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From:	"Rod Pemberton" <do_not_have AT nohavenot DOT cmm>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: D. Borca's old ELF fork: mirror needed, DPMI cross-referencing
Date:	Mon, 14 Dec 2009 21:00:39 -0500
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"DJ Delorie" <dj AT delorie DOT com> wrote in message
news:200912142351 DOT nBENpwZf002663 AT delorie DOT com...
>
> That's an impressive list.  How many of those implemented DPMI 1.0 ?
> (not that it matters any more, sadly)
>

I didn't cross-reference _all_ of them - just _many_ of them.  It seems
"many" to me is about 50%.  I cross-referenced 16 that are DPMI hosts, 2
that aren't DPMI hosts (e.g., Pharlap 386|DOS extender, Novell DPMS), 2 that
use DPMI but aren't DPMI hosts (e.g., DJGPP, OpenWatcom compilers), 2 that
are the DPMI spec's.  I didn't bother to cross reference the other 16.  FYI,
most of those 16 are near the bottom of the list.  I couldn't locate copies
of some of the older ones, especially Pharlap and Qualitas.  I deemed many
of these as too obscure, specialized, incomplete, non-DPMI, undocumented, or
non-English.  There are probably far more out there.  There had to be some
hosts that went with many C compilers of the early 90's.  E.g., what hosts
did Borland, Zortech, etc. use?

Of the 16 DPMI hosts that I looked at, the hosts which support DPMI 1.0
functions varies by DPMI function...  The most complete is DPMIONE.  But,
it's missing a couple, like 0C00, 0C01.  DOS4G, DPMIONE, and HDPMI
(Japheth's HX) are most commonly listed on the 1.0 functions.  DOSBOX and
CWSDPMI are listed on a few too.  For 0801, I have ten hosts listed:
Causeway, DOS/32A, DOS4G, DOS4G/W, DOSBOX, DPMIONE, HDPMI, PMODEDJ, PMODEW,
WDOSX.  It looks like five of those are associated with either DJGPP or
OpenWatcom or etc. C compilers.  Overall 1.0 support, I'd say, is minimal.
0.9 support is far more complete.  I haven't compared them for 0.9
completeness.  But, a quick glance shows some 0.9 functions aren't widely
implemented either: 0B00, 0B01, 0B02, 0B03, etc.


Rod Pemberton

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