diff --git a/boot.php b/boot.php
index d2e7cfe..a218f31 100644
--- a/boot.php
+++ b/boot.php
@@ -10,7 +10,7 @@
 }
 unset($autoload);
 
-use GameBoy\Canvas\TerminalCanvas;
+use GameBoy\Canvas\SdlCanvas;
 use GameBoy\Core;
 use GameBoy\Keyboard;
 
@@ -44,7 +44,7 @@
 
 $rom = file_get_contents($filename);
 
-$canvas = new TerminalCanvas();
+$canvas = new SdlCanvas();
 $core = new Core($rom, $canvas);
 $keyboard = new Keyboard($core);
 
diff --git a/src/Canvas/SdlCanvas.php b/src/Canvas/SdlCanvas.php
new file mode 100644
index 0000000..4bf0519
--- /dev/null
+++ b/src/Canvas/SdlCanvas.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace GameBoy\Canvas;
+
+use GameBoy\Settings;
+
+class SdlCanvas implements DrawContextInterface
+{
+    private $serial = 0;
+    public $colorEnabled = true;
+    public $sdl;
+    public $renderer;
+    public $pixels;
+    public $greenoffset = 0;
+
+    public function __construct() {
+
+  		$this->sdl = SDL_CreateWindow('PHP TerminalGameboy', SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 576, SDL_WINDOW_SHOWN);
+  		$this->renderer = SDL_CreateRenderer($this->sdl, 0, SDL_RENDERER_SOFTWARE);
+  		SDL_SetRenderDrawColor($this->renderer, 0, 0, 0, 255);
+  		SDL_RenderClear($this->renderer);
+
+    }
+    public function draw($canvasBuffer)
+    {
+      //print_r($canvasBuffer); die();
+      //echo count($canvasBuffer);
+        if(count($canvasBuffer) > 0) {
+            for ($y = 0; $y < 144; $y++) {
+                for ($x = 0; $x < 160; $x++) {
+                    $index = ($x + ($y * 160))*4;
+                    if($canvasBuffer[$index] != "") {
+                        $fill = [$canvasBuffer[$index], $canvasBuffer[$index+1], $canvasBuffer[$index+2]];
+                        if(!isset($this->pixels[$x][$y])) {
+                          $this->pixels[$x][$y] = new \SDL_Rect($x*4, $y*4, 4, 4);
+                        }
+                        SDL_SetRenderDrawColor($this->renderer, $fill[0], $fill[1], $fill[2], 255);
+                        SDL_RenderFillRect($this->renderer, $this->pixels[$x][$y]);
+                    }
+
+                  }
+          }
+          SDL_RenderPresent($this->renderer);
+        }
+    }
+}
diff --git a/src/Core.php b/src/Core.php
index 3423d2f..4d87e3a 100644
--- a/src/Core.php
+++ b/src/Core.php
@@ -289,7 +289,7 @@ class Core
 
     public $bgEnabled = true;
 
-    public $spritePriorityEnabled = true;
+    public $spritePriorityEnabled = 0x80;
 
     // true if there are any images to be invalidated
     public $tileReadState = [];
@@ -1072,6 +1072,7 @@ public function executeIteration()
                     // no break
                 case 2:
                     $this->untilEnable--;
+                    usleep(1000);
                     // no break
             }
             //Execute Interrupt:
diff --git a/src/Keyboard.php b/src/Keyboard.php
index 85001ae..c0b0ef9 100644
--- a/src/Keyboard.php
+++ b/src/Keyboard.php
@@ -5,20 +5,29 @@
 class Keyboard
 {
     public $core;
+    public $event;
     public $file;
+    public $keymap;
     public $keyPressing = null;
     public $started = false;
+    public $close = 0;
 
     public function __construct(Core $core)
     {
         $this->core = $core;
-        exec('stty -icanon -echo');
-        $this->file = fopen('php://stdin', 'r');
-        stream_set_blocking($this->file, false);
+        $this->event = new \SDL_Event;
+        $this->keymap =
+        [
+          "119"=>'w',"97"=>'a',"115"=>'s',"100"=>'d',"110"=>'n',"109"=>'m',"44"=>',',"46"=>'.'
+        ];
+        //exec('stty -icanon -echo');
+        //$this->file = fopen('php://stdin', 'r');
+        //stream_set_blocking($this->file, false);
     }
 
     public function check()
     {
+      /*
         $key = fread($this->file, 1);
 
         if (!empty($key)) {
@@ -28,6 +37,28 @@ public function check()
         }
 
         $this->keyPressing = $key;
+        */
+        while( SDL_PollEvent( $this->event ) ){
+  		    /* We are only worried about SDL_KEYDOWN and SDL_KEYUP events */
+          if(isset($this->event->key->keysym)) {
+          if(isset($this->keymap[$this->event->key->keysym->sym])) {
+            $key = $this->keymap[$this->event->key->keysym->sym];
+    		    switch($this->event->type){
+    		      case SDL_KEYDOWN:
+                $this->keyDown($key);
+                echo "SDL_KEYDOWN ".$this->event->key->keysym->sym."\n";
+    		        break;
+    		      case SDL_KEYUP:
+    					  $this->keyUp($key);
+                echo "SDL_KEYUP ".$this->event->key->keysym->sym."\n";
+    						break;
+    		      default:
+    		        break;
+    		    }
+            $this->keyPressing = $key;
+          } }
+          break;
+  		  }
     }
 
     public function matchKey($key)