C Programming Code Examples

C > Hardware Interaction Through C Code Examples

Program to Implement Seek Command



Program to Implement Seek Command

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

void main()
{
	clrscr();
	union REGS regs;
	int ans;
	char arr[1000];

	outp(0x3f2,0x1c);   //Motor On
	delay(200);
	outp(0x3f5,0x0f);  //Command Code
	delay(200);
	outp(0x3f5,0x00);  //Command Code
	delay(200);
	outp(0x3f5,0x0b);  //Cylinder no.
	delay(200);
	outp(0x3f5,0x08); //Sense Interrupt Command
	delay(200);

	ans=inp(0x3f5);  //Reading ST0 in data register
       //	cout<<endl<<hex<<ans;

	delay(100);
	ans=inp(0x3f5);  //pcn

	cout<<endl<<hex<<ans;

	outportb(0x12,0);           /*initialization of DMA Mode*/
	outportb(0x11,10);         /*supplying Mode Byte*/
	clrscr();
	int ar=FP_OFF(arr);
	int ar1=FP_SEG(arr);

       printf(" %x",ar1);

       regs.h.ch = (ar1)&(0x0f00);
       printf(" %x",(regs.h.ch));
       regs.x.ax = regs.h.ah+ar;
       (regs.h.ch)++;
       printf(" %x",regs.x.ax);
       int z = (regs.x.ax) & (0x0f00);
       cout<<"
"<<z;
       getch();
       outportb(0x04,regs.h.al);
       outportb(0x04,regs.h.ah);
       outportb(0x81,regs.h.ch);
       outportb(0x05,1);
       // dma end

       outp(0x3f2,0x0c);   //Motor off
       return;

}