#include <stdio.h>
#include <dos.h>
#include <math.h>


int main() {    
    unsigned char var1;
    unsigned int x;
    volatile unsigned char __far *screenptr = 0xA000 :> 0x0000; 

    union REGPACK regs;    
   
    regs.h.ah = 0x00;
    regs.h.al = 0x13;
    intr (0x10, &regs);
   
 
    for (x=0 ; x < 16384 ; x++)
    {
        var1 = rand() & 255;
        screenptr[x] = var1;
    }

    delay(2500);

    regs.h.ah = 0x00;
    regs.h.al = 0x00;
    intr (0x10, &regs);

    printf("It looks like everything went right.\n");
    delay(1500);
    return 0;
}