| 摘要 |
A personal computer system capable of connecting to an expansion unit is designed to eliminate the need for a user to set the I/O address and interrupt level of an I/O controller to be connected to the expansion unit, thereby reducing the operational tasks of the user. In this respect, in the BIOS (Basic Input/Output System) is provided a program, which checks the connection status of the expansion unit to the system when power is on, and disables an I/O controller incorporated in the computer main frame and sets the I/O controller connected to the expansion unit to the desired configuration upon judging that the expansion unit is connected. Even when the expansion unit is connected after power is cut off in resume mode, therefore, the expansion unit can be used without forcing the user to set the mode back to a boot mode.
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