Program to make initialization of DMA Mode Through C

# include

# include

# include

# include

# include



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<

	delay(100);

	ans=inp(0x3f5);  //pcn



	cout<

	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<<""<       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;



}

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