1 files changed, 19 insertions, 0 deletions
diff --git a/projects/12/Sys.jack b/projects/12/Sys.jack
index bee6f67..d6b99f6 100644
--- a/projects/12/Sys.jack
+++ b/projects/12/Sys.jack
@@ -10,18 +10,37 @@ class Sys {
 
     /** Performs all the initializations required by the OS. */
     function void init() {
+        do Array.init();
+        do Keyboard.init();
+        do Math.init();
+        do Memory.init();
+        do Output.init();
+        do Screen.init();
+        do String.init();
+        do Main.main();
     }
 
     /** Halts the program execution. */
     function void halt() {
+        while (true){
+        }
+        return;
     }
 
     /** Waits approximately duration milliseconds and returns.  */
     function void wait(int duration) {
+        Output.printString("waiting")
+        let i = 0;
+        while (i < 50000){
+            let i = i + 1;
+        }
+        Output.printString("done")
     }
 
     /** Displays the given error code in the form "ERR<errorCode>",
      *  and halts the program's execution. */
     function void error(int errorCode) {
+        Output.printString("ERR");
+        Output.printInt(errorCode);
     }
 }