32 lines
850 B
Plaintext
32 lines
850 B
Plaintext
// This file is part of www.nand2tetris.org
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// and the book "The Elements of Computing Systems"
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// by Nisan and Schocken, MIT Press.
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// File name: projects/12/SysTest/Main.jack
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/** Test program for the OS Sys class. */
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class Main {
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/** Tests the wait method of the Sys class. */
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function void main() {
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var char key;
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do Output.printString("Wait test:");
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do Output.println();
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do Output.printString("Press any key. After 2 seconds, another message will be printed:");
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while (key = 0) {
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let key = Keyboard.keyPressed();
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}
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while (~(key = 0)) {
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let key = Keyboard.keyPressed();
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}
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do Sys.wait(2000);
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do Output.println();
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do Output.printString("Time is up. Make sure that 2 seconds elapsed.");
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return;
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}
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}
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