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Graphics Interchange Format  |  1996-06-12  |  109KB  |  542x546  |  4-bit (16 colors)

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OCR: Environment Subsystem I/O Calls Status and/or Data USER MODE 1/O Service Request KERNEL MODE NT System Services NT I/O Manager Layer Device Dniver 1 Send IRP Create IRP Call Next Driver Layer Device Driver 2 Send IRP Call Next Driver Layer Device Driver N Send IRP Retum Status/Data Dispose IRP Access Hardware NT Hardware abstraction Layer Physical Device Figure 2: NT I/O architecture.

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