with DOS/4GW? - Open Watcom

DOS Programming Guide
/*
MEMWIN.C - This example shows how to get information
about free memory with DPMI call 0x0500 using Windows
as a DPMI host. Note that only the first field of the
structure is guaranteed to contain a valid value; any
field that is not returned by the DPMI implementation
is set to -1 (0FFFFFFFFh).
Compile & Link: wcl386 /l=win386 /zw memwin
Bind: wbind -n memwin
*/
#include
#include
#include
#include
struct meminfo {
unsigned LargestBlockAvail;
unsigned MaxUnlockedPage;
unsigned LargestLockablePage;
unsigned LinAddrSpace;
unsigned NumFreePagesAvail;
unsigned NumPhysicalPagesFree;
unsigned TotalPhysicalPages;
unsigned FreeLinAddrSpace;
unsigned SizeOfPageFile;
unsigned Reserved[3];
} MemInfo;
#define DPMI INT 0x31
void main()
{
union REGS regs;
struct SREGS sregs;
DWORD mi 16;
regs.w.ax = 0x0500;
mi 16 = AllocAlias16( &MemInfo );
sregs.es = HIWORD( mi 16 );
regs.x.di = LOWORD( mi 16 );
26 How do I get information about free memory in the 32-bit environment?