Set disk transfer area address

From , 2 Years ago, written in C, viewed 203 times.

#include <process.h> 
#include <string.h> 
#include <stdio.h> 
#include <dos.h> 
 
int main(void) 
{ 
   char line[80], far *save_dta; 
   char buffer[256] = "SETDTA test!"; 
   struct fcb blk; 
   int result; 
 
   /* get new file name from user */ 
   printf("Enter a file name to create:"); 
   gets(line); 
 
   /* parse the new file name to the dta */ 
   parsfnm(line, &blk, 1); 
   printf("%d %s\n", blk.fcb_drive, blk.fcb_name); 
 
   /* request DOS services to create file */ 
   if (bdosptr(0x16, &blk, 0) == -1) 
   { 
      perror("Error creating file"); 
      exit(1); 
   } 
 
   /* save old dta and set new dta */ 
   save_dta = getdta(); 
   setdta(buffer); 
 
   /* write new records */ 
   blk.fcb_recsize = 256; 
   blk.fcb_random = 0L; 
   result = randbwr(&blk, 1); 
   printf("result = %d\n", result); 
 
   if (!result) 
      printf("Write OK\n"); 
   else 
   { 
      perror("Disk error"); 
      exit(1); 
   } 
 
   /* request DOS services to close the file */ 
   if (bdosptr(0x10, &blk, 0) == -1) 
   { 
      perror("Error closing file"); 
      exit(1); 
   } 
 
   /* reset the old dta */ 
   setdta(save_dta); 
   return 0; 
}

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#include <process.h> 
#include <string.h> 
#include <stdio.h> 
#include <dos.h>

int main(void) 
{ 
   char line[80], far *save_dta; 
   char buffer[256] = "SETDTA test!"; 
   struct fcb blk; 
   int result;

/* get new file name from user */ 
   printf("Enter a file name to create:"); 
   gets(line);

/* parse the new file name to the dta */ 
   parsfnm(line, &blk, 1); 
   printf("%d %s\n", blk.fcb_drive, blk.fcb_name);

/* request DOS services to create file */ 
   if (bdosptr(0x16, &blk, 0) == -1) 
   { 
      perror("Error creating file"); 
      exit(1); 
   }

/* save old dta and set new dta */ 
   save_dta = getdta(); 
   setdta(buffer);

/* write new records */ 
   blk.fcb_recsize = 256; 
   blk.fcb_random = 0L; 
   result = randbwr(&blk, 1); 
   printf("result = %d\n", result);

if (!result) 
      printf("Write OK\n"); 
   else 
   { 
      perror("Disk error"); 
      exit(1); 
   }

/* request DOS services to close the file */ 
   if (bdosptr(0x10, &blk, 0) == -1) 
   { 
      perror("Error closing file"); 
      exit(1); 
   }

/* reset the old dta */ 
   setdta(save_dta); 
   return 0; 
}

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Set disk transfer area address

Reply to "Set disk transfer area address"