#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <dos.h>

int main(void)
{
    unsigned long far* ptrIVT = (unsigned long far*)0x00000000;
    unsigned int uiSegment;
    unsigned int uiOffset;

    int iCount;

    FILE* oFile = fopen("IVT.txt", "wt");

    if (oFile == NULL)
    {
        clrscr();
        printf("Error : Unable to create IVT.txt file.");
        printf("Press any key to exit.");
        getch();
        exit(1);
    }

    fprintf(oFile, "Interrupt Number  --->  Vector (Segment:Offset)\n");
    fprintf(oFile, "    ( Hex )                 ( Hex )   \n\n");
    for (iCount = 0; iCount < 256; iCount++)
    {
        uiSegment = FP_SEG(*ptrIVT);
        uiOffset = FP_OFF(*ptrIVT);
        fprintf(oFile, "   INT 0x%02X       --->    %4X : %X \n", iCount, uiSegment, uiOffset);
        ptrIVT++;
    }

    fclose(oFile);
    return 0;
}