In a message dated 99-12-27 00:07:48 EST, you write:

<<
 (The memory wall of 640 K is quite a different affair. I don't know
 why nobody tries to get *this* wall down; those DOS-expanders and
 DPMIs are work-arounds, not really next steps beyond the first
 primitive DOS.)
  >>
Sorry, Heimo, unlike the Berlin Wall, this one will never come down.
Closest jackhammers are programs like Qemm's memory manager
which sets itself up between the CPU and Memory acting like an
octopus traffic cop, 386 Max and the like. These scavenge unused
blocks of memory like the monochrome video, etc. which add to the
pile of memory available from the 640K left unassigned or reserved
by the forefathers for devices and options heretofore abandoned.

The dangers are the inherently unstable  addresses reclaimed by
these programs, which do not prove compatible with the programmers'
selected choices causing freezes, hangs and other assorted oddities
when called to use as usable addresses freed by said managers.

Reason why DOS itself is a limited OP Sys, designed solely for the
purpose of accessing drives and files and maintaining a heirarchy of
said files.

There should be an XDOS (extended DOS) that taps into ANY
available memory on-board, which searches for modular memory
pluggable onto the motherboards such as in the slot where the
Math Coprocessor snaps, or on-board chip-cradles, etc. or added
as a daughter board onto any older motherboard for 286, 386 which
carries an Xtended Bios which searches and programs unused
memory for use with XDOS.

A pipe dream.
Soulement

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