Computer able to determine whether or not a display is connected to it, in accordance with the status data stored in a register, and method of detecting whether or not a display is connected to a computer

摘要

A computer comprising a main body, a connector having pins for connecting an external display to the main body, a register for storing data representing a first status or a second status in accordance with the voltage of specified ones of the pins of said connector means, and a display controller for controlling the external display. The computer further comprises a data-reading section for repeatedly reading the data stored in the register and counting the number of times the data representing the first status is read from said register means, and detecting section for determining that the external display is connected to the connector when the number of times the data representing the first status is read from the register reaches a prescribed value.