## Virtual Device Driver Reference for OS/2

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### VDHOpenVIRQ Parameter - EOIHandler

EOIHandler (PFN) Address of End-Of-Interrupt (EOI) handler.

Linear address of the handler to be called when EOI is received by VPIC from a DOS session for the IRQ. If this is not desired, put a 0 (zero) in this parameter. Note that the IRQ is no longer "in service" (the ISR bit has been cleared) when the virtual device driver's EOI handler is called. The interface to the EOI handler is:

    VOID HOOKENTRY EOIHdlr(pcrf)

        ENTRY   pcrf - Pointer to client register frame

        EXIT    None

        USES    EAX, ECX, EDX, FS, GS, Flags

        CONTEXT DOS session-task