN :: Table -> Table -> [Char] -> ([Char], Int)
-getSegN t s name = snd $ getRecord t s name
-
-getType :: Table -> Table -> [Char] -> [Char]
-getType t s name = fst $ getRecord t s name
-
--- data JSubroutineCall = JSubroutineCall JIdentifier (Maybe JIdentifier) [JExpression] deriving (Show, Eq)
-vSubroutineCall t s u cName (JSubroutineCall name name' args) = 
-  method ++ mconcat (vExpression t s u cName <$> args) ++ vCall name'' nArgs
-    where 
-      name'' = if name' == Nothing 
-                 then cName ++ "." ++ name
-                 else if head name `elem` ['A' .. 'Z'] 
-                        then name ++ "." ++ fromJust name'
-                        else getType t s name ++ "." ++ fromJust name'
-      -- u is the SRTable
-      (method, nArgs) = 
-         if fst (u Map.! name'') == "method"
-           then if name' == Nothing 
-                  then (vPush "pointer" 0, length args + 1)
-                  else let (seg, n) = getSegN t s name in (vPush seg n, length args + 1)
-           else ("", length args)
-
-vNew n = vPush "constant" n ++ vCall "Memory.alloc" 1 ++ vPop "pointer" 0
-vAdd = "add\n"
-vNot = "not\n"
-vNeg = "neg\n"
-vSub = "sub\n"
-vMul = "call Math.multiply 2\n"
-vDiv = "call Math.divide 2\n"
-vAnd = "and\n"
-vOr = "or\n"
-vLt = "lt\n"
-vGt = "gt\n"
-vEq = "eq\n"
-vReturn = "return\n"
-vLabel xs = "label " ++ xs ++ "\n"
-vGoto xs = "goto " ++ xs ++ "\n"
-vIfGoto xs = "if-goto " ++ xs ++ "\n"
-vFunction xs n = "function " ++ xs ++ " " ++ show n ++ "\n"
-vCall xs n = "call " ++ xs ++ " " ++ show n ++ "\n"
-vPush xs n = "push " ++ xs ++ " " ++ show n ++ "\n"
-vPop xs n = "pop " ++ xs ++ " " ++ show n ++ "\n"
-
-
--- IO
-
--- reader of system subroutines' headers
-jClasses :: JackParser [JClass]
-jClasses = many (try $ many jSpace >> jClass)
-
-sysSubroutineTable :: IO Table
-sysSubroutineTable = do
-  x <- readFile "./systemsub.txt"
-  return $ buildSRTable $ head $ rights [parse' jClasses x]
-
-main = do
-  dir <- head <$> getArgs
-  filesWODir <- filter isJackFile <$> listDirectory dir 
-  let jackFiles = (dir++) <$> filesWODir
-  codes <- sequence $ readFile <$> jackFiles
-  initTable <- sysSubroutineTable
-  zipWithM writeFile (chExt <$> jackFiles) (jackCompiler initTable codes)
-    where isJackFile xs = drop (length xs - 5) xs == ".jack"
-          chExt xs = take (length xs - 4) xs ++ "vm"
-          --}
-
-
---testing
-
-testCompiler :: [[Char]] -> IO ()
-testCompiler xs = do
-  initTable <- sysSubroutineTable
-  print $ jackCompiler initTable xs
-
-testCompiler' :: IO ()
-testCompiler' = do
-  --xs <- readFile "./Square/Square.jack"
-  xs <- readFile "./Pong/Ball.jack"
-  testCompiler [xs]
-
-testReader :: IO ()
-testReader = do
-  --xs <- readFile "./Square/Square.jack"
-  xs <- readFile "./Pong/Ball.jack"
-  --print $ buildSRTable $ rights $ [jackReader $ xs]
-  print $ jackReader $ xs
-
-
---test reader writer x = let Right y = parse' reader x in writer y
---test' x = let Right y = parse' jStatement x in vStatement Map.empty Map.empty Map.empty "" 0 [y]
-
-
diff --git a/projects/11/JackCompiler.o b/projects/11/JackCompiler.o
deleted file mode 100644
index 49a6ac5..0000000
--- a/projects/11/JackCompiler.o
+++ /dev/null
diff --git a/projects/11/K/Board.jack b/projects/11/K/Board.jack
deleted file mode 100644
index 49d42d5..0000000
--- a/projects/11/K/Board.jack
+++ /dev/null
@@ -1,305 +0,0 @@
-class Board {
-    field Array grid;
-    field int nTurn;
-    field int seed;
-
-    constructor Board new() {
-        var int i, j;
-        var Array t;
-        let grid = Array.new(4);
-        let i = 0;
-        while (i < 4) {
-            let j = 0;
-            let grid[i] = Array.new(4);
-            let t = grid[i];
-            while (j < 4) {
-                let t[j] = 32;
-                let j = j + 1;
-            }
-            let i = i + 1;
-        }
-        let t = grid[0];
-        let t[0] = 65;
-        let nTurn = 0;
-        let seed = 0;
-        return this;
-    }
-
-    method void arrange(Array xs, boolean isHorizontal) {
-        if (isHorizontal) {
-            do deepcopy(xs, grid);
-        } else {
-            do transpose(xs, grid);
-        }
-        do dispose4(xs);
-        return;
-    }
-
-
-    method void copy(Array xs, Array ys) {
-        var int i;
-        let i = 0;
-        while (i < 4) {
-            let ys[i] = xs[i];
-            let i = i + 1;
-        }
-        return;
-    }
-
-    method void deepcopy(Array xs, Array ys) {
-        var int i;
-        let i = 0;
-        while (i < 4) {
-            do copy(xs[i], ys[i]);
-            let i = i + 1;
-        }
-        return;
-    }
-
-    method void transpose(Array xs, Array ys) {
-        var int i, j;
-        var Array t, s;
-        let i = 0;
-        while (i < 4) {
-            let j = 0;
-            let t = ys[i];
-            while (j < 4) {
-                let s = xs[j];
-                let t[j] = s[i];
-                let j = j + 1;
-            }
-            let i = i + 1;
-        }
-        return;
-    }
-
-    method void dispose4(Array xs){
-        var int i;
-        var Array t;
-        let i = 0;
-        while (i < 4) {
-            let t = xs[i];
-            do t.dispose();
-            let i = i + 1;
-        }
-        do xs.dispose();
-        return;
-    }
-
-    method Array new4(){
-        var Array xs;
-        var int i;
-        let xs = Array.new(4);
-        let i = 0;
-        while (i < 4) {
-            let xs[i] = Array.new(4);
-            let i = i + 1;
-        }
-        return xs;
-    }
-
-    method Array getStrips(boolean isHorizontal){
-        var Array xs;
-        let xs = new4();
-        if (isHorizontal) {
-            do deepcopy(grid, xs);
-        } else {
-            do transpose(grid, xs);
-        }
-        return xs;
-    }
-
-    method Array align(Array xs, boolean left){
-        var int i, j;
-        let i = 0;
-        let j = 0;
-        if (left) {
-            while (i < 4) {
-                if (xs[i] > 64) {
-                    let xs[j] = xs[i];
-                    let j = j + 1;
-                }
-                let i = i + 1;
-            }
-            while (j < 4) {
-                let xs[j] = 32;
-                let j = j + 1;
-            }
-        } else {
-            while (i < 4) {
-                if (xs[3 - i] > 64) {
-                    let xs[3 - j] = xs[3 - i];
-                    let j = j + 1;
-                }
-                let i = i + 1;
-            }
-            while (j < 4) {
-                let xs[3 - j] = 32;
-                let j = j + 1;
-            }
-        }
-        return xs;
-    }
-
-    method Array reduce(Array xs, boolean left){
-        if ((xs[0] = xs[1]) & (xs[2] = xs[3]) & (xs[0] > 64) & (xs[2] > 64)) {
-            if (left) {
-                let xs[0] = xs[0] + 1;
-                let xs[1] = xs[2] + 1; 
-                let xs[2] = 32;
-                let xs[3] = 32;
-            } else {
-                let xs[3] = xs[3] + 1;
-                let xs[2] = xs[1] + 1;
-                let xs[1] = 32;
-                let xs[0] = 32;
-            }
-            return xs;
-        }
-        if ((xs[0] = xs[1]) & (xs[0] > 64)) {
-            if (left) {
-                let xs[0] = xs[0] + 1;
-                let xs[1] = xs[2];
-                let xs[2] = xs[3];
-                let xs[3] = 32;
-            } else {
-                let xs[1] = xs[1] + 1;
-                let xs[0] = 32;
-            }
-            return xs;
-        }
-        if ((xs[2] = xs[3]) & (xs[2] > 64)) {
-            if (left) {
-                let xs[2] = xs[2] + 1;
-                let xs[3] = 32;
-            } else {
-                let xs[3] = xs[3] + 1;
-                let xs[2] = xs[1];
-                let xs[1] = xs[0];
-                let xs[0] = 32;
-            }
-            return xs;
-        }
-        if ((xs[1] = xs[2]) & (xs[1] > 64)) {
-            if (left) {
-                let xs[1] = xs[1] + 1;
-                let xs[2] = xs[3];
-                let xs[3] = 32;
-            } else {
-                let xs[2] = xs[2] + 1;
-                let xs[1] = xs[0];
-                let xs[0] = 32;
-            }
-            return xs;
-        }
-        return xs;
-    }
-
-    method void addTile(){
-        var Array t;
-        var int r, c, parity, newTile;
-        /*
-        let t = grid[1];
-        if (t[1] = 32) {
-            let t[1] = 65;
-        }
-        */
-        let seed = seed * 25173 + 13849;
-        if (seed < 0) {
-            let seed = - seed;
-        }
-
-        if (seed - (seed / 2 * 2) = 0) {
-            let parity = 1;
-        } else {
-            let parity = -1;
-        }
-
-        let seed = seed - (seed / 16 * 16);
-        let r = seed / 4;
-        let c = seed - (4 * r);
-        let t = grid[r];
-        let newTile = 65;
-
-        while (t[c] > 64){
-            let seed = seed + parity;
-            if (seed < 0) {
-                let seed = 15;
-            }
-            let seed = seed - (seed / 16 * 16);
-            let r = seed / 4;
-            let c = seed - (4 * r);
-            let t = grid[r];
-            let newTile = 131 - newTile;
-        }
-        let t[c] = newTile;
-        return;
-    }
-
-    method void transform(char dir){
-        var boolean isHorizontal, left;
-        var Array xs;
-        var int i;
-        if ((dir = 0) | (dir = 1)) {
-            let left = true;
-        } else {
-            let left = false;
-        }
-        if ((dir = 0) | (dir = 2)) {
-            let isHorizontal = true;
-        } else {
-            let isHorizontal = false;
-        }
-        let xs = getStrips(isHorizontal);
-        let i = 0;
-        while (i < 4) {
-            let xs[i] = reduce(align(xs[i], left), left);
-            let i = i + 1;
-        }
-        do arrange(xs, isHorizontal);
-        return;
-    }
-
-    method void next(char dir){
-        let nTurn = nTurn + 1;
-        do transform(dir);
-        do addTile();
-        return;
-    }
-
-    method void draw(){
-        var int r, c, i, j;
-        var Array t;
-        let r = 9;
-        let c = 30;
-
-        do Output.moveCursor(r - 1, c - 1);
-        do Output.printString("+----+");
-        do Output.moveCursor(r + 4, c - 1);
-        do Output.printString("+----+");
-
-        let i = 0;
-        while (i < 4) {
-            let j = 0;
-            do Output.moveCursor(r + i, c - 1);
-            do Output.printString("|");
-            let t = grid[i];
-            while (j < 4) {
-                do Output.printChar(t[j]);
-                let j = j + 1;
-            }
-            do Output.printString("|");
-            let i = i + 1;
-        }
-
-        do Output.moveCursor(r + 6, c - 2);
-        do Output.printString("Turn: ");
-        do Output.printInt(nTurn);
-        return;
-    }
-
-    method void dispose() {
-        do Memory.deAlloc(this);
-        return;
-    }
-}
diff --git a/projects/11/K/Board.vm b/projects/11/K/Board.vm
deleted file mode 100644
index 272b52d..0000000
--- a/projects/11/K/Board.vm
+++ /dev/null
@@ -1,1183 +0,0 @@
-function Board.new 3
-push constant 3
-call Memory.alloc 1
-pop pointer 0
-push constant 4
-call Array.new 1
-pop this 0
-push constant 0
-pop local 0
-label new.While0
-push local 0
-push constant 4
-lt
-not
-if-goto new.EndWhile0
-push constant 0
-pop local 1
-push constant 4
-call Array.new 1
-push this 0
-push local 0
-add
-pop pointer 1
-pop that 0
-push this 0
-push local 0
-add
-pop pointer 1
-push that 0
-pop local 2
-label new.While0.While0
-push local 1
-push constant 4
-lt
-not
-if-goto new.While0.EndWhile0
-push constant 32
-push local 2
-push local 1
-add
-pop pointer 1
-pop that 0
-push local 1
-push constant 1
-add
-pop local 1
-goto new.While0.While0
-label new.While0.EndWhile0
-push local 0
-push constant 1
-add
-pop local 0
-goto new.While0
-label new.EndWhile0
-push this 0
-push constant 0
-add
-pop pointer 1
-push that 0
-pop local 2
-push constant 65
-push local 2
-push constant 0
-add
-pop pointer 1
-pop that 0
-push constant 0
-pop this 1
-push constant 0
-pop this 2
-push pointer 0
-return
-function Board.arrange 0
-push argument 0
-pop pointer 0
-push argument 2
-not
-if-goto arrange.Else0
-push pointer 0
-push argument 1
-push this 0
-call Board.deepcopy 3
-pop temp 0
-goto arrange.Endif0
-label arrange.Else0
-push pointer 0
-push argument 1
-push this 0
-call Board.transpose 3
-pop temp 0
-label arrange.Endif0
-push pointer 0
-push argument 1
-call Board.dispose4 2
-pop temp 0
-push constant 0
-return
-function Board.copy 1
-push argument 0
-pop pointer 0
-push constant 0
-pop local 0
-label copy.While0
-push local 0
-push constant 4
-lt
-not
-if-goto copy.EndWhile0
-push argument 1
-push local 0
-add
-pop pointer 1
-push that 0
-push argument 2
-push local 0
-add
-pop pointer 1
-pop that 0
-push local 0
-push constant 1
-add
-pop local 0
-goto copy.While0
-label copy.EndWhile0
-push constant 0
-return
-function Board.deepcopy 1
-push argument 0
-pop pointer 0
-push constant 0
-pop local 0
-label deepcopy.While0
-push local 0
-push constant 4
-lt
-not
-if-goto deepcopy.EndWhile0
-push pointer 0
-push argument 1
-push local 0
-add
-pop pointer 1
-push that 0
-push argument 2
-push local 0
-add
-pop pointer 1
-push that 0
-call Board.copy 3
-pop temp 0
-push local 0
-push constant 1
-add
-pop local 0
-goto deepcopy.While0
-label deepcopy.EndWhile0
-push constant 0
-return
-function Board.transpose 4
-push argument 0
-pop pointer 0
-push constant 0
-pop local 0
-label transpose.While0
-push local 0
-push constant 4
-lt
-not
-if-goto transpose.EndWhile0
-push constant 0
-pop local 1
-push argument 2
-push local 0
-add
-pop pointer 1
-push that 0
-pop local 2
-label transpose.While0.While0
-push local 1
-push constant 4
-lt
-not
-if-goto transpose.While0.EndWhile0
-push argument 1
-push local 1
-add
-pop pointer 1
-push that 0
-pop local 3
-push local 3
-push local 0
-add
-pop pointer 1
-push that 0
-push local 2
-push local 1
-add
-pop pointer 1
-pop that 0
-push local 1
-push constant 1
-add
-pop local 1
-goto transpose.While0.While0
-label transpose.While0.EndWhile0
-push local 0
-push constant 1
-add
-pop local 0
-goto transpose.While0
-label transpose.EndWhile0
-push constant 0
-return
-function Board.dispose4 2
-push argument 0
-pop pointer 0
-push constant 0
-pop local 0
-label dispose4.While0
-push local 0
-push constant 4
-lt
-not
-if-goto dispose4.EndWhile0
-push argument 1
-push local 0
-add
-pop pointer 1
-push that 0
-pop local 1
-push local 1
-call Array.dispose 1
-pop temp 0
-push local 0
-push constant 1
-add
-pop local 0
-goto dispose4.While0
-label dispose4.EndWhile0
-push argument 1
-call Array.dispose 1
-pop temp 0
-push constant 0
-return
-function Board.new4 2
-push argument 0
-pop pointer 0
-push constant 4
-call Array.new 1
-pop local 0
-push constant 0
-pop local 1
-label new4.While0
-push local 1
-push constant 4
-lt
-not
-if-goto new4.EndWhile0
-push constant 4
-call Array.new 1
-push local 0
-push local 1
-add
-pop pointer 1
-pop that 0
-push local 1
-push constant 1
-add
-pop local 1
-goto new4.While0
-label new4.EndWhile0
-push local 0
-return
-function Board.getStrips 1
-push argument 0
-pop pointer 0
-push pointer 0
-call Board.new4 1
-pop local 0
-push argument 1
-not
-if-goto getStrips.Else0
-push pointer 0
-push this 0
-push local 0
-call Board.deepcopy 3
-pop temp 0
-goto getStrips.Endif0
-label getStrips.Else0
-push pointer 0
-push this 0
-push local 0
-call Board.transpose 3
-pop temp 0
-label getStrips.Endif0
-push local 0
-return
-function Board.align 2
-push argument 0
-pop pointer 0
-push constant 0
-pop local 0
-push constant 0
-pop local 1
-push argument 2
-not
-if-goto align.Else0
-label align.Else0.While0
-push local 0
-push constant 4
-lt
-not
-if-goto align.Else0.EndWhile0
-push argument 1
-push local 0
-add
-pop pointer 1
-push that 0
-push constant 64
-gt
-not
-if-goto align.Else0.While0.Else0
-push argument 1
-push local 0
-add
-pop pointer 1
-push that 0
-push argument 1
-push local 1
-add
-pop pointer 1
-pop that 0
-push local 1
-push constant 1
-add
-pop local 1
-label align.Else0.While0.Else0
-push local 0
-push constant 1
-add
-pop local 0
-goto align.Else0.While0
-label align.Else0.EndWhile0
-label align.Else0.While1
-push local 1
-push constant 4
-lt
-not
-if-goto align.Else0.EndWhile1
-push constant 32
-push argument 1
-push local 1
-add
-pop pointer 1
-pop that 0
-push local 1
-push constant 1
-add
-pop local 1
-goto align.Else0.While1
-label align.Else0.EndWhile1
-goto align.Endif0
-label align.Else0
-label align.If0.While0
-push local 0
-push constant 4
-lt
-not
-if-goto align.If0.EndWhile0
-push argument 1
-push constant 3
-push local 0
-sub
-add
-pop pointer 1
-push that 0
-push constant 64
-gt
-not
-if-goto align.If0.While0.Else0
-push argument 1
-push constant 3
-push local 0
-sub
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 3
-push local 1
-sub
-add
-pop pointer 1
-pop that 0
-push local 1
-push constant 1
-add
-pop local 1
-label align.If0.While0.Else0
-push local 0
-push constant 1
-add
-pop local 0
-goto align.If0.While0
-label align.If0.EndWhile0
-label align.If0.While1
-push local 1
-push constant 4
-lt
-not
-if-goto align.If0.EndWhile1
-push constant 32
-push argument 1
-push constant 3
-push local 1
-sub
-add
-pop pointer 1
-pop that 0
-push local 1
-push constant 1
-add
-pop local 1
-goto align.If0.While1
-label align.If0.EndWhile1
-label align.Endif0
-push argument 1
-return
-function Board.reduce 0
-push argument 0
-pop pointer 0
-push argument 1
-push constant 0
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 1
-add
-pop pointer 1
-push that 0
-eq
-push argument 1
-push constant 2
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 3
-add
-pop pointer 1
-push that 0
-eq
-and
-push argument 1
-push constant 0
-add
-pop pointer 1
-push that 0
-push constant 64
-gt
-and
-push argument 1
-push constant 2
-add
-pop pointer 1
-push that 0
-push constant 64
-gt
-and
-not
-if-goto reduce.Else0
-push argument 2
-not
-if-goto reduce.Else0.Else0
-push argument 1
-push constant 0
-add
-pop pointer 1
-push that 0
-push constant 1
-add
-push argument 1
-push constant 0
-add
-pop pointer 1
-pop that 0
-push argument 1
-push constant 2
-add
-pop pointer 1
-push that 0
-push constant 1
-add
-push argument 1
-push constant 1
-add
-pop pointer 1
-pop that 0
-push constant 32
-push argument 1
-push constant 2
-add
-pop pointer 1
-pop that 0
-push constant 32
-push argument 1
-push constant 3
-add
-pop pointer 1
-pop that 0
-goto reduce.Else0.Endif0
-label reduce.Else0.Else0
-push argument 1
-push constant 3
-add
-pop pointer 1
-push that 0
-push constant 1
-add
-push argument 1
-push constant 3
-add
-pop pointer 1
-pop that 0
-push argument 1
-push constant 1
-add
-pop pointer 1
-push that 0
-push constant 1
-add
-push argument 1
-push constant 2
-add
-pop pointer 1
-pop that 0
-push constant 32
-push argument 1
-push constant 1
-add
-pop pointer 1
-pop that 0
-push constant 32
-push argument 1
-push constant 0
-add
-pop pointer 1
-pop that 0
-label reduce.Else0.Endif0
-push argument 1
-return
-label reduce.Else0
-push argument 1
-push constant 0
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 1
-add
-pop pointer 1
-push that 0
-eq
-push argument 1
-push constant 0
-add
-pop pointer 1
-push that 0
-push constant 64
-gt
-and
-not
-if-goto reduce.Else1
-push argument 2
-not
-if-goto reduce.Else1.Else0
-push argument 1
-push constant 0
-add
-pop pointer 1
-push that 0
-push constant 1
-add
-push argument 1
-push constant 0
-add
-pop pointer 1
-pop that 0
-push argument 1
-push constant 2
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 1
-add
-pop pointer 1
-pop that 0
-push argument 1
-push constant 3
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 2
-add
-pop pointer 1
-pop that 0
-push constant 32
-push argument 1
-push constant 3
-add
-pop pointer 1
-pop that 0
-goto reduce.Else1.Endif0
-label reduce.Else1.Else0
-push argument 1
-push constant 1
-add
-pop pointer 1
-push that 0
-push constant 1
-add
-push argument 1
-push constant 1
-add
-pop pointer 1
-pop that 0
-push constant 32
-push argument 1
-push constant 0
-add
-pop pointer 1
-pop that 0
-label reduce.Else1.Endif0
-push argument 1
-return
-label reduce.Else1
-push argument 1
-push constant 2
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 3
-add
-pop pointer 1
-push that 0
-eq
-push argument 1
-push constant 2
-add
-pop pointer 1
-push that 0
-push constant 64
-gt
-and
-not
-if-goto reduce.Else2
-push argument 2
-not
-if-goto reduce.Else2.Else0
-push argument 1
-push constant 2
-add
-pop pointer 1
-push that 0
-push constant 1
-add
-push argument 1
-push constant 2
-add
-pop pointer 1
-pop that 0
-push constant 32
-push argument 1
-push constant 3
-add
-pop pointer 1
-pop that 0
-goto reduce.Else2.Endif0
-label reduce.Else2.Else0
-push argument 1
-push constant 3
-add
-pop pointer 1
-push that 0
-push constant 1
-add
-push argument 1
-push constant 3
-add
-pop pointer 1
-pop that 0
-push argument 1
-push constant 1
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 2
-add
-pop pointer 1
-pop that 0
-push argument 1
-push constant 0
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 1
-add
-pop pointer 1
-pop that 0
-push constant 32
-push argument 1
-push constant 0
-add
-pop pointer 1
-pop that 0
-label reduce.Else2.Endif0
-push argument 1
-return
-label reduce.Else2
-push argument 1
-push constant 1
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 2
-add
-pop pointer 1
-push that 0
-eq
-push argument 1
-push constant 1
-add
-pop pointer 1
-push that 0
-push constant 64
-gt
-and
-not
-if-goto reduce.Else3
-push argument 2
-not
-if-goto reduce.Else3.Else0
-push argument 1
-push constant 1
-add
-pop pointer 1
-push that 0
-push constant 1
-add
-push argument 1
-push constant 1
-add
-pop pointer 1
-pop that 0
-push argument 1
-push constant 3
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 2
-add
-pop pointer 1
-pop that 0
-push constant 32
-push argument 1
-push constant 3
-add
-pop pointer 1
-pop that 0
-goto reduce.Else3.Endif0
-label reduce.Else3.Else0
-push argument 1
-push constant 2
-add
-pop pointer 1
-push that 0
-push constant 1
-add
-push argument 1
-push constant 2
-add
-pop pointer 1
-pop that 0
-push argument 1
-push constant 0
-add
-pop pointer 1
-push that 0
-push argument 1
-push constant 1
-add
-pop pointer 1
-pop that 0
-push constant 32
-push argument 1
-push constant 0
-add
-pop pointer 1
-pop that 0
-label reduce.Else3.Endif0
-push argument 1
-return
-label reduce.Else3
-push argument 1
-return
-function Board.addTile 5
-push argument 0
-pop pointer 0
-push this 2
-push constant 25173
-call Math.multiply 2
-push constant 13849
-add
-pop this 2
-push this 2
-push constant 0
-lt
-not
-if-goto addTile.Else0
-push this 2
-neg
-pop this 2
-label addTile.Else0
-push this 2
-push this 2
-push constant 2
-call Math.divide 2
-push constant 2
-call Math.multiply 2
-sub
-push constant 0
-eq
-not
-if-goto addTile.Else1
-push constant 1
-pop local 3
-goto addTile.Endif1
-label addTile.Else1
-push constant 1
-neg
-pop local 3
-label addTile.Endif1
-push this 2
-push this 2
-push constant 16
-call Math.divide 2
-push constant 16
-call Math.multiply 2
-sub
-pop this 2
-push this 2
-push constant 4
-call Math.divide 2
-pop local 1
-push this 2
-push constant 4
-push local 1
-call Math.multiply 2
-sub
-pop local 2
-push this 0
-push local 1
-add
-pop pointer 1
-push that 0
-pop local 0
-push constant 65
-pop local 4
-label addTile.While2
-push local 0
-push local 2
-add
-pop pointer 1
-push that 0
-push constant 64
-gt
-not
-if-goto addTile.EndWhile2
-push this 2
-push local 3
-add
-pop this 2
-push this 2
-push constant 0
-lt
-not
-if-goto addTile.While2.Else0
-push constant 15
-pop this 2
-label addTile.While2.Else0
-push this 2
-push this 2
-push constant 16
-call Math.divide 2
-push constant 16
-call Math.multiply 2
-sub
-pop this 2
-push this 2
-push constant 4
-call Math.divide 2
-pop local 1
-push this 2
-push constant 4
-push local 1
-call Math.multiply 2
-sub
-pop local 2
-push this 0
-push local 1
-add
-pop pointer 1
-push that 0
-pop local 0
-push constant 131
-push local 4
-sub
-pop local 4
-goto addTile.While2
-label addTile.EndWhile2
-push local 4
-push local 0
-push local 2
-add
-pop pointer 1
-pop that 0
-push constant 0
-return
-function Board.transform 4
-push argument 0
-pop pointer 0
-push argument 1
-push constant 0
-eq
-push argument 1
-push constant 1
-eq
-or
-not
-if-goto transform.Else0
-push constant 1
-neg
-pop local 1
-goto transform.Endif0
-label transform.Else0
-push constant 0
-pop local 1
-label transform.Endif0
-push argument 1
-push constant 0
-eq
-push argument 1
-push constant 2
-eq
-or
-not
-if-goto transform.Else1
-push constant 1
-neg
-pop local 0
-goto transform.Endif1
-label transform.Else1
-push constant 0
-pop local 0
-label transform.Endif1
-push pointer 0
-push local 0
-call Board.getStrips 2
-pop local 2
-push constant 0
-pop local 3
-label transform.While2
-push local 3
-push constant 4
-lt
-not
-if-goto transform.EndWhile2
-push pointer 0
-push pointer 0
-push local 2
-push local 3
-add
-pop pointer 1
-push that 0
-push local 1
-call Board.align 3
-push local 1
-call Board.reduce 3
-push local 2
-push local 3
-add
-pop pointer 1
-pop that 0
-push local 3
-push constant 1
-add
-pop local 3
-goto transform.While2
-label transform.EndWhile2
-push pointer 0
-push local 2
-push local 0
-call Board.arrange 3
-pop temp 0
-push constant 0
-return
-function Board.next 0
-push argument 0
-pop pointer 0
-push this 1
-push constant 1
-add
-pop this 1
-push pointer 0
-push argument 1
-call Board.transform 2
-pop temp 0
-push pointer 0
-call Board.addTile 1
-pop temp 0
-push constant 0
-return
-function Board.draw 5
-push argument 0
-pop pointer 0
-push constant 9
-pop local 0
-push constant 30
-pop local 1
-push local 0
-push constant 1
-sub
-push local 1
-push constant 1
-sub
-call Output.moveCursor 2
-pop temp 0
-push constant 6
-call String.new 1
-push constant 43
-call String.appendChar 2
-push constant 45
-call String.appendChar 2
-push constant 45
-call String.appendChar 2
-push constant 45
-call String.appendChar 2
-push constant 45
-call String.appendChar 2
-push constant 43
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push local 0
-push constant 4
-add
-push local 1
-push constant 1
-sub
-call Output.moveCursor 2
-pop temp 0
-push constant 6
-call String.new 1
-push constant 43
-call String.appendChar 2
-push constant 45
-call String.appendChar 2
-push constant 45
-call String.appendChar 2
-push constant 45
-call String.appendChar 2
-push constant 45
-call String.appendChar 2
-push constant 43
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push constant 0
-pop local 2
-label draw.While0
-push local 2
-push constant 4
-lt
-not
-if-goto draw.EndWhile0
-push constant 0
-pop local 3
-push local 0
-push local 2
-add
-push local 1
-push constant 1
-sub
-call Output.moveCursor 2
-pop temp 0
-push constant 1
-call String.new 1
-push constant 124
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push this 0
-push local 2
-add
-pop pointer 1
-push that 0
-pop local 4
-label draw.While0.While0
-push local 3
-push constant 4
-lt
-not
-if-goto draw.While0.EndWhile0
-push local 4
-push local 3
-add
-pop pointer 1
-push that 0
-call Output.printChar 1
-pop temp 0
-push local 3
-push constant 1
-add
-pop local 3
-goto draw.While0.While0
-label draw.While0.EndWhile0
-push constant 1
-call String.new 1
-push constant 124
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push local 2
-push constant 1
-add
-pop local 2
-goto draw.While0
-label draw.EndWhile0
-push local 0
-push constant 6
-add
-push local 1
-push constant 2
-sub
-call Output.moveCursor 2
-pop temp 0
-push constant 6
-call String.new 1
-push constant 84
-call String.appendChar 2
-push constant 117
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 110
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push this 1
-call Output.printInt 1
-pop temp 0
-push constant 0
-return
-function Board.dispose 0
-push argument 0
-pop pointer 0
-push pointer 0
-call Memory.deAlloc 1
-pop temp 0
-push constant 0
-return
diff --git a/projects/11/K/K.txt b/projects/11/K/K.txt
deleted file mode 100644
index dc75c82..0000000
--- a/projects/11/K/K.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-from a to k
-
-- a title frame showing game name and instructions. space to continue.
-- a main frame showing the game running
-- a endofgame frame showing game results: win or lose
-
-- a Board class with cell being a 4 by 4 two-d array.
-- arrange strings according to an orientation: arrange(4 strings, dir)=cells
-  - dir: 0: align to left, 1: align to right, 2: align to top, 3:align to bottom
-  - e.g.: arrange({"abc", "bc", "dc", "efeh", 0}) gives the following board:
-         abc_
-         bc__
-         dc__
-         efeh
-  - arrange({"abc", "bc", "dc", "efeh", 0}, 3) gives the following
-     ___e
-     a__f
-     bbde
-     ccch
-- a new tile of 'a' or 'b' appears each turn somewhere, using some quasirandomisation e.g. (23 * n^2 + 79) mod 16.
-  - addtile(char, x, y)
-- the board transformation: board.trans(dir) = arrange(dir) . (fmap reduce) . getstring(dir). calls getstrings, then reduce on each row / column
-- board.getstrings(dir)= the strings according to direction dir. Inverse of arrange.
-- reduce(string)=string: reduce("baac")=="bbc"; reduce("aabb")=="bc"; and reduce("cbb")== "cc" instead of "d".
-- when one of the hjkl keys is pressed get the direction dir.
diff --git a/projects/11/K/KGame.jack b/projects/11/K/KGame.jack
deleted file mode 100644
index 796f5b5..0000000
--- a/projects/11/K/KGame.jack
+++ /dev/null
@@ -1,34 +0,0 @@
-class KGame{
-    field Board board;
-
-    constructor KGame new() {
-        let board = Board.new();
-        do board.draw();
-        return this;
-    }
-
-    method void dispose() {
-        do board.dispose();
-        do Memory.deAlloc(this);
-        return;
-    }
-
-    method void run() {
-        var int key, dir;
-        var boolean exit;
-        let key = 0;
-        let exit = false;
-        while (~exit) {
-            while ((key < 130) | (key > 133)) {
-                let key = Keyboard.keyPressed();
-            }
-            let dir = key - 130;
-            while (~(key = 0)) {
-                let key = Keyboard.keyPressed();
-            }
-            do board.next(dir);
-            do board.draw();
-        }
-        return;
-    }
-}
diff --git a/projects/11/K/KGame.vm b/projects/11/K/KGame.vm
deleted file mode 100644
index eef2df0..0000000
--- a/projects/11/K/KGame.vm
+++ /dev/null
@@ -1,74 +0,0 @@
-function KGame.new 0
-push constant 1
-call Memory.alloc 1
-pop pointer 0
-call Board.new 0
-pop this 0
-push this 0
-call Board.draw 1
-pop temp 0
-push pointer 0
-return
-function KGame.dispose 0
-push argument 0
-pop pointer 0
-push this 0
-call Board.dispose 1
-pop temp 0
-push pointer 0
-call Memory.deAlloc 1
-pop temp 0
-push constant 0
-return
-function KGame.run 3
-push argument 0
-pop pointer 0
-push constant 0
-pop local 0
-push constant 0
-pop local 2
-label run.While0
-push local 2
-not
-not
-if-goto run.EndWhile0
-label run.While0.While0
-push local 0
-push constant 130
-lt
-push local 0
-push constant 133
-gt
-or
-not
-if-goto run.While0.EndWhile0
-call Keyboard.keyPressed 0
-pop local 0
-goto run.While0.While0
-label run.While0.EndWhile0
-push local 0
-push constant 130
-sub
-pop local 1
-label run.While0.While1
-push local 0
-push constant 0
-eq
-not
-not
-if-goto run.While0.EndWhile1
-call Keyboard.keyPressed 0
-pop local 0
-goto run.While0.While1
-label run.While0.EndWhile1
-push this 0
-push local 1
-call Board.next 2
-pop temp 0
-push this 0
-call Board.draw 1
-pop temp 0
-goto run.While0
-label run.EndWhile0
-push constant 0
-return
diff --git a/projects/11/K/Main.jack b/projects/11/K/Main.jack
deleted file mode 100644
index 4136e80..0000000
--- a/projects/11/K/Main.jack
+++ /dev/null
@@ -1,9 +0,0 @@
-class Main {
-    function void main() {
-        var KGame game;
-        let game = KGame.new();
-        do game.run();
-        do game.dispose();
-        return;
-    }
-}
diff --git a/projects/11/K/Main.vm b/projects/11/K/Main.vm
deleted file mode 100644
index 0a56ae9..0000000
--- a/projects/11/K/Main.vm
+++ /dev/null
@@ -1,11 +0,0 @@
-function Main.main 1
-call KGame.new 0
-pop local 0
-push local 0
-call KGame.run 1
-pop temp 0
-push local 0
-call KGame.dispose 1
-pop temp 0
-push constant 0
-return
diff --git a/projects/11/Pong/Ball.jack b/projects/11/Pong/Ball.jack
deleted file mode 100644
index 02e47f9..0000000
--- a/projects/11/Pong/Ball.jack
+++ /dev/null
@@ -1,203 +0,0 @@
-// This file is part of www.nand2tetris.org

-// and the book "The Elements of Computing Systems"

-// by Nisan and Schocken, MIT Press.

-// File name: projects/11/Pong/Ball.jack

-

-/**

- * A graphical ball. Characterized by a screen location and distance of 

- * last destination. Has methods for drawing, erasing and moving on the screen.

- * The ball is displayed as a filled, 6-by-6 pixles rectangle. 

- */

-class Ball {

-

-    field int x, y;               // the ball's screen location (in pixels)

-    field int lengthx, lengthy;   // distance of last destination (in pixels)

-

-    field int d, straightD, diagonalD;            // used for straight line movement computation

-    field boolean invert, positivex, positivey;   // (same)

-   

-    field int leftWall, rightWall, topWall, bottomWall;  // wall locations

-   

-    field int wall;   // last wall that the ball was bounced off of

-

-    /** Constructs a new ball with the given initial location and wall locations. */

-    constructor Ball new(int Ax, int Ay,

-                         int AleftWall, int ArightWall, int AtopWall, int AbottomWall) {    	

-	    let x = Ax;		

-	    let y = Ay;

-	    let leftWall = AleftWall;

-	    let rightWall = ArightWall - 6;    // -6 for ball size

-	    let topWall = AtopWall; 

-	    let bottomWall = AbottomWall - 6;  // -6 for ball size

-	    let wall = 0;

-        do show();

-        return this;

-    }

-

-    /** Deallocates the Ball's memory. */

-    method void dispose() {

-        do Memory.deAlloc(this);

-        return;

-    }

-

-    /** Shows the ball. */

-    method void show() {

-        do Screen.setColor(true);

-        do draw();

-        return;

-    }

-

-    /** Hides the ball. */

-    method void hide() {

-        do Screen.setColor(false);

-	    do draw();

-        return;

-    }

-

-    /** Draws the ball. */

-    method void draw() {

-	    do Screen.drawRectangle(x, y, x + 5, y + 5);

-	    return;

-    }

-

-    /** Returns the ball's left edge. */

-    method int getLeft() {

-        return x;

-    }

-

-    /** Returns the ball's right edge. */

-    method int getRight() {

-        return x + 5;

-    }

-

-    /** Computes and sets the ball's destination. */

-    method void setDestination(int destx, int desty) {

-        var int dx, dy, temp;

-  	    let lengthx = destx - x;

-	    let lengthy = desty - y;

-        let dx = Math.abs(lengthx);

-        let dy = Math.abs(lengthy);

-        let invert = (dx < dy);

-

-        if (invert) {

-            let temp = dx; // swap dx, dy

-            let dx = dy;

-            let dy = temp;

-   	        let positivex = (y < desty);

-            let positivey = (x < destx);

-        }

-        else {

-	        let positivex = (x < destx);

-            let positivey = (y < desty);

-        }

-

-        let d = (2 * dy) - dx;

-        let straightD = 2 * dy;

-        let diagonalD = 2 * (dy - dx);

-

-	    return;

-    }

-

-    /**

-     * Moves the ball one unit towards its destination.

-     * If the ball has reached a wall, returns 0.

-     * Else, returns a value according to the wall:

-     * 1 (left wall), 2 (right wall), 3 (top wall), 4 (bottom wall).

-     */

-    method int move() {

-

-	    do hide();

-

-        if (d < 0) { let d = d + straightD; }

-        else {

-            let d = d + diagonalD;

-

-            if (positivey) {

-                if (invert) { let x = x + 4; }

-                else { let y = y + 4; }

-            }

-            else {

-                if (invert) { let x = x - 4; }

-                else { let y = y - 4; }

-            }

-	    }

-

-        if (positivex) {

-            if (invert) { let y = y + 4; }

-            else { let x = x + 4; }

-	    }

-	    else {

-            if (invert) { let y = y - 4; }

-            else { let x = x - 4; }

-	    }

-

-	    if (~(x > leftWall)) {

-	        let wall = 1;    

-	        let x = leftWall;

-	    }

-        if (~(x < rightWall)) {

-	        let wall = 2;    

-	        let x = rightWall;

-	    }

-        if (~(y > topWall)) {

-            let wall = 3;    

-	        let y = topWall;

-        }

-        if (~(y < bottomWall)) {

-            let wall = 4;    

-	        let y = bottomWall;

-        }

-

-	    do show();

-

-	    return wall;

-    }

-

-    /**

-     * Bounces off the current wall: sets the new destination

-     * of the ball according to the ball's angle and the given

-     * bouncing direction (-1/0/1=left/center/right or up/center/down).

-     */

-    method void bounce(int bouncingDirection) {

-        var int newx, newy, divLengthx, divLengthy, factor;

-

-	    // dividing by 10 first since results are too big

-        let divLengthx = lengthx / 10;

-        let divLengthy = lengthy / 10;

-	    if (bouncingDirection = 0) { let factor = 10; }

-	    else {

-	        if (((~(lengthx < 0)) & (bouncingDirection = 1)) | ((lengthx < 0) & (bouncingDirection = (-1)))) {

-                let factor = 20; // bounce direction is in ball direction

-            }

-	        else { let factor = 5; } // bounce direction is against ball direction

-	    }

-

-	    if (wall = 1) {

-	        let newx = 506;

-	        let newy = (divLengthy * (-50)) / divLengthx;

-            let newy = y + (newy * factor);

-	    }

-        else {

-            if (wall = 2) {

-                let newx = 0;

-                let newy = (divLengthy * 50) / divLengthx;

-                let newy = y + (newy * factor);

-	        }

-	        else {

-                if (wall = 3) {

-		            let newy = 250;

-		            let newx = (divLengthx * (-25)) / divLengthy;

-                    let newx = x + (newx * factor);

-		        }

-                else { // assumes wall = 4

-		            let newy = 0;

-		            let newx = (divLengthx * 25) / divLengthy;

-                    let newx = x + (newx * factor);

-		        }

-            }

-        }

-

-        do setDestination(newx, newy);

-        return;

-    }

-}

diff --git a/projects/11/Pong/Ball.vm b/projects/11/Pong/Ball.vm
deleted file mode 100644
index 9d7b984..0000000
--- a/projects/11/Pong/Ball.vm
+++ /dev/null
@@ -1,427 +0,0 @@
-function Ball.new 0
-push constant 15
-call Memory.alloc 1
-pop pointer 0
-push argument 0
-pop this 0
-push argument 1
-pop this 1
-push argument 2
-pop this 10
-push argument 3
-push constant 6
-sub
-pop this 11
-push argument 4
-pop this 12
-push argument 5
-push constant 6
-sub
-pop this 13
-push constant 0
-pop this 14
-push pointer 0
-call Ball.show 1
-pop temp 0
-push pointer 0
-return
-function Ball.dispose 0
-push argument 0
-pop pointer 0
-push pointer 0
-call Memory.deAlloc 1
-pop temp 0
-push constant 0
-return
-function Ball.show 0
-push argument 0
-pop pointer 0
-push constant 1
-neg
-call Screen.setColor 1
-pop temp 0
-push pointer 0
-call Ball.draw 1
-pop temp 0
-push constant 0
-return
-function Ball.hide 0
-push argument 0
-pop pointer 0
-push constant 0
-call Screen.setColor 1
-pop temp 0
-push pointer 0
-call Ball.draw 1
-pop temp 0
-push constant 0
-return
-function Ball.draw 0
-push argument 0
-pop pointer 0
-push this 0
-push this 1
-push this 0
-push constant 5
-add
-push this 1
-push constant 5
-add
-call Screen.drawRectangle 4
-pop temp 0
-push constant 0
-return
-function Ball.getLeft 0
-push argument 0
-pop pointer 0
-push this 0
-return
-function Ball.getRight 0
-push argument 0
-pop pointer 0
-push this 0
-push constant 5
-add
-return
-function Ball.setDestination 3
-push argument 0
-pop pointer 0
-push argument 1
-push this 0
-sub
-pop this 2
-push argument 2
-push this 1
-sub
-pop this 3
-push this 2
-call Math.abs 1
-pop local 0
-push this 3
-call Math.abs 1
-pop local 1
-push local 0
-push local 1
-lt
-pop this 7
-push this 7
-not
-if-goto setDestination.Else0
-push local 0
-pop local 2
-push local 1
-pop local 0
-push local 2
-pop local 1
-push this 1
-push argument 2
-lt
-pop this 8
-push this 0
-push argument 1
-lt
-pop this 9
-goto setDestination.Endif0
-label setDestination.Else0
-push this 0
-push argument 1
-lt
-pop this 8
-push this 1
-push argument 2
-lt
-pop this 9
-label setDestination.Endif0
-push constant 2
-push local 1
-call Math.multiply 2
-push local 0
-sub
-pop this 4
-push constant 2
-push local 1
-call Math.multiply 2
-pop this 5
-push constant 2
-push local 1
-push local 0
-sub
-call Math.multiply 2
-pop this 6
-push constant 0
-return
-function Ball.move 0
-push argument 0
-pop pointer 0
-push pointer 0
-call Ball.hide 1
-pop temp 0
-push this 4
-push constant 0
-lt
-not
-if-goto move.Else0
-push this 4
-push this 5
-add
-pop this 4
-goto move.Endif0
-label move.Else0
-push this 4
-push this 6
-add
-pop this 4
-push this 9
-not
-if-goto move.If0.Else0
-push this 7
-not
-if-goto move.If0.Else0.Else0
-push this 0
-push constant 4
-add
-pop this 0
-goto move.If0.Else0.Endif0
-label move.If0.Else0.Else0
-push this 1
-push constant 4
-add
-pop this 1
-label move.If0.Else0.Endif0
-goto move.If0.Endif0
-label move.If0.Else0
-push this 7
-not
-if-goto move.If0.If0.Else0
-push this 0
-push constant 4
-sub
-pop this 0
-goto move.If0.If0.Endif0
-label move.If0.If0.Else0
-push this 1
-push constant 4
-sub
-pop this 1
-label move.If0.If0.Endif0
-label move.If0.Endif0
-label move.Endif0
-push this 8
-not
-if-goto move.Else1
-push this 7
-not
-if-goto move.Else1.Else0
-push this 1
-push constant 4
-add
-pop this 1
-goto move.Else1.Endif0
-label move.Else1.Else0
-push this 0
-push constant 4
-add
-pop this 0
-label move.Else1.Endif0
-goto move.Endif1
-label move.Else1
-push this 7
-not
-if-goto move.If1.Else0
-push this 1
-push constant 4
-sub
-pop this 1
-goto move.If1.Endif0
-label move.If1.Else0
-push this 0
-push constant 4
-sub
-pop this 0
-label move.If1.Endif0
-label move.Endif1
-push this 0
-push this 10
-gt
-not
-not
-if-goto move.Else2
-push constant 1
-pop this 14
-push this 10
-pop this 0
-label move.Else2
-push this 0
-push this 11
-lt
-not
-not
-if-goto move.Else3
-push constant 2
-pop this 14
-push this 11
-pop this 0
-label move.Else3
-push this 1
-push this 12
-gt
-not
-not
-if-goto move.Else4
-push constant 3
-pop this 14
-push this 12
-pop this 1
-label move.Else4
-push this 1
-push this 13
-lt
-not
-not
-if-goto move.Else5
-push constant 4
-pop this 14
-push this 13
-pop this 1
-label move.Else5
-push pointer 0
-call Ball.show 1
-pop temp 0
-push this 14
-return
-function Ball.bounce 5
-push argument 0
-pop pointer 0
-push this 2
-push constant 10
-call Math.divide 2
-pop local 2
-push this 3
-push constant 10
-call Math.divide 2
-pop local 3
-push argument 1
-push constant 0
-eq
-not
-if-goto bounce.Else0
-push constant 10
-pop local 4
-goto bounce.Endif0
-label bounce.Else0
-push this 2
-push constant 0
-lt
-not
-push argument 1
-push constant 1
-eq
-and
-push this 2
-push constant 0
-lt
-push argument 1
-push constant 1
-neg
-eq
-and
-or
-not
-if-goto bounce.If0.Else0
-push constant 20
-pop local 4
-goto bounce.If0.Endif0
-label bounce.If0.Else0
-push constant 5
-pop local 4
-label bounce.If0.Endif0
-label bounce.Endif0
-push this 14
-push constant 1
-eq
-not
-if-goto bounce.Else1
-push constant 506
-pop local 0
-push local 3
-push constant 50
-neg
-call Math.multiply 2
-push local 2
-call Math.divide 2
-pop local 1
-push this 1
-push local 1
-push local 4
-call Math.multiply 2
-add
-pop local 1
-goto bounce.Endif1
-label bounce.Else1
-push this 14
-push constant 2
-eq
-not
-if-goto bounce.If1.Else0
-push constant 0
-pop local 0
-push local 3
-push constant 50
-call Math.multiply 2
-push local 2
-call Math.divide 2
-pop local 1
-push this 1
-push local 1
-push local 4
-call Math.multiply 2
-add
-pop local 1
-goto bounce.If1.Endif0
-label bounce.If1.Else0
-push this 14
-push constant 3
-eq
-not
-if-goto bounce.If1.If0.Else0
-push constant 250
-pop local 1
-push local 2
-push constant 25
-neg
-call Math.multiply 2
-push local 3
-call Math.divide 2
-pop local 0
-push this 0
-push local 0
-push local 4
-call Math.multiply 2
-add
-pop local 0
-goto bounce.If1.If0.Endif0
-label bounce.If1.If0.Else0
-push constant 0
-pop local 1
-push local 2
-push constant 25
-call Math.multiply 2
-push local 3
-call Math.divide 2
-pop local 0
-push this 0
-push local 0
-push local 4
-call Math.multiply 2
-add
-pop local 0
-label bounce.If1.If0.Endif0
-label bounce.If1.Endif0
-label bounce.Endif1
-push pointer 0
-push local 0
-push local 1
-call Ball.setDestination 3
-pop temp 0
-push constant 0
-return
diff --git a/projects/11/Pong/Bat.jack b/projects/11/Pong/Bat.jack
deleted file mode 100644
index 340760f..0000000
--- a/projects/11/Pong/Bat.jack
+++ /dev/null
@@ -1,103 +0,0 @@
-// This file is part of www.nand2tetris.org

-// and the book "The Elements of Computing Systems"

-// by Nisan and Schocken, MIT Press.

-// File name: projects/11/Pong/Bat.jack

-

-/**

- * A graphical Pong bat. 

- * Displayed as a filled horizontal rectangle that has 

- * a screen location, a width and a height.

- * Has methods for drawing, erasing, moving left and right, 

- * and changing its width (to make the hitting action more challenging).

- * This class should have been called "paddle", following the 

- * standard Pong terminology. But, unaware of this terminology,

- * we called it "bat", and then decided to stick to it. 

- */

-class Bat {

-

-    field int x, y;           // the bat's screen location

-    field int width, height;  // the bat's width and height

-    field int direction;      // direction of the bat's movement (1 = left, 2 = right)

-

-    /** Constructs a new bat with the given location and width. */

-    constructor Bat new(int Ax, int Ay, int Awidth, int Aheight) {

-        let x = Ax;

-        let y = Ay;

-        let width = Awidth;

-        let height = Aheight;

-        let direction = 2;

-        do show();

-        return this;

-    }

-

-    /** Deallocates the object's memory. */

-    method void dispose() {

-        do Memory.deAlloc(this);

-        return;

-    }

-

-    /** Shows the bat. */

-    method void show() {

-        do Screen.setColor(true);

-        do draw();

-        return;

-    }

-

-    /** Hides the bat. */

-    method void hide() {

-        do Screen.setColor(false);

-        do draw();

-        return;

-    }

-

-    /** Draws the bat. */

-    method void draw() {

-        do Screen.drawRectangle(x, y, x + width, y + height);

-        return;

-    }

-

-    /** Sets the bat's direction (0=stop, 1=left, 2=right). */

-    method void setDirection(int Adirection) {

-        let direction = Adirection;

-        return;

-    }

-

-    /** Returns the bat's left edge. */

-    method int getLeft() {

-        return x;

-    }

-

-    /** Returns the bat's right edge. */

-    method int getRight() {

-        return x + width;

-    }

-

-    /** Sets the bat's width. */

-    method void setWidth(int Awidth) {

-        do hide();

-        let width = Awidth;

-        do show();

-        return;

-    }

-

-    /** Moves the bat one step in the bat's direction. */

-    method void move() {

-	    if (direction = 1) {

-            let x = x - 4;

-            if (x < 0) { let x = 0; }

-            do Screen.setColor(false);

-            do Screen.drawRectangle((x + width) + 1, y, (x + width) + 4, y + height);

-            do Screen.setColor(true);

-            do Screen.drawRectangle(x, y, x + 3, y + height);

-        }

-        else {

-            let x = x + 4;

-            if ((x + width) > 511) { let x = 511 - width; }

-            do Screen.setColor(false);

-            do Screen.drawRectangle(x - 4, y, x - 1, y + height);

-            do Screen.setColor(true);

-            do Screen.drawRectangle((x + width) - 3, y, x + width, y + height);

-        }

-        return;

-    }

-}

diff --git a/projects/11/Pong/Bat.vm b/projects/11/Pong/Bat.vm
deleted file mode 100644
index 77acfe4..0000000
--- a/projects/11/Pong/Bat.vm
+++ /dev/null
@@ -1,204 +0,0 @@
-function Bat.new 0
-push constant 5
-call Memory.alloc 1
-pop pointer 0
-push argument 0
-pop this 0
-push argument 1
-pop this 1
-push argument 2
-pop this 2
-push argument 3
-pop this 3
-push constant 2
-pop this 4
-push pointer 0
-call Bat.show 1
-pop temp 0
-push pointer 0
-return
-function Bat.dispose 0
-push argument 0
-pop pointer 0
-push pointer 0
-call Memory.deAlloc 1
-pop temp 0
-push constant 0
-return
-function Bat.show 0
-push argument 0
-pop pointer 0
-push constant 1
-neg
-call Screen.setColor 1
-pop temp 0
-push pointer 0
-call Bat.draw 1
-pop temp 0
-push constant 0
-return
-function Bat.hide 0
-push argument 0
-pop pointer 0
-push constant 0
-call Screen.setColor 1
-pop temp 0
-push pointer 0
-call Bat.draw 1
-pop temp 0
-push constant 0
-return
-function Bat.draw 0
-push argument 0
-pop pointer 0
-push this 0
-push this 1
-push this 0
-push this 2
-add
-push this 1
-push this 3
-add
-call Screen.drawRectangle 4
-pop temp 0
-push constant 0
-return
-function Bat.setDirection 0
-push argument 0
-pop pointer 0
-push argument 1
-pop this 4
-push constant 0
-return
-function Bat.getLeft 0
-push argument 0
-pop pointer 0
-push this 0
-return
-function Bat.getRight 0
-push argument 0
-pop pointer 0
-push this 0
-push this 2
-add
-return
-function Bat.setWidth 0
-push argument 0
-pop pointer 0
-push pointer 0
-call Bat.hide 1
-pop temp 0
-push argument 1
-pop this 2
-push pointer 0
-call Bat.show 1
-pop temp 0
-push constant 0
-return
-function Bat.move 0
-push argument 0
-pop pointer 0
-push this 4
-push constant 1
-eq
-not
-if-goto move.Else0
-push this 0
-push constant 4
-sub
-pop this 0
-push this 0
-push constant 0
-lt
-not
-if-goto move.Else0.Else0
-push constant 0
-pop this 0
-label move.Else0.Else0
-push constant 0
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 2
-add
-push constant 1
-add
-push this 1
-push this 0
-push this 2
-add
-push constant 4
-add
-push this 1
-push this 3
-add
-call Screen.drawRectangle 4
-pop temp 0
-push constant 1
-neg
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 1
-push this 0
-push constant 3
-add
-push this 1
-push this 3
-add
-call Screen.drawRectangle 4
-pop temp 0
-goto move.Endif0
-label move.Else0
-push this 0
-push constant 4
-add
-pop this 0
-push this 0
-push this 2
-add
-push constant 511
-gt
-not
-if-goto move.If0.Else0
-push constant 511
-push this 2
-sub
-pop this 0
-label move.If0.Else0
-push constant 0
-call Screen.setColor 1
-pop temp 0
-push this 0
-push constant 4
-sub
-push this 1
-push this 0
-push constant 1
-sub
-push this 1
-push this 3
-add
-call Screen.drawRectangle 4
-pop temp 0
-push constant 1
-neg
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 2
-add
-push constant 3
-sub
-push this 1
-push this 0
-push this 2
-add
-push this 1
-push this 3
-add
-call Screen.drawRectangle 4
-pop temp 0
-label move.Endif0
-push constant 0
-return
diff --git a/projects/11/Pong/Main.jack b/projects/11/Pong/Main.jack
deleted file mode 100644
index 45e2dd2..0000000
--- a/projects/11/Pong/Main.jack
+++ /dev/null
@@ -1,20 +0,0 @@
-// This file is part of www.nand2tetris.org

-// and the book "The Elements of Computing Systems"

-// by Nisan and Schocken, MIT Press.

-// File name: projects/11/Pong/Main.jack

-

-/**

- * The main class of the Pong game.

- */

-class Main {

-

-    /** Initializes a Pong game and starts running it. */

-    function void main() {

-        var PongGame game;

-        do PongGame.newInstance();

-        let game = PongGame.getInstance();

-        do game.run();

-        do game.dispose();

-        return;

-    }

-}

diff --git a/projects/11/Pong/Main.vm b/projects/11/Pong/Main.vm
deleted file mode 100644
index 94d76d7..0000000
--- a/projects/11/Pong/Main.vm
+++ /dev/null
@@ -1,13 +0,0 @@
-function Main.main 1
-call PongGame.newInstance 0
-pop temp 0
-call PongGame.getInstance 0
-pop local 0
-push local 0
-call PongGame.run 1
-pop temp 0
-push local 0
-call PongGame.dispose 1
-pop temp 0
-push constant 0
-return
diff --git a/projects/11/Pong/PongGame.jack b/projects/11/Pong/PongGame.jack
deleted file mode 100644
index 7e1ae4c..0000000
--- a/projects/11/Pong/PongGame.jack
+++ /dev/null
@@ -1,137 +0,0 @@
-// This file is part of www.nand2tetris.org

-// and the book "The Elements of Computing Systems"

-// by Nisan and Schocken, MIT Press.

-// File name: projects/11/Pong/PongGame.jack

-

-/**

- * Represents a Pong game.

- */

-class PongGame {

-

-    static PongGame instance; // the singelton, a Pong game instance     

-    field Bat bat;            // the bat

-    field Ball ball;          // the ball

-    field int wall;           // the current wall that the ball is bouncing off of.

-    field boolean exit;       // true when the game is over

-    field int score;          // the current score.

-    field int lastWall;       // the last wall that the ball bounced off of.

-

-    // The current width of the bat

-    field int batWidth;

-

-    /** Constructs a new Pong game. */

-    constructor PongGame new() {

-	    do Screen.clearScreen();

-        let batWidth = 50;  // initial bat size

-        let bat = Bat.new(230, 229, batWidth, 7);

-        let ball = Ball.new(253, 222, 0, 511, 0, 229);

-        do ball.setDestination(400,0);

-        do Screen.drawRectangle(0, 238, 511, 240);

-	    do Output.moveCursor(22,0);

-	    do Output.printString("Score: 0");

-	

-	    let exit = false;

-	    let score = 0;

-	    let wall = 0;

-	    let lastWall = 0;

-

-        return this;

-    }

-

-    /** Deallocates the object's memory. */

-    method void dispose() {

-        do bat.dispose();

-	    do ball.dispose();

-        do Memory.deAlloc(this);

-        return;

-    }

-

-    /** Creates an instance of Pong game, and stores it. */

-    function void newInstance() {

-        let instance = PongGame.new();

-        return;

-    }

-    

-    /** Returns the single instance of this Pong game. */

-    function PongGame getInstance() {

-        return instance;

-    }

-

-    /** Starts the game, and andles inputs from the user that control

-     *  the bat's movement direction. */

-    method void run() {

-        var char key;

-

-        while (~exit) {

-            // waits for a key to be pressed.

-            while ((key = 0) & (~exit)) {

-                let key = Keyboard.keyPressed();

-                do bat.move();

-                do moveBall();

-                do Sys.wait(50);

-            }

-

-            if (key = 130) { do bat.setDirection(1); }

-	        else {

-	            if (key = 132) { do bat.setDirection(2); }

-		        else {

-                    if (key = 140) { let exit = true; }

-		        }

-            }

-

-            // Waits for the key to be released.

-            while ((~(key = 0)) & (~exit)) {

-                let key = Keyboard.keyPressed();

-                do bat.move();

-                do moveBall();

-                do Sys.wait(50);

-            }

-        }

-

-	    if (exit) {

-            do Output.moveCursor(10,27);

-	        do Output.printString("Game Over");

-	    }

-            

-        return;

-    }

-

-    /**

-     * Handles ball movement, including bouncing.

-     * If the ball bounces off a wall, finds its new direction.

-     * If the ball bounces off the bat, increases the score by one

-     * and shrinks the bat's size, to make the game more challenging. 

-     */

-    method void moveBall() {

-        var int bouncingDirection, batLeft, batRight, ballLeft, ballRight;

-

-        let wall = ball.move();

-

-        if ((wall > 0) & (~(wall = lastWall))) {

-            let lastWall = wall;

-            let bouncingDirection = 0;

-            let batLeft = bat.getLeft();

-            let batRight = bat.getRight();

-            let ballLeft = ball.getLeft();

-            let ballRight = ball.getRight();

-  

-            if (wall = 4) {

-                let exit = (batLeft > ballRight) | (batRight < ballLeft);

-                if (~exit) {

-                    if (ballRight < (batLeft + 10)) { let bouncingDirection = -1; }

-                    else {

-                        if (ballLeft > (batRight - 10)) { let bouncingDirection = 1; }

-                    }

-

-                    let batWidth = batWidth - 2;

-                    do bat.setWidth(batWidth);      

-                    let score = score + 1;

-                    do Output.moveCursor(22,7);

-                    do Output.printInt(score);

-                }

-            }

-            do ball.bounce(bouncingDirection);

-        }

-        return;

-    }

-}
\ No newline at end of file
diff --git a/projects/11/Pong/PongGame.vm b/projects/11/Pong/PongGame.vm
deleted file mode 100644
index 5521919..0000000
--- a/projects/11/Pong/PongGame.vm
+++ /dev/null
@@ -1,309 +0,0 @@
-function PongGame.new 0
-push constant 7
-call Memory.alloc 1
-pop pointer 0
-call Screen.clearScreen 0
-pop temp 0
-push constant 50
-pop this 6
-push constant 230
-push constant 229
-push this 6
-push constant 7
-call Bat.new 4
-pop this 0
-push constant 253
-push constant 222
-push constant 0
-push constant 511
-push constant 0
-push constant 229
-call Ball.new 6
-pop this 1
-push this 1
-push constant 400
-push constant 0
-call Ball.setDestination 3
-pop temp 0
-push constant 0
-push constant 238
-push constant 511
-push constant 240
-call Screen.drawRectangle 4
-pop temp 0
-push constant 22
-push constant 0
-call Output.moveCursor 2
-pop temp 0
-push constant 8
-call String.new 1
-push constant 83
-call String.appendChar 2
-push constant 99
-call String.appendChar 2
-push constant 111
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 58
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 48
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-push constant 0
-pop this 3
-push constant 0
-pop this 4
-push constant 0
-pop this 2
-push constant 0
-pop this 5
-push pointer 0
-return
-function PongGame.dispose 0
-push argument 0
-pop pointer 0
-push this 0
-call Bat.dispose 1
-pop temp 0
-push this 1
-call Ball.dispose 1
-pop temp 0
-push pointer 0
-call Memory.deAlloc 1
-pop temp 0
-push constant 0
-return
-function PongGame.newInstance 0
-call PongGame.new 0
-pop static 0
-push constant 0
-return
-function PongGame.getInstance 0
-push static 0
-return
-function PongGame.run 1
-push argument 0
-pop pointer 0
-label run.While0
-push this 3
-not
-not
-if-goto run.EndWhile0
-label run.While0.While0
-push local 0
-push constant 0
-eq
-push this 3
-not
-and
-not
-if-goto run.While0.EndWhile0
-call Keyboard.keyPressed 0
-pop local 0
-push this 0
-call Bat.move 1
-pop temp 0
-push pointer 0
-call PongGame.moveBall 1
-pop temp 0
-push constant 50
-call Sys.wait 1
-pop temp 0
-goto run.While0.While0
-label run.While0.EndWhile0
-push local 0
-push constant 130
-eq
-not
-if-goto run.While0.Else1
-push this 0
-push constant 1
-call Bat.setDirection 2
-pop temp 0
-goto run.While0.Endif1
-label run.While0.Else1
-push local 0
-push constant 132
-eq
-not
-if-goto run.While0.If1.Else0
-push this 0
-push constant 2
-call Bat.setDirection 2
-pop temp 0
-goto run.While0.If1.Endif0
-label run.While0.If1.Else0
-push local 0
-push constant 140
-eq
-not
-if-goto run.While0.If1.If0.Else0
-push constant 1
-neg
-pop this 3
-label run.While0.If1.If0.Else0
-label run.While0.If1.Endif0
-label run.While0.Endif1
-label run.While0.While2
-push local 0
-push constant 0
-eq
-not
-push this 3
-not
-and
-not
-if-goto run.While0.EndWhile2
-call Keyboard.keyPressed 0
-pop local 0
-push this 0
-call Bat.move 1
-pop temp 0
-push pointer 0
-call PongGame.moveBall 1
-pop temp 0
-push constant 50
-call Sys.wait 1
-pop temp 0
-goto run.While0.While2
-label run.While0.EndWhile2
-goto run.While0
-label run.EndWhile0
-push this 3
-not
-if-goto run.Else1
-push constant 10
-push constant 27
-call Output.moveCursor 2
-pop temp 0
-push constant 9
-call String.new 1
-push constant 71
-call String.appendChar 2
-push constant 97
-call String.appendChar 2
-push constant 109
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 32
-call String.appendChar 2
-push constant 79
-call String.appendChar 2
-push constant 118
-call String.appendChar 2
-push constant 101
-call String.appendChar 2
-push constant 114
-call String.appendChar 2
-call Output.printString 1
-pop temp 0
-label run.Else1
-push constant 0
-return
-function PongGame.moveBall 5
-push argument 0
-pop pointer 0
-push this 1
-call Ball.move 1
-pop this 2
-push this 2
-push constant 0
-gt
-push this 2
-push this 5
-eq
-not
-and
-not
-if-goto moveBall.Else0
-push this 2
-pop this 5
-push constant 0
-pop local 0
-push this 0
-call Bat.getLeft 1
-pop local 1
-push this 0
-call Bat.getRight 1
-pop local 2
-push this 1
-call Ball.getLeft 1
-pop local 3
-push this 1
-call Ball.getRight 1
-pop local 4
-push this 2
-push constant 4
-eq
-not
-if-goto moveBall.Else0.Else0
-push local 1
-push local 4
-gt
-push local 2
-push local 3
-lt
-or
-pop this 3
-push this 3
-not
-not
-if-goto moveBall.Else0.Else0.Else0
-push local 4
-push local 1
-push constant 10
-add
-lt
-not
-if-goto moveBall.Else0.Else0.Else0.Else0
-push constant 1
-neg
-pop local 0
-goto moveBall.Else0.Else0.Else0.Endif0
-label moveBall.Else0.Else0.Else0.Else0
-push local 3
-push local 2
-push constant 10
-sub
-gt
-not
-if-goto moveBall.Else0.Else0.Else0.If0.Else0
-push constant 1
-pop local 0
-label moveBall.Else0.Else0.Else0.If0.Else0
-label moveBall.Else0.Else0.Else0.Endif0
-push this 6
-push constant 2
-sub
-pop this 6
-push this 0
-push this 6
-call Bat.setWidth 2
-pop temp 0
-push this 4
-push constant 1
-add
-pop this 4
-push constant 22
-push constant 7
-call Output.moveCursor 2
-pop temp 0
-push this 4
-call Output.printInt 1
-pop temp 0
-label moveBall.Else0.Else0.Else0
-label moveBall.Else0.Else0
-push this 1
-push local 0
-call Ball.bounce 2
-pop temp 0
-label moveBall.Else0
-push constant 0
-return
diff --git a/projects/11/Seven/Main.jack b/projects/11/Seven/Main.jack
deleted file mode 100644
index 067402e..0000000
--- a/projects/11/Seven/Main.jack
+++ /dev/null
@@ -1,17 +0,0 @@
-// This file is part of www.nand2tetris.org

-// and the book "The Elements of Computing Systems"

-// by Nisan and Schocken, MIT Press.

-// File name: projects/11/Seven/Main.jack

-

-/**

- * Computes the value of 1 + (2 * 3) and prints the result

- * at the top-left of the screen.  

- */

-class Main {

-

-   function void main() {

-      do Output.printInt(1 + (2 * 3));

-      return;

-   }

-

-}

diff --git a/projects/11/Seven/Main.vm b/projects/11/Seven/Main.vm
deleted file mode 100644
index a209c18..0000000
--- a/projects/11/Seven/Main.vm
+++ /dev/null
@@ -1,10 +0,0 @@
-function Main.main 0
-push constant 1
-push constant 2
-push constant 3
-call Math.multiply 2
-add
-call Output.printInt 1
-pop temp 0
-push constant 0
-return
diff --git a/projects/11/Square/Main.jack b/projects/11/Square/Main.jack
deleted file mode 100644
index 0753893..0000000
--- a/projects/11/Square/Main.jack
+++ /dev/null
@@ -1,17 +0,0 @@
-// This file is part of www.nand2tetris.org

-// and the book "The Elements of Computing Systems"

-// by Nisan and Schocken, MIT Press.

-// File name: projects/11/Square/Main.jack

-

-// (same as projects/09/Square/Main.jack)

-

-/** Initializes a new Square Dance game and starts running it. */

-class Main {

-    function void main() {

-        var SquareGame game;

-        let game = SquareGame.new();

-        do game.run();

-        do game.dispose();

-        return;

-    }

-}

diff --git a/projects/11/Square/Main.vm b/projects/11/Square/Main.vm
deleted file mode 100644
index a3b355b..0000000
--- a/projects/11/Square/Main.vm
+++ /dev/null
@@ -1,11 +0,0 @@
-function Main.main 1
-call SquareGame.new 0
-pop local 0
-push local 0
-call SquareGame.run 1
-pop temp 0
-push local 0
-call SquareGame.dispose 1
-pop temp 0
-push constant 0
-return
diff --git a/projects/11/Square/Square.jack b/projects/11/Square/Square.jack
deleted file mode 100644
index 5a92838..0000000
--- a/projects/11/Square/Square.jack
+++ /dev/null
@@ -1,110 +0,0 @@
-// This file is part of www.nand2tetris.org
-// and the book "The Elements of Computing Systems"
-// by Nisan and Schocken, MIT Press.
-// File name: projects/11/Square/Square.jack
-
-// (same as projects/09/Square/Square.jack)
-
-/** Implements a graphical square. */
-class Square {
-
-   field int x, y; // screen location of the square's top-left corner
-   field int size; // length of this square, in pixels
-
-   /** Constructs a new square with a given location and size. */
-   constructor Square new(int Ax, int Ay, int Asize) {
-      let x = Ax;
-      let y = Ay;
-      let size = Asize;
-      do draw();
-      return this;
-   }
-
-   /** Disposes this square. */
-   method void dispose() {
-      do Memory.deAlloc(this);
-      return;
-   }
-
-   /** Draws the square on the screen. */
-   method void draw() {
-      do Screen.setColor(true);
-      do Screen.drawRectangle(x, y, x + size, y + size);
-      return;
-   }
-
-   /** Erases the square from the screen. */
-   method void erase() {
-      do Screen.setColor(false);
-      do Screen.drawRectangle(x, y, x + size, y + size);
-      return;
-   }
-
-    /** Increments the square size by 2 pixels. */
-   method void incSize() {
-      if (((y + size) < 254) & ((x + size) < 510)) {
-         do erase();
-         let size = size + 2;
-         do draw();
-      }
-      return;
-   }
-
-   /** Decrements the square size by 2 pixels. */
-   method void decSize() {
-      if (size > 2) {
-         do erase();
-         let size = size - 2;
-         do draw();
-      }
-      return;
-   }
-
-   /** Moves the square up by 2 pixels. */
-   method void moveUp() {
-      if (y > 1) {
-         do Screen.setColor(false);
-         do Screen.drawRectangle(x, (y + size) - 1, x + size, y + size);
-         let y = y - 2;
-         do Screen.setColor(true);
-         do Screen.drawRectangle(x, y, x + size, y + 1);
-      }
-      return;
-   }
-
-   /** Moves the square down by 2 pixels. */
-   method void moveDown() {
-      if ((y + size) < 254) {
-         do Screen.setColor(false);
-         do Screen.drawRectangle(x, y, x + size, y + 1);
-         let y = y + 2;
-         do Screen.setColor(true);
-         do Screen.drawRectangle(x, (y + size) - 1, x + size, y + size);
-      }
-      return;
-   }
-
-   /** Moves the square left by 2 pixels. */
-   method void moveLeft() {
-      if (x > 1) {
-         do Screen.setColor(false);
-         do Screen.drawRectangle((x + size) - 1, y, x + size, y + size);
-         let x = x - 2;
-         do Screen.setColor(true);
-         do Screen.drawRectangle(x, y, x + 1, y + size);
-      }
-      return;
-   }
-
-   /** Moves the square right by 2 pixels. */
-   method void moveRight() {
-      if ((x + size) < 510) {
-         do Screen.setColor(false);
-         do Screen.drawRectangle(x, y, x + 1, y + size);
-         let x = x + 2;
-         do Screen.setColor(true);
-         do Screen.drawRectangle((x + size) - 1, y, x + size, y + size);
-      }
-      return;
-   }
-}
diff --git a/projects/11/Square/Square.vm b/projects/11/Square/Square.vm
deleted file mode 100644
index 871ccf7..0000000
--- a/projects/11/Square/Square.vm
+++ /dev/null
@@ -1,298 +0,0 @@
-function Square.new 0
-push constant 3
-call Memory.alloc 1
-pop pointer 0
-push argument 0
-pop this 0
-push argument 1
-pop this 1
-push argument 2
-pop this 2
-push pointer 0
-call Square.draw 1
-pop temp 0
-push pointer 0
-return
-function Square.dispose 0
-push argument 0
-pop pointer 0
-push pointer 0
-call Memory.deAlloc 1
-pop temp 0
-push constant 0
-return
-function Square.draw 0
-push argument 0
-pop pointer 0
-push constant 1
-neg
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 1
-push this 0
-push this 2
-add
-push this 1
-push this 2
-add
-call Screen.drawRectangle 4
-pop temp 0
-push constant 0
-return
-function Square.erase 0
-push argument 0
-pop pointer 0
-push constant 0
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 1
-push this 0
-push this 2
-add
-push this 1
-push this 2
-add
-call Screen.drawRectangle 4
-pop temp 0
-push constant 0
-return
-function Square.incSize 0
-push argument 0
-pop pointer 0
-push this 1
-push this 2
-add
-push constant 254
-lt
-push this 0
-push this 2
-add
-push constant 510
-lt
-and
-not
-if-goto incSize.Else0
-push pointer 0
-call Square.erase 1
-pop temp 0
-push this 2
-push constant 2
-add
-pop this 2
-push pointer 0
-call Square.draw 1
-pop temp 0
-label incSize.Else0
-push constant 0
-return
-function Square.decSize 0
-push argument 0
-pop pointer 0
-push this 2
-push constant 2
-gt
-not
-if-goto decSize.Else0
-push pointer 0
-call Square.erase 1
-pop temp 0
-push this 2
-push constant 2
-sub
-pop this 2
-push pointer 0
-call Square.draw 1
-pop temp 0
-label decSize.Else0
-push constant 0
-return
-function Square.moveUp 0
-push argument 0
-pop pointer 0
-push this 1
-push constant 1
-gt
-not
-if-goto moveUp.Else0
-push constant 0
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 1
-push this 2
-add
-push constant 1
-sub
-push this 0
-push this 2
-add
-push this 1
-push this 2
-add
-call Screen.drawRectangle 4
-pop temp 0
-push this 1
-push constant 2
-sub
-pop this 1
-push constant 1
-neg
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 1
-push this 0
-push this 2
-add
-push this 1
-push constant 1
-add
-call Screen.drawRectangle 4
-pop temp 0
-label moveUp.Else0
-push constant 0
-return
-function Square.moveDown 0
-push argument 0
-pop pointer 0
-push this 1
-push this 2
-add
-push constant 254
-lt
-not
-if-goto moveDown.Else0
-push constant 0
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 1
-push this 0
-push this 2
-add
-push this 1
-push constant 1
-add
-call Screen.drawRectangle 4
-pop temp 0
-push this 1
-push constant 2
-add
-pop this 1
-push constant 1
-neg
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 1
-push this 2
-add
-push constant 1
-sub
-push this 0
-push this 2
-add
-push this 1
-push this 2
-add
-call Screen.drawRectangle 4
-pop temp 0
-label moveDown.Else0
-push constant 0
-return
-function Square.moveLeft 0
-push argument 0
-pop pointer 0
-push this 0
-push constant 1
-gt
-not
-if-goto moveLeft.Else0
-push constant 0
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 2
-add
-push constant 1
-sub
-push this 1
-push this 0
-push this 2
-add
-push this 1
-push this 2
-add
-call Screen.drawRectangle 4
-pop temp 0
-push this 0
-push constant 2
-sub
-pop this 0
-push constant 1
-neg
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 1
-push this 0
-push constant 1
-add
-push this 1
-push this 2
-add
-call Screen.drawRectangle 4
-pop temp 0
-label moveLeft.Else0
-push constant 0
-return
-function Square.moveRight 0
-push argument 0
-pop pointer 0
-push this 0
-push this 2
-add
-push constant 510
-lt
-not
-if-goto moveRight.Else0
-push constant 0
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 1
-push this 0
-push constant 1
-add
-push this 1
-push this 2
-add
-call Screen.drawRectangle 4
-pop temp 0
-push this 0
-push constant 2
-add
-pop this 0
-push constant 1
-neg
-call Screen.setColor 1
-pop temp 0
-push this 0
-push this 2
-add
-push constant 1
-sub
-push this 1
-push this 0
-push this 2
-add
-push this 1
-push this 2
-add
-call Screen.drawRectangle 4
-pop temp 0
-label moveRight.Else0
-push constant 0
-return
diff --git a/projects/11/Square/SquareGame.jack b/projects/11/Square/SquareGame.jack
deleted file mode 100644
index 4fe7e39..0000000
--- a/projects/11/Square/SquareGame.jack
+++ /dev/null
@@ -1,81 +0,0 @@
-// This file is part of www.nand2tetris.org

-// and the book "The Elements of Computing Systems"

-// by Nisan and Schocken, MIT Press.

-// File name: projects/11/Square/SquareGame.jack

-

-// (same as projects/09/Square/SquareGame.jack)

-

-/**

- * Implements the Square Dance game.

- * This simple game allows the user to move a black square around

- * the screen, and change the square's size during the movement.

- * When the game starts, a square of 30 by 30 pixels is shown at the

- * top-left corner of the screen. The user controls the square as follows.

- * The 4 arrow keys are used to move the square up, down, left, and right.

- * The 'z' and 'x' keys are used, respectively, to decrement and increment

- * the square's size. The 'q' key is used to quit the game.

- */

-

-class SquareGame {

-   field Square square; // the square of this game

-   field int direction; // the square's current direction: 

-                        // 0=none, 1=up, 2=down, 3=left, 4=right

-

-   /** Constructs a new Square Game. */

-   constructor SquareGame new() {

-      // Creates a 30 by 30 pixels square and positions it at the top-left

-      // of the screen.

-      let square = Square.new(0, 0, 30);

-      let direction = 0;  // initial state is no movement

-      return this;

-   }

-

-   /** Disposes this game. */

-   method void dispose() {

-      do square.dispose();

-      do Memory.deAlloc(this);

-      return;

-   }

-

-   /** Moves the square in the current direction. */

-   method void moveSquare() {

-      if (direction = 1) { do square.moveUp(); }

-      if (direction = 2) { do square.moveDown(); }

-      if (direction = 3) { do square.moveLeft(); }

-      if (direction = 4) { do square.moveRight(); }

-      do Sys.wait(5);  // delays the next movement

-      return;

-   }

-

-   /** Runs the game: handles the user's inputs and moves the square accordingly */

-   method void run() {

-      var char key;  // the key currently pressed by the user

-      var boolean exit;

-      let exit = false;

-      

-      while (~exit) {

-         // waits for a key to be pressed

-         while (key = 0) {

-            let key = Keyboard.keyPressed();

-            do moveSquare();

-         }

-         if (key = 81)  { let exit = true; }     // q key

-         if (key = 90)  { do square.decSize(); } // z key

-         if (key = 88)  { do square.incSize(); } // x key

-         if (key = 131) { let direction = 1; }   // up arrow

-         if (key = 133) { let direction = 2; }   // down arrow

-         if (key = 130) { let direction = 3; }   // left arrow

-         if (key = 132) { let direction = 4; }   // right arrow

-

-         // waits for the key to be released

-         while (~(key = 0)) {

-            let key = Keyboard.keyPressed();

-            do moveSquare();

-         }

-     } // while

-     return;

-   }

-}

-

-

-

diff --git a/projects/11/Square/SquareGame.vm b/projects/11/Square/SquareGame.vm
deleted file mode 100644
index f2dd542..0000000
--- a/projects/11/Square/SquareGame.vm
+++ /dev/null
@@ -1,168 +0,0 @@
-function SquareGame.new 0
-push constant 2
-call Memory.alloc 1
-pop pointer 0
-push constant 0
-push constant 0
-push constant 30
-call Square.new 3
-pop this 0
-push constant 0
-pop this 1
-push pointer 0
-return
-function SquareGame.dispose 0
-push argument 0
-pop pointer 0
-push this 0
-call Square.dispose 1
-pop temp 0
-push pointer 0
-call Memory.deAlloc 1
-pop temp 0
-push constant 0
-return
-function SquareGame.moveSquare 0
-push argument 0
-pop pointer 0
-push this 1
-push constant 1
-eq
-not
-if-goto moveSquare.Else0
-push this 0
-call Square.moveUp 1
-pop temp 0
-label moveSquare.Else0
-push this 1
-push constant 2
-eq
-not
-if-goto moveSquare.Else1
-push this 0
-call Square.moveDown 1
-pop temp 0
-label moveSquare.Else1
-push this 1
-push constant 3
-eq
-not
-if-goto moveSquare.Else2
-push this 0
-call Square.moveLeft 1
-pop temp 0
-label moveSquare.Else2
-push this 1
-push constant 4
-eq
-not
-if-goto moveSquare.Else3
-push this 0
-call Square.moveRight 1
-pop temp 0
-label moveSquare.Else3
-push constant 5
-call Sys.wait 1
-pop temp 0
-push constant 0
-return
-function SquareGame.run 2
-push argument 0
-pop pointer 0
-push constant 0
-pop local 1
-label run.While0
-push local 1
-not
-not
-if-goto run.EndWhile0
-label run.While0.While0
-push local 0
-push constant 0
-eq
-not
-if-goto run.While0.EndWhile0
-call Keyboard.keyPressed 0
-pop local 0
-push pointer 0
-call SquareGame.moveSquare 1
-pop temp 0
-goto run.While0.While0
-label run.While0.EndWhile0
-push local 0
-push constant 81
-eq
-not
-if-goto run.While0.Else1
-push constant 1
-neg
-pop local 1
-label run.While0.Else1
-push local 0
-push constant 90
-eq
-not
-if-goto run.While0.Else2
-push this 0
-call Square.decSize 1
-pop temp 0
-label run.While0.Else2
-push local 0
-push constant 88
-eq
-not
-if-goto run.While0.Else3
-push this 0
-call Square.incSize 1
-pop temp 0
-label run.While0.Else3
-push local 0
-push constant 131
-eq
-not
-if-goto run.While0.Else4
-push constant 1
-pop this 1
-label run.While0.Else4
-push local 0
-push constant 133
-eq
-not
-if-goto run.While0.Else5
-push constant 2
-pop this 1
-label run.While0.Else5
-push local 0
-push constant 130
-eq
-not
-if-goto run.While0.Else6
-push constant 3
-pop this 1
-label run.While0.Else6
-push local 0
-push constant 132
-eq
-not
-if-goto run.While0.Else7
-push constant 4
-pop this 1
-label run.While0.Else7
-label run.While0.While8
-push local 0
-push constant 0
-eq
-not
-not
-if-goto run.While0.EndWhile8
-call Keyboard.keyPressed 0
-pop local 0
-push pointer 0
-call SquareGame.moveSquare 1
-pop temp 0
-goto run.While0.While8
-label run.While0.EndWhile8
-goto run.While0
-label run.EndWhile0
-push constant 0
-return
diff --git a/projects/11/Test.jack b/projects/11/Test.jack
deleted file mode 100644
index ff4bfae..0000000
--- a/projects/11/Test.jack
+++ /dev/null
@@ -1,7 +0,0 @@
-class Test{
-method void something(){
-}
-constructor Test new(){
-  do something();
-}
-}
diff --git a/projects/11/systemsub.txt b/projects/11/systemsub.txt
deleted file mode 100644
index cad8797..0000000
--- a/projects/11/systemsub.txt
+++ /dev/null
@@ -1,59 +0,0 @@
-class Math{
-function int abs(int x, int y){}
-function int multiply(int x, int y){}
-function int divide(int x, int y){}
-function int min(int x, int y){}
-function int max(int x, int y){}
-function int sqrt(int x){}
-}
-class String{
-constructor String new(int maxLength){}
-method int dispose(){}
-method int length(){}
-method char charAt(int j){}
-method void setCharAt(int j, char c){}
-method String appendChar(char c){}
-method void eraseLastChar(){}
-method int intValue(){}
-method void setInt(int val){}
-function char backSpace(){}
-function char doubleQuote(){}
-function char newLine(){}
-}
-class Array{
-function Array new(int size){}
-method void dispose(){}
-}
-class Output{
-function void moveCursor(int i, int j){}
-function void printChar(char c){}
-function void printString(String s){}
-function void printInt(int i){}
-function void println(){}
-function void backSpace(){}
-}
-class Screen{
-function void clearScreen(){}
-function void setColor(boolean b){}
-function void drawPixel(int x, int y){}
-function void drawLine(int x1, int y1, int x2, int y2){}
-function void drawRectangle(int x1, int y1, int x2, int y2){}
-function void drawCircle(int x, int y, int r){}
-}
-class Keyboard{
-function char keyPressed(){}
-function char readChar(){}
-function String readLine(String message){}
-function int readInt(String message){}
-}
-class Memory{
-function int peek(int address){}
-function void poke(int address, int value){}
-function Array alloc(int size){}
-function void deAlloc(Array o){}
-}
-class Sys{
-function void halt(){}
-function void error(int errorCode){}
-function void wait(int duration){}
-}
diff --git a/projects/11/systemsub1.txt b/projects/11/systemsub1.txt
deleted file mode 100644
index 2095728..0000000
--- a/projects/11/systemsub1.txt
+++ /dev/null
@@ -1,42 +0,0 @@
-function int Math.multiply(int x, int y)
-function int Math.divide(int x, int y)
-function int Math.min(int x, int y)
-function int Math.max(int x, int y)
-function int Math.sqrt(int x)
-constructor String String.new(int maxLength)
-method int String.dispose()
-method int String.length()
-method char String.charAt(int j)
-method void String.setCharAt(int j, char c)
-method String String.appendChar(char c)
-method void String.eraseLastChar()
-method int String.intValue()
-method void String.setInt(int val)
-function char String.backSpace()
-function char String.doubleQuote()
-function char String.newLine()
-function Array Array.new(int size)
-method void Array.dispose()
-function void Output.moveCursor(int i, int j)
-function void Output.printChar(char c)
-function void Output.printString(String s)
-function void Output.printInt(int i)
-function void Output.println()
-function void Output.backSpace()
-function void Screen.clearScreen()
-function void Screen.setColor(boolean b)
-function void Screen.drawPixel(int x, int y)
-function void Screen.drawLine(int x1, int y1, int x2, int y2)
-function void Screen.drawRectangle(int x1, int y1, int x2, int y2)
-function void Screen.drawCircle(int x, int y, int r)
-function char Keyboard.keyPressed()
-function char Keyboard.readChar()
-function String Keyboard.readLine(String message)
-function int Keyboard.readInt(String message)
-function int Memory.peek(int address)
-function void Memory.poke(int address, int value)
-function Array Memory.alloc(int size)
-function void Memory.deAlloc(Array o)
-function void Sys.halt()
-function void Sys.error(int errorCode)
-function void Sys.wait(int duration)