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

  emulator.fs9p.update_file = async function(file,data){

      const p = this.SearchPath(file);

      if(p.id === -1)
      {
          return Promise.resolve(null);
      }
      
      const inode = this.GetInode(p.id);
      const buf   = typeof data == 'string' ? isoterminal.toUint8Array(data) : data
      await this.Write(p.id,0, buf.length, buf )
      // update inode
      inode.size = buf.length
      const now = Math.round(Date.now() / 1000);
      inode.atime = inode.mtime = now;
      return new Promise( (resolve,reject) => resolve(buf) )

  }

  emulator.fs9p.append_file = async function(file,data){

      const p = this.SearchPath(file);

      if(p.id === -1)
      {
          return Promise.resolve(null);
      }
      
      const inode = this.GetInode(p.id);
      const buf   = typeof data == 'string' ? isoterminal.toUint8Array(data) : data
      await this.Write(p.id, inode.size, buf.length, buf )
      // update inode
      inode.size = inode.size + buf.length
      const now = Math.round(Date.now() / 1000);
      inode.atime = inode.mtime = now;
      return new Promise( (resolve,reject) => resolve(buf) )

  }

})