Questions a bout "interrupt"

Posted by smwikipedia on Stack Overflow See other posts from Stack Overflow or by smwikipedia
Published on 2010-04-20T03:38:39Z Indexed on 2010/04/20 3:43 UTC
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Could someone help me clarify the following conecpts, and the relationship among them?

  • Maskable interrupt
  • Unmaskable interrupt
  • Hardware interrupt
  • Software interrupt
  • CPU INTR pin
  • the IF bit of EFlags register

Some specific questions:

  • What's the relationship between Maskable/Unmaskable interrupt and Hardware/Software interrupt?
  • What kind of interrupts does INTR pin detect?
  • What kind of interrupts are enabled/disabled by IF bit of EFlags register?
  • What kind of interrupts need the presence of an interrupt controller?

Many thanks.

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