From: sandmann AT clio DOT rice DOT edu (Charles Sandmann)
Message-Id: <9710141704.AA04866@clio.rice.edu>
Subject: cwsdpmi r4 beta
To: djgpp-workers AT delorie DOT com
Date: Tue, 14 Oct 1997 12:04:35 -0600 (CDT)
Content-Type: text
Precedence: bulk

I've put together a second beta, with a few additional features.  I've
pretty much run out of energy and time to mess with it, so this is 
pretty close to the r4 cut.  Should the default "extra paragraphs" be
increased somewhat?  Each additional 1Mb of "tiny allocation capability"
needs about 12 paragraphs (1Kb = 5.5Mb).

CWSDPMI r4 features:
 Map HMA for non-VCPI clients
 Fix 0x800 mapping for 0x1... addresses
 Check 0x800 mapping for invalid addresses
 Use XMS extensions to support >64Mb XMS memory (tested, works!)
 New license agreement 
 Dynamic allocation for physical and swapfile usage bitmaps.
    A new cwsparam field for max swap usage.  The user can decide how 
    much virtual memory to allow in exchange for 32 bytes of real memory 
    per Mb swap.  The base footprint drops by 8Kb and runtime footprint 
    increases between 0 and 16Kb, depending on the amount of swap you want
    and how much disk you have free.  Now limited to 256Mb virtual and
    256Mb physical for a total of 512Mb memory.
 Flag to disable pagetable allocation in UMBs (activated in cwsparam)
 Flag to pre-allocate memory at DPMI entry (activated in cwsparam)
 VDS development implementation in source distribution