Interrupt/Exception Generation and Handling
Introduction
The topic of interrupts was covered in the chapter entitled “Interrupts and Exceptions” on page 251. Basically, interrupts fall into two categories:
Hardware-initiated interrupts.
Software-initiated interrupts or exceptions.
Software interrupts/exceptions can be further divided into two categories:
Software exceptions that result from an error while attempting to execute an instruction.
Software interrupts that result from the execution of a software interrupt instruction (i.e., INT nn, INTO, INT3, or BOUND).
In all of these cases, the interrupt or exception type provides a one-byte index into the Interrupt Descriptor Table (IDT; see Figure 15-8 on page 349), selecting an IDT entry (1-of-256d). ...
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