Piper hesitated, gazing at Rico, trying to read his sphinx-like expression, then took a deep breath and said, "Roaches duplicate everything in memory, themselves included, till there's no more room left, this one got into my operating code and... it started laying eggs. That's why I kept getting locked out. Memory was jammed. I couldn't power up. I had to jack in with pother deck and go over everything with a microscanner."