Input/Output

  • Sen-Cuo Ro
  • Sheau-Chuen Her
  • Rajvir Singh

Abstract

Many peripheral devices can be connected to the i386/i486 machine. The communications between these devices and the i386/i486 are through I/O addresses. The I/O address can carry data, present the status of the peripheral devices, or control the peripheral devices. This chapter discusses the I/O addresses (I/O port address and memory I/O address) and the I/O port protection mechanism (I/O privilege level protection and I/O permission bit map protection) provided by the i386/i486 processor.

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Copyright information

© Van Nostrand Reinhold 1993

Authors and Affiliations

  • Sen-Cuo Ro
    • 1
  • Sheau-Chuen Her
    • 1
  • Rajvir Singh
    • 2
  1. 1.Nexgen MicrosystemsUSA
  2. 2.Automata Publishing CompanySan JoseUSA

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