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DPMI.DOC
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1993-01-10
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2KB
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66 lines
What is DPMI?
-------------
DPMI stands for "Dos Protected Mode Interface". It is a relatively new
industry standard for executing in protected mode. Normally DOS runs in
real mode.
What is protected mode?
-----------------------
Protected mode is a feature of the 0286 and later processors. It allows
a program to use virtual addresses instead of real addresses.
So What?
--------
Two things are of interest for this program in DPMI mode. One is that
we can now break the 640K limit on DOS fairly transparently. The other
is that the overlay kludge can be ripped out and a real overlay system
substituted.
Bottom Line
-----------
If you have a 80286 or later (386, 486, etc) you can run in DPMI mode.
I recommend that your machine have a minimum of 2M.
Other Programs
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DPMI is available under both Windows (in enhanced mode) and OS/2 V2
as a standard feature.
You can also run in DPMI mode under DV. There is a DPMI server that is
on many BBS called QDPMI that can be used or you can just use the one
that I have included.
Running the DPMI version of AA4RE
---------------------------------
1. Load any TSRs you need (eg: BPQCODE, MBBIOS, TNCTSR-S)
2. Execute BBDPMI instead of BB
You must have RTM.EXE in the same directory with BBDPMI.EXE. If you are
not running Windows, OS/2, or QDPMI then you must also have DPMI16BI.OVL
in that directory.
One change
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The editor that I use in the normal DOS mode will not run in protected
mode. I have substituted a new editor. Commands should be the same,
only the "look" of the editor is changed.
Problems?
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Read the DPMIUSER.DOC file on how to check out your computer's DPMI
hardwrae and software.