Написание программы тестирования НГМД тестом "бабочка" с записью – чтением со сравнением

Практика №5

Задание: написать программу тестирования НГМД тестом «бабочка» с записью – чтением со сравнением.

Текст программы:

#include <stdio.h>

#include <dos.h>

#include <stdlib.h>

unsigned char headNum = 0;

unsigned char sectNum = 0;

unsigned char trckNum = 0;

unsigned char buffer_const[512]={0};

unsigned char buffer_const_cmp[512]={0};

unsigned char buffer_sector[512]={0};

void read_the_sector(unsigned char h, unsigned char c, unsigned char s, unsigned char sector_for_read[512]) {

 int segm = FP_SEG(sector_for_read);

 int offs = FP_OFF(sector_for_read);

 unsigned char res = 0;

 asm {

  mov ah, 02h

  mov al, 01h

  mov dl, 00h

  mov dh, h

  mov cl, s

  mov ch, c

  mov es, segm

  mov bx, offs

  int 13h

  pushf

  pop ax

  and ax, 1

  mov res, al

 }

 if (res) {

  printf("R: H (%d), C (%d), S (%d): ERROR\n", h, c, s);

 }

}

void write_the_sector(unsigned char h, unsigned char c, unsigned char s, unsigned char sector_for_write[512]) {

 int segm = FP_SEG(sector_for_write);

 int offs = FP_OFF(sector_for_write);

 unsigned char res = 0;

 asm {

  mov ah, 03h

  mov al, 01h

  mov dl, 00h

  mov dh, h

  mov cl, s

  mov ch, c

  mov es, segm

  mov bx, offs

  int 13h

  pushf

  pop ax

  and ax, 1

  mov res, al

 }

 if (res) {

  printf("W: H (%d), C (%d), S (%d): ERROR\n", h, c, s);

 }

}

void check_sector(unsigned char h, unsigned char c, unsigned char s) {

 read_the_sector(h, c, s, buffer_sector);

 write_the_sector(h, c, s, buffer_const);

 read_the_sector(h, c, s, buffer_const_cmp);

 write_the_sector(h, c, s, buffer_sector);

 for (int i = 0;  i < 512; i++) {

  if (buffer_const[i] != buffer_const_cmp[i]) {

   printf("X: H (%d), C (%d), S (%d): ERROR\n", h, c, s);

   break;

  }

 }

}

int main(void) {

 // check for ready

 asm {

  mov ah, 10h

  mov dl, 00h

  int 13h

 // get number of heads, cylynders per head and sectors per cylinder

  mov ah, 08h

  mov dl, 00h

  int 13h

  inc dh

  inc ch

  mov headNum, dh

  mov sectNum, cl

  mov trckNum, ch

 }

 printf("Headers             : %d\n", headNum);

 printf("Cylinders per head  : %d\n", trckNum);

 printf("Sectors per cylinder: %d\n", sectNum);

 // filling constants buffer

 for (int i = 0; i < 512; i++) {

  buffer_const[i] = rand()%255;

 }

 struct  time t, start, end;

 int start_time, end_time;

 gettime(&start);

 start_time = start.ti_sec + start.ti_min*60;

 for (int head = 0; head < headNum; head++) {

  for (int cyl = trckNum/2; cyl >= 0; cyl--) {

   int cylTmp = trckNum/2 + cyl;

   if (cylTmp != 80) {

    for (int sec = sectNum/2; sec >= 0; sec--) {

     if ((sectNum/2) + sec != 18)

      check_sector(head, cylTmp, (sectNum/2) + sec + 1);

     check_sector(head, cylTmp, (sectNum/2) - sec + 1);

    }

   }

   cylTmp = trckNum/2 - cyl;

   for (int sec = sectNum/2; sec >= 0; sec--) {

    if ((sectNum/2) + sec != 18)

     check_sector(head, cylTmp, (sectNum/2) + sec + 1);

    check_sector(head, cylTmp, (sectNum/2) - sec + 1);

   }

  }

 }

 gettime(&end);

 end_time = end.ti_sec + end.ti_min*60;

 printf("Total Time is: %d s\n", end_time - start_time);

 return 0;

}