ISOTerminal.prototype.redirectConsole = function(handler){
   const log = console.log;
   const dir = console.dir;
   const err = console.error;
   const warn = console.warn;
   console.log = (...args)=>{
       const textArg = args[0];
       handler(textArg+'\n');
       log.apply(log, args);
   };
   console.error = (...args)=>{
       const textArg = args[0].message?args[0].message:args[0];
       handler( textArg+'\n', '\x1b[31merror\x1b[0m');
       err.apply(log, args);
   };
   console.dir = (...args)=>{
       const textArg = args[0].message?args[0].message:args[0];
       handler( JSON.stringify(textArg,null,2)+'\n');
       dir.apply(log, args);
   };
   console.warn = (...args)=>{
       const textArg = args[0].message?args[0].message:args[0];
       handler(textArg+'\n','\x1b[38;5;208mwarn\x1b[0m');
       err.apply(log, args);
   };

}

ISOTerminal.addEventListener('emulator-started', function(){
  let emulator = this.emulator

  this.redirectConsole( (str,prefix) => {
    let finalStr = ""
    prefix = prefix ? prefix+' ' : ' '
    str.trim().split("\n").map( (line) => {
      finalStr += '\x1b[38;5;165m/dev/browser: \x1b[0m'+prefix+line+'\n'
    })
    emulator.fs9p.append_file( "console", finalStr )
  })

  window.addEventListener('error', function(event) {
    console.error(event.filename+":"+event.lineno+":"+event.colno)
    console.error(event.message);
    console.error(event.error);
  });

  window.addEventListener('unhandledrejection', function(event) {
    console.error('Unhandled promise rejection:')
    console.error(event.reason);
  });

  // enable/disable logging file (echo 1 > mnt/console.tty) 
  this.readFromPipe( '/mnt/console.tty', (data) => {
    emulator.log_to_tty = ( String(data).trim() == '1')
  })

})