OSDev.org

Mode: Real
OS: DOS
Comp: Borland C++ 5.02
Platform: DOS standard

EXE B Crashes if:

1. EXE A is set as TSR and loaded more then once. (this should not happen?)
2. EXE A is not a TSR,a and another program uses its (old) memory ( i understand this)

EXE A:
--------------------------------------------------------------------------------
#include <Iostream.h>
#include <Fstream.h>
#include <StdLib.h>
#include <DOS.h>

void huge (*HelloPtr)(void);
void Hello(void);

void main(void)
{
HelloPtr = &Hello;
(*HelloPtr)();

  system("if exist C:\\TempPtr.dat del C:\\TempPtr.dat ");
  ofstream Stream;
  Stream.open("C:\\TempPtr.dat");
  Stream<<HelloPtr;
  Stream.close();
// _dos_keep(0, (_SS + (_SP+32/16) - _psp)); //Makes it TSR
}

void huge Hello(void)
{
cout<<"Hello World";
}
EXE B (the one that is run to test this external function calling)
-------------------------------------------------------------------------------

void huge (*HelloPtr)(void);

void main(void)
{
  unsigned long Temp;
  system("codesh~1.exe");
  ifstream Stream;
  Stream.open("C:\\TempPtr.dat");
  Stream>>Temp;
  Stream.close();
  HelloPtr = (void huge(*)())Temp;
(*HelloPtr)();
  getch(); //Also it crashes if this line is removed?!#$% wtf
}

Notes:

I have tried far, and _loadds also, no to avail.
Help Please!
Thanks

VoidLogic