finished random number generator

- used the simple method here: https://www.coursera.org/learn/nand2tetris2/discussions/weeks/3/threads/LiyUrABwEee0IhLPmsG3Vg/replies/1MWytACWEeeMVQ6gf1FxsA
- game crashes around turn 192. will investigate that after learning
about the compiler

2 files changed, 173 insertions, 30 deletions

diff --git a/projects/09/K/Board.jack b/projects/09/K/Board.jack
index cea3ae6..49d42d5 100644
--- a/projects/09/K/Board.jack
+++ b/projects/09/K/Board.jack
@@ -1,6 +1,7 @@
 class Board {
     field Array grid;
     field int nTurn;
+    field int seed;
 
     constructor Board new() {
         var int i, j;
@@ -20,6 +21,7 @@ class Board {
         let t = grid[0];
         let t[0] = 65;
         let nTurn = 0;
+        let seed = 0;
         return this;
     }
 
@@ -195,33 +197,43 @@ class Board {
 
     method void addTile(){
         var Array t;
+        var int r, c, parity, newTile;
+        /*
         let t = grid[1];
         if (t[1] = 32) {
             let t[1] = 65;
         }
-        return;
-        /*
-        var int x, y, r, c;
-        var char z;
-        var Array t;
-        let x = nTurn;
-        let y = 23 * x * x + 79;
-        let x = y - (y / 16 * 16);
-        let r = x / 4;
-        let c = x - (r * 4);
-        let z = 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];
-        while (t[c] > 64) {
-            let y = 23 * x * x + 79;
-            let x = y - (y / 16 * 16);
-            let r = x / 4;
-            let c = x - (r * 4);
-            let z = 131 - z;
+        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] = z;
+        let t[c] = newTile;
         return;
-        */
     }
 
     method void transform(char dir){
@@ -279,6 +291,10 @@ class Board {
             do Output.printString("|");
             let i = i + 1;
         }
+
+        do Output.moveCursor(r + 6, c - 2);
+        do Output.printString("Turn: ");
+        do Output.printInt(nTurn);
         return;
     }
 
diff --git a/projects/09/K/Board.vm b/projects/09/K/Board.vm
index ce1e791..3b5983c 100644
--- a/projects/09/K/Board.vm
+++ b/projects/09/K/Board.vm
@@ -1,5 +1,5 @@
 function Board.new 3
-push constant 2
+push constant 3
 call Memory.alloc 1
 pop pointer 0
 push constant 4
@@ -72,6 +72,8 @@ push temp 0
 pop that 0
 push constant 0
 pop this 1
+push constant 0
+pop this 2
 push pointer 0
 return
 function Board.arrange 0
@@ -894,34 +896,132 @@ return
 label IF_FALSE6
 push argument 1
 return
-function Board.addTile 1
+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
+if-goto IF_TRUE0
+goto IF_FALSE0
+label IF_TRUE0
+push this 2
+neg
+pop this 2
+label IF_FALSE0
+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
+if-goto IF_TRUE1
+goto IF_FALSE1
+label IF_TRUE1
+push constant 1
+pop local 3
+goto IF_END1
+label IF_FALSE1
 push constant 1
+neg
+pop local 3
+label IF_END1
+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 local 1
 push this 0
 add
 pop pointer 1
 push that 0
 pop local 0
-push constant 1
+push constant 65
+pop local 4
+label WHILE_EXP0
+push local 2
 push local 0
 add
 pop pointer 1
 push that 0
-push constant 32
-eq
-if-goto IF_TRUE0
-goto IF_FALSE0
-label IF_TRUE0
-push constant 1
+push constant 64
+gt
+not
+if-goto WHILE_END0
+push this 2
+push local 3
+add
+pop this 2
+push this 2
+push constant 0
+lt
+if-goto IF_TRUE2
+goto IF_FALSE2
+label IF_TRUE2
+push constant 15
+pop this 2
+label IF_FALSE2
+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 local 1
+push this 0
+add
+pop pointer 1
+push that 0
+pop local 0
+push constant 131
+push local 4
+sub
+pop local 4
+goto WHILE_EXP0
+label WHILE_END0
+push local 2
 push local 0
 add
-push constant 65
+push local 4
 pop temp 0
 pop pointer 1
 push temp 0
 pop that 0
-label IF_FALSE0
 push constant 0
 return
 function Board.transform 4
@@ -1138,6 +1238,33 @@ add
 pop local 2
 goto WHILE_EXP0
 label WHILE_END0
+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