Nobutaka Nishigaki

Computer system having detachable expansion unit

Computer system capable of connecting expansion unit

Connection state confirmation system and method for expansion unit

Apparatus for controlling internal heat generating circuit

Method of switching video sources and computer system employing this method

Method and apparatus for controlling internal heat generating circuit

Computer system having expansion unit

Personal computer system allowing selective use of built-in and external keyboards by means of selector

Computer system for avoiding coincidence of port address on a bus during expansion

Method of switching video source transferred by using zv port, and computer system using the method