DOS ain't dead - Basics of interrupt chaining?

Basics of interrupt chaining? (Developers)

posted by bretjohn , Rio Rancho, NM, 14.12.2012, 19:43

> Or is CALL better?

Most of the time, for IRQ (hardware interrupt) handlers a JMP is better than a CALL. There are special circumstances (usually timing related) where you may need to use a CALL, though. When that happens, things get complicated -- you may need to queue requests and process them later time, or sometimes you may even be able to ignore requests and not process them at all. It just depends on exactly what the application requires.

For your particular application, though, you probably don't need to worry about any of that.

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Complete thread:

Basics of interrupt chaining? - myrkraverk, 13.12.2012, 19:39 (Developers)
- Basics of interrupt chaining? - myrkraverk, 13.12.2012, 20:19
- Basics of interrupt chaining? - Japheth, 13.12.2012, 21:31
  - And now: int 0x21 in hw interrupt handler? - myrkraverk, 14.12.2012, 02:58
    - And now: int 0x21 in hw interrupt handler? - Japheth, 14.12.2012, 06:10
    - And now: int 0x21 in hw interrupt handler? - tom, 14.12.2012, 18:25
    - And now: int 0x21 in hw interrupt handler? - bretjohn, 15.12.2012, 01:29
      - And now: int 0x21 in hw interrupt handler? - myrkraverk, 15.12.2012, 15:52
        And now: int 0x21 in hw interrupt handler? - bretjohn, 17.12.2012, 18:08
        And now: int 0x21 in hw interrupt handler? - myrkraverk, 18.12.2012, 20:16
        And now: int 0x21 in hw interrupt handler? - tom, 19.12.2012, 15:54
- Basics of interrupt chaining? - bretjohn, 14.12.2012, 19:43