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An interrupt vector table (IVT) is a data structure that associates a list of interrupt handlers with a list of interrupt requests in a table of interrupt vectors. Each entry of the interrupt vector table, called an interrupt vector, is the address of an interrupt handler (also known as ISR). While the concept is common across processor ...
The interrupt descriptor table (IDT) is a data structure used by the x86 architecture to implement an interrupt vector table. The IDT is used by the processor to determine the memory addresses of the handlers to be executed on interrupts and exceptions. The details in the description below apply specifically to the x86 architecture.
On x86 CPUs, when an interrupt occurs, the ISR to call is found by looking it up in a table of ISR starting-point addresses (called "interrupt vectors") in memory: the Interrupt vector table (IVT). An interrupt is invoked by its type number, from 0 to 255, and the type number is used as an index into the Interrupt Vector Table, and at that ...
Load IDTR (Interrupt Descriptor Table Register) from memory. [ b ] The IDTR controls not just the address/size of the IDT ( interrupt Descriptor Table ) in protected mode , but the IVT (Interrupt Vector Table) in real mode as well.
The program counter is loaded from the ABORT vector (see tables). As the address pushed to the stack is that of the aborted instruction rather than the contents of the program counter, executing an RTI ( R e T urn from I nterrupt) following an ABORT interrupt will cause the processor to return to the aborted instruction, rather than the next ...
In particular, MSI allows the device to write a small amount of interrupt-describing data to a special memory-mapped I/O address, and the chipset then delivers the corresponding interrupt to a processor. [1] [2] [3] A common misconception with MSI is that it allows the device to send data to a processor as part of the interrupt.
Ralf Brown's Interrupt List (aka RBIL, x86 Interrupt List, MS-DOS Interrupt List or INTER) is a comprehensive list of interrupts, calls, hooks, interfaces, data structures, CMOS settings, memory and port addresses, as well as processor opcodes for x86 machines from the 1981 IBM PC up to 2000 (including many clones), [1] [2] [nb 1] most of it still applying to IBM PC compatibles today.
Interrupt Vector Table of x86 processors running in real mode. Arrows indicate direction of increasing addresses. Date: 23 August 2014, 12:56 (UTC) Source: Hand-written SVG. Author: Keφr: Permission (Reusing this file) Released into public domain.