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The hardware of PC computers additionally limited device expansion options because interrupts could not be shared, and some multifunction expansion cards would use multiple interrupts for different card functions, such as a dual-port serial card requiring a separate interrupt for each serial port.
Because of this complex operating environment, the
|url=https://www.techspot.com/community/topics/plug-and-play-overview-how-windows-finds-drivers-for-usb-devices.127886
|title=Plug and Play Overview: How Windows Finds Drivers for USB Devices
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