Array of Interrupt Vectors

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Interrupt vector table - The table containing the address of the interrupt subroutine (Cortex). On x86 processors

Addresses are written in a segment: offset and occupy one kilobytes, this table contains 256 4-byte addresses and is stored in memory starting at physical address 0 (00000h).

Each interrupt can be called programmatically - using the assembly instruction INT. The address of the DOS / Windows subprogram is in vector 33 (21H). Subroutine selection is entered by entering the corresponding number in the AH or AX register. The typical sequence of system subroutine calls is here: mov ah,2 int 21h

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