checkpoint

- finished Array
- finished Sys
- revised Memory

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);

     }

 }