Table of Contents
What is the purpose of an interrupt vector table?
The interrupt vector table is a table of memory addresses of interrupt/exception handler routines. In other words, it defines where the code of a particular interrupt/exception routine is located in microcontroller memory.
What is an interrupt vector table and the size is it?
On the x86 architecture, the Interrupt Vector Table (IVT) is a table that specifies the addresses of all the 256 interrupt handlers used in real mode. The IVT is typically located at 0000:0000H, and is 400H bytes in size (4 bytes for each interrupt).
What is an interrupt vector table in 8086 microprocessor?
The interrupt vector (or interrupt pointer) table is the link between an interrupt type code and the procedure that has been designated to service interrupts associated with that code. 8086 supports total 256 types i.e. 00H to FFH. For each type it has to reserve four bytes i.e. double word.
Where does the interrupt vector table resides?
1 Answer. On a PC the interrupt vector table (IVT) is always located in RAM. By default it’s located at 0000:0000 at the start of memory, but it’s possible to move it using the LIDT instruction.
What is interrupt number?
When registering interrupts the driver must provide the system with an interrupt number. This interrupt number identifies the interrupt specification for which the driver is registering a handler. A communications controller may have one interrupt for receive ready and one for transmit ready. …
What is meant by interrupt vector table?
The interrupt vector table is a table of memory addresses of interrupt/exception handler routines. In other words, it defines where the code of a particular interrupt/exception routine is located in microcontroller memory.
What is the purpose of an interrupt vector?
An interrupt vector is the memory location of an interrupt handler, which prioritizes interrupts and saves them in a queue if more than one interrupt is waiting to be handled.
What is a vector table?
You remember that a vector is a pair of memory locations that hold the address of a routine. A vector table is, quite simply, a table of vectors.