Hardware program to inverse the status of caps, num and scroll lock

This is a hardware program to inverse the status of the caps, num and scroll lock. If you have any doubts please let me know.

#include<stdio.h>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

int main()

{

int c,n,s;

int far *p=(int far *)0x417;

int far *q=(int far *)0x418;

char text[50];

union REGS in, out;

clrscr();

c=*p&0x40;

s=*p&0x10;

n=*p&0x20;

if (c==0x40)

                        printf("\nCaps lock is ON");

else

                        printf("\nCaps lock is OFF");

if(n==0x20)

                        printf("\nNum lock is OFF");

else

                        printf("\nNum lock is ON");

if(s==0x10)

                        printf("\nScroll lock is ON");

else

                        printf("\nScroll lock is OFF");

printf("\nText before toggle: ");

gets(text);

*p=*p^0x70;

*q=*q^0x70;

printf("\nTOGGLE\n");

c=*p&0x40;

s=*p&0x10;

n=*p&0x20;

if (c==0x40)

                        printf("\nCaps lock is ON");

else

                        printf("\nCaps lock is OFF");

if(n==0x20)

                        printf("\nNum lock is OFF");

else

                        printf("\nNum lock is ON");

if(s==0x10)

                        printf("\nScroll lock is ON");

else

                        printf("\nScroll lock is OFF");

printf("\nText after toggle: ");

gets(text);

printf("\n Press any key to exit");

getch();

return 0;

}

Hardware program to implement the filling of a rectangle with a click

This is a hardware program to implement the filling of a rectangle on a click. If you have any doubts, please let me know. 

#include<graphics.h>

#include<stdlib.h>

#include<stdio.h>

#include<conio.h>

#include<dos.h>

int main(void)

{

    clrscr();

   int gdriver = DETECT, gmode;

   int left, top, right, bottom,c,poly[8],x,y;

   union REGS in,out;

   initgraph(&gdriver, &gmode, "c:\\turboc3\\bgi ");

   left = getmaxx() / 2 - 50;

   top = getmaxy() / 2 - 50;

   right = getmaxx() / 2 + 50;

   bottom = getmaxy() / 2 + 50;

   rectangle(left,top,right,bottom);

   in.x.ax=7;

   in.x.cx=left;

   in.x.dx=right;

   int86(0x33,&in,&out);

   in.x.ax=8;

   in.x.cx=top;

   in.x.dx=bottom;

   int86(0x33,&in,&out);

   in.x.ax=1;

   int86(0x33,&in,&out);

    poly[0]=left;

    poly[1]=top;

    poly[2]=left+100;

    poly[3]=top;

    poly[4]=right;

    poly[5]=bottom;

    poly[6]=right-100;

    poly[7]=bottom;

    printf("BUTTON STATUS");

    while(!kbhit())

    {

      in.x.ax=3;

      int86(0x33,&in,&out);

      c=out.x.bx;

      gotoxy(2,2);

      switch(c)

      {

      case 0:

                 break;

      case 1:

                 in.x.ax=2;

                 int86(0x33,&in,&out);

                 setfillstyle(SOLID_FILL,15);

                 fillpoly(4,poly);

                 in.x.ax=1;

                 int86(0x33,&in,&out);

                 printf("\nLEFT  PRESS");

                 break;

      case 2:

                 in.x.ax=2;

                 int86(0x33,&in,&out);

                 setfillstyle(SOLID_FILL,0);

                 fillpoly(4,poly);

                 in.x.ax=1;

                 int86(0x33,&in,&out);

                 printf("\nRIGHT PRESS");

                 break;

      }

      gotoxy(2,4);

      printf("\nPress any key to exit");

    }

    in.x.ax=0;

    int86(0x33,&in,&out);

    getch();

    closegraph();

    return 0;

}

Hardware lab program for ascii and scan values of a key

This is a hardware lab program to obtain the scan code and ascii code of a key. If you have any doubts, please let me know.

DEVELOPMENT:

#include<stdio.h>

#include<conio.h>

#include<dos.h>

void main()

{

            int ac,sc;

            union REGS in,out;

            do

{

                        clrscr();

                        printf("Enter a key");

                        in.x.ax=0;

                        int86(0x16,&in,&out);

                        sc=out.h.ah;

                        ac=out.h.al;

                        printf("\nKey: %c",ac);

                        printf("\n Scan code is:%d",sc);

                        printf("\n Ascii code is :%d",ac);

                        printf("\nPress any key to continue and 'e' to exit!\n");

}while(getch()!='e');

 }

Hardware lab program for Mouse co-ordinates as well as status

This is a C program to implement mouse co-ordinates as well as status of button click in the hardware lab.

If you have any doubts, please let me know.

#include<stdio.h>

#include<conio.h>

#include<dos.h>

void main()

{

     int x,y , z,x1,y1,z1;

     union REGS in,out;

     in.x.ax=1;

     int86(0x33,&in,&out);

     in.x.ax=3;

     int86(0x33,&in,&out);

     x1=out.x.cx;

     y1=out.x.dx;

     z1=out.x.bx;

    do

    {

        do

        {

              in.x.ax=1;

              int86(0x33,&in,&out);

              in.x.ax=3;

              int86(0x33,&in,&out);

              x=out.x.cx;

              y=out.x.dx;

              z=out.x.bx;

        }while((x==x1)&&(y==y1)&&(z==z1));

            clrscr();

            printf("MOUSE COORDINATES:");

            printf("\nx coordinate:%d\t ",x1);

            printf("\ny coordinate:%d\t ",y1);

            printf("\n\nBUTTON STATUS");

            switch(z1)

            {

                 case 0: printf("\nNo press\n");

                        break;

                 case 1:printf("\nLeft press\n");

                        break;

                 case 2:printf("\nRight press\n");

                        break;

                 case 3:printf("\nBoth press\n");

                break;

         }

         x1=x;

         y1=y;

             z1=z;

             printf("\n\nPress any key to exit..");

     }while(!kbhit());

     in.x.ax=2;

     int86(0x33,&in,&out);

}