From:	"Michael N. Filippov" <michael AT idisys DOT iae DOT nsk DOT su>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Announce: CWSDPMI r5 public beta
Date:	24 Oct 2000 15:51:42 GMT
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Charles Sandmann <sandmann AT clio DOT rice DOT edu> wrote:
>> Why not just add parameter "reserved DOS memory", then if (for example)
>> 240 of 640 is taken by DOS/TSRs and "reserved DOS memory" == 100 KB
>> CWSDPMI would allow to work with 250-300 MB instead of this hardcoded 128.
>> It would be a more flexible variant for nested programs too.

> There is already such a parameter which is defined when using DOS memory as
> DPMI memory.  It's currently set for about 64Kb.  Eventually I may just 
> support that value with pagetables, too.  But for now I want to make minimum
> changes and get it released.

VALLOC.C 
{
...
#define SAVEPARA CWSpar.savepar /* If we use DOS memory for paging, amt to save */
...
static int alloc_pagetables(int mintable, int wanttable) 
{
...
  geninterrupt(0x21);   /* lol == size of largest free memory block */
...  
  if (lol > wanttable*PAGE2PARA) {      /* 8 will probably result in 5 user pt */
    if (mem_avail > MINAPPMEM)                  /* 256K extended */
      lol = wanttable*PAGE2PARA;
    else {
      if (lol > wanttable*PAGE2PARA+SAVEPARA)
        lol -= SAVEPARA;                        /* Reserve extra DOS memory */
      mem_avail += (lol >> 8) - wanttable;
    }
  }
...
}
...
} 

So you say it will be supported for pagetable

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