What is Interrupt vector Table?
Hi,
What is Interrupt vector Table?
Please explain in detail; your help is highly appreciated.
Thanks.
Hi,
What is Interrupt vector Table?
Please explain in detail; your help is highly appreciated.
Thanks.
Dear Rizwan,
This vector has the tables of pointers' functions to routine functions having addressable memory and when the interrupt request arrives it is saved in the processor. This table is also called a dispatch table.
It has consecutive offset and segment entries with the interrupt handler. We can also establish our own interrupt handlers and can use them for programming certain tasks. Each interrupt takes a 4 byte value.
This table is a mandatory feature and provision of INTEL 8086 OR 8088 processors. A maximum number of 256 vector tables storing capacity is present in a vector table. We can say that different locations are in it and having the different tables or parameters can jump from one space to another space under certain interruptions.
I am also attaching some tables for further more learning regarding of these tables.
Hope this data will help you to understand the interrupt vector table.
Regards,
RAZA SHAIKH
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In computing, an interrupt vector is a memory address of an interrupt handler or an index into an array called interrupt vector table.
An Interrupt vector table is a table of interrupt vectors (pointers to routine that handle interrupts). Each interrupt number is reserved for specific use.
An example of an interrupt vector table is the 16 vectors that are reserved for 16IRQ lines. An interrupt vector table is also called a DISPATCH Table.
The interrupt vector table is located in the memory at 0000:0000h. Although it is one of the memory areas frequently used by DOS, It is also available for your own programs. There are two important reasons why you'd want to access IVT:
1.To  get information from it.
2.To change certain information from it.
To avoid possible catastrophes: