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Graphics Interchange Format  |  1996-06-12  |  106.6 KB  |  542x546  |  4-bit (16 colors)
   ocr: Environment SubsystemiO Calls Status and/or. Data USER MODE 10 Service Request KERNEL MODE NT System Services NT VO Manager SendIRP Create, IRP Layer Device Driver 1 Call Next Driver: Send IRP Layer Device Driver 2 Call Next Driver Send IRP Layer Device Driver N Dispose IRP Retum Status/Data Access Hardware. NT Haraware-abstraction Layer Physical Device Figure 2: NTVO architecture.