80x86 Slides
Privilege levels for the 80286 microprocessor
Protected mode addressing using a selector
Addressing memory data in protected mode
80386 paging mechanism
Windows NT Slides
NT supports multithreading within individual tasks
NT symmetric multiprocessing (SMP)
Kernel mode vs. User mode
NT executive architecture (kernel mode)
Multiple message queues prevent bottlenecks
NT user-mode environment subsystems
NT VDMs use the 386 virtual 8086 mode
VDMs are preemptively multitasked in protected mode
DOS VDMs use the Win32 subsystem
WOW 16-bit cooperative multitasking
WOW VDMs use the Win32 subsystem
Separate WOWs provide 16-bit preemptive multitasking
NT is object-oriented
Local procedure calls (LPCs)
Security subsystem (user mode)
NT security reference monitor subsystem (kernel mode)
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