From:	csantill AT lausd DOT k12 DOT ca DOT us
Message-ID:	<3420FC7E.209F@lausd.k12.ca.us>
Date:	Thu, 18 Sep 1997 03:04:49 -0700
MIME-Version:	1.0
To:	djgpp AT delorie DOT com
Subject:	Bad Mem return data

This is a multi-part message in MIME format.

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from: csantill AT lausd DOT k12 DOT ca DOT us

How come I can never get __dpmi_free_memory information or
_go32_dpmi_free_mem_info to return the correct mem installed
& mem free?  I'm always of a meg or two. The 2nd part if the
program is just HD space check which works correctly.

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#include <stdio.h>
#include <dos.h>
#include <dpmi.h>
#include <conio.h>

int main(void)
{

// Disk characteristics structure
  struct dfree ds;
// Mem characteristics structure
  __dpmi_free_mem_info info;

// Temp values of needed data
  unsigned long int free_s,tot_s,used_s,free_m,tot_m,used_m;

// Get disk characteristics
  getdfree(3,&ds);
// Get mem characteristics
  while(__dpmi_get_free_memory_information(&info)!=0);

// Calc disk info
  tot_s=ds.df_total*ds.df_sclus*ds.df_bsec;
  free_s=ds.df_avail*ds.df_sclus*ds.df_bsec;
  used_s=tot_s-free_s;
// Calc mem info
  free_m=info.total_number_of_free_pages*4096;
  tot_m=info.total_number_of_physical_pages*4096;
  used_m=tot_m-free_m;

// Print mem info
  printf("\n\n\n\n\n\n\n"
         "+-------------------------------------+\n"
         "| Physical RAM Stats on this computer |\n"
         "|                                     |\n"
         "| Total Bytes Installed: %U\n"
         "| Total KiloBytes Installed: %U\n"
         "| Total MegaBytes Installed: %U\n"
         "|                                     |\n"
         "| Bytes Used: %U\n"
         "| KiloBytes Used: %U\n"
         "| MegaBytes Used: %U\n"
         "|                                     |\n"
         "| Bytes Free: %U\n"
         "| KiloBytes Free: %U\n"
         "| MegaBytes Free: %U\n"
         "+-------------------------------------+\n\n\n\n\n\n",
         tot_m,
         tot_m/1024,
         (tot_m/1024)/1024,
         used_m,
         used_m/1024,
         (used_m/1024)/1024,
         free_m,
         free_m/1024,
         (free_m/1024)/1024);

  getch();

// Print disk info
  printf("\n\n\n\n\n----------------------------------\n"
         "Disk Space Stats on drive C:\n\n"
         "Total Clusters: %U\n"
         "Sectors per Cluster: %U\n"
         "Bytes per Sector: %U\n\n"
         "Available Clusters: %U\n\n"
         "Total Bytes: %U\n"
         "Total KiloBytes: %U\n"
         "Total MegaBytes: %U\n\n"
         "Free Bytes: %U\n"
         "Free KiloBytes: %U\n"
         "Free MegaBytes: %U\n\n"
         "Used Bytes: %U\n"
         "Used KiloBytes: %U\n"
         "Used MegaBytes: %U\n"
         "----------------------------------\n\n\n",
         ds.df_total,
         ds.df_sclus,
         ds.df_bsec,
         ds.df_avail,
         tot_s,
         tot_s/1024,
         (tot_s/1024)/1024,
         free_s,
         free_s/1024,
         (free_s/1024)/1024,
         used_s,
         used_s/1024,
         (used_s/1024)/1024);

  getch();

  return 0;

}

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