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OS Development Series Update

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Hey everyone,

I have just updated the OS Development Series Tutorial 7: System Architecture.


It has been updated to include:

  • A list of all Ring-0 only privileged instructions for reference
  • Three new registers: TRP, CR8, and MSR
  • The MSR in detail, along with using RDMSR and WRMSR x86 assembly instructions
  • Breaking apart the processor (Still being worked on)

  • This is an important update, as the upcomming tutorial relies on some new concepts described in this update. More specifically, the MSR and the RDMSR and WRMSR instructions.

    The upcoming tutorial--Tutorial 12 covers basic concepts that all Kernels must work with. This includes a basic overview of:

  • Kernel: Basic Definition and Concepts
  • Levels of software, and where the Kernel stands
  • Memory Management issues, including basic overview of Virtual Address Space (VAS), Virtual Memory, MMU, and Paging)
  • Program Management Issues, including: System APIs, and System Calls, which includes Software Interrupts, Call Gates, SYSENTER/SYSRET instructions, and SYSCALL/SYSEXIT instructions
  • Error handling
  • Multitasking
  • Filesystems
  • Device Management

  • Depending on the size of this tutorial, I may or may not go over Kernel designs and implementations.

    More to come...
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