## Physical Device Driver Reference

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### Handling ABIOS Requests

Refer to Writing a Physical Device Driver Using Advanced BIOS for information on handling requests to ABIOS. A physical device driver must assume that it owns all outstanding ABIOS request blocks for a given Logical ID. During interrupt-time processing, the physical device driver must call ABIOS for each outstanding request that is incomplete-waiting-on- interrupt. This is one of the reasons that a Logical ID is not shared among physical device drivers.