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Graphics Interchange Format  |  1996-01-18  |  133KB  |  542x546  |  8-bit (124 colors)

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OCR: Environment Subsystem 1/O Calls Status and/or Data USER MODE I/O Service Request KERNEL MODE NT System Services NT I/O Manager Layer Device Driver 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 V/O architecture.

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