From 9542deeb483a00b6fabed7574720926ce97d7511 Mon Sep 17 00:00:00 2001 From: Frederick Yin Date: Tue, 16 Aug 2022 11:54:23 +0800 Subject: Projects, 01-06 completed --- projects/12/SysTest/Main.jack | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 projects/12/SysTest/Main.jack (limited to 'projects/12/SysTest') diff --git a/projects/12/SysTest/Main.jack b/projects/12/SysTest/Main.jack new file mode 100644 index 0000000..a153b25 --- /dev/null +++ b/projects/12/SysTest/Main.jack @@ -0,0 +1,31 @@ +// 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/12/SysTest/Main.jack + +/** Test program for the OS Sys class. */ +class Main { + + /** Tests the wait method of the Sys class. */ + function void main() { + var char key; + + do Output.printString("Wait test:"); + do Output.println(); + do Output.printString("Press any key. After 2 seconds, another message will be printed:"); + + while (key = 0) { + let key = Keyboard.keyPressed(); + } + while (~(key = 0)) { + let key = Keyboard.keyPressed(); + } + + do Sys.wait(2000); + + do Output.println(); + do Output.printString("Time is up. Make sure that 2 seconds elapsed."); + + return; + } +} -- cgit v1.2.3