🚀 go-pugleaf

Borland's VROOMM overlay system will use the disk, expanded, or extended
memory to swap CODE only.  It will NOT swap data.  That's an entirely
different beastie.

VROOMM will automagically detect what sort of memory is available, and
swap to that accordingly.  I think it checks for expanded first, then
extended, and then if neither is found, it will use the disk (swapping
out of the executable, not a temp file!).

Moral of the story: If you want to use expanded or extended memory for
data, you have to write your own routines to deal with swapping the
various pages, etc.  Microsoft will send you the specs and a driver
for the XMS method of allocating and accessing extended memory,
including using the normally inaccessible 64K area way up at
the top of memory at no charge; just call their 800 # and ask for
it.  (aka HIMEM.SYS)

There are a number of commercial and shareware packages to do expanded
and extended memory management, but I've never really done more than
glance over them (I tend to roll my own routines).

Good luck.

-dg-

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