DOCERR: Passing Reference Data to a Hardware Interrupt Handler

Last reviewed: June 20, 1996
Article ID: Q152541

The information in this article applies to:

Microsoft Win32 Device Driver Kit (DDK) for Windows 95, version 4.0

SUMMARY

The Windows 95 DDK documentation for the VPICD_IRQ_Descriptor structure lists an element called VID_Hw_Int_Ref that is used for reference data that the system passes to the hardware interrupt handler. The documentation also states that the VID_Options bit VPICD_OPT_Ref_Data must be set in order for the data to be passed to the handler.

The documentation does not mention how the hardware interrupt handler accesses this reference data. When the handler is called, the edx register will point to the reference data.

REFERENCES

See the Windows 95 DDK for more information on the VPICD_IRQ_Descriptor structure.

Additional reference words: 4.00
KBCategory: kbprg kbdocerr
KBSubcategory: DdkVpicd

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Last reviewed: June 20, 1996
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