MyConsole.java

package nachos.myproj;

import nachos.machine.Machine;
import nachos.threads.Semaphore;

public class MyConsole{
    Semaphore sem;
    String text;
    public MyConsole(){
        Machine.console().setInterruptHandlers(new Runnable() {

            @Override
            public void run() {
                // recv
                int karakter = Machine.console().readByte();
                if(karakter == 10){
                    sem.V();
                    return;
                }
                text+= (char)karakter;
            }
        }, new Runnable() {

            @Override
            public void run() {
                // sent
                sem.V();
            }
        });

    }
    public String readLine(){
        text = "";
        Machine.console().readByte();
        sem = new Semaphore(0);
        sem.P();

        return text;
    }

    public void writeLine(String text){
        for(int i=0;i<text.length();i++){
            Machine.console().writeByte(text.charAt(i));
            sem = new Semaphore(0);
            sem.P();
        }
    }

}