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Title Program to write data in DMA Mode.
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Category C » Hardware Interaction Through C
Hits 368848
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# 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(0x3f5,0); //Cylinder no. delay(200); outp(0x3f5,0x08); //Sense Interrupt Command delay(200); ans=inp(0x3f5); //Reading ST0 in data register delay(100); ans=inp(0x3f5); //pcn cout<<endl<<hex<<ans; delay(200); outportb(0x12,0); /*initialization of DMA Mode*/ delay(200); outportb(0x11,10); /*supplying Mode Byte*/ int ar=FP_OFF(arr); int ar1=FP_SEG(arr); outportb(0x10,2); /*supplying channel no. on port 10*/ regs.h.ch = (ar1)&(0x0f00); regs.x.ax = regs.h.ah+ar; (regs.h.ch)++; outportb(0x04,regs.h.al); delay(200); outportb(0x04,regs.h.ah); delay(200); outportb(0x81,regs.h.ch); delay(200); outportb(0x05,1); // DMA End //READ command delay(200); outportb(0x3f5,46); //Command Code delay(200); outportb(0x3f5,0); //Command Code delay(200); outportb(0x3f5,0); //Cylinder no. delay(200); outportb(0x3f5,0); //Head Addr delay(200); outportb(0x3f5,3); //Record delay(200); outportb(0x3f5,2); //Sector size delay(200); outportb(0x3f5,5); //EOT delay(200); outportb(0x3f5,21); //GPL delay(200); outportb(0x3f5,10); //DTL //result delay(200); // st0 int st0 = inportb(0x3f5); printf(" st0 = %x",st0); if(inportb(0x3f5) & (192)!=0) { printf(" st0= %d",st0); cout<<" Abnormal termination st0"; delay(200); outp(0x3f2,0x0c); //Motor off exit(0); } delay(200); int st1 = inportb(0x3f5); printf(" st1 = %x",st1); if((st1=inportb(0x3f5)) !=0) { printf(" st1=%d ",st1); cout<<" Abnormal termination st1"; delay(200); outp(0x3f2,0x0c); //Motor off exit(0); } delay(200); int st2 = inportb(0x3f5); printf(" st2 = %x",st2); if((st2=inportb(0x3f5)) != 0) { cout<<"st2= "<<st2; cout<<" Abnormal termination st2"; delay(200); outp(0x3f2,0x0c); //Motor off exit(0); } cout<<" Successful Termination"; delay(200); cout<<" c= "<<inportb(0x3f5); delay(200); cout<<" h= "<<inportb(0x3f5); delay(200); cout<<" r= "<<inportb(0x3f5); delay(200); cout<<" n= "<<inportb(0x3f5); delay(200); outp(0x3f2,0x0c); //Motor off getch(); }

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