Hello Michael,Arkady, and everybody else
WITHOUT PROGRAMMING OR TESTING !!
some thoughts:
being pressed by arkady, I rethought the issue.
I think, that even IF EMM385 returns A000, the old kernels
will not merge a000 UMB into lower RAM.
old kernel, old a001 EMM386:
10000 - 9ffff available to programs
9ffff - a0000 possibly used as UMB link, but not available
a0000 - a000f hidden by emm386 'change a000 to a001'
a0010 - affff available UMB
...
old kernel, NEW a000 EMM386:
10000 - 9ffff available to programs
9ffff - a0000 possibly used as UMB link, but not available
a0000 - affff available UMB
...
AFAICS, the 9ffff - a0000 range is used as UMB link, but in itself
never available.
the problems I saw are
enable_UMB()
dos_alloc() returns 8000-afff
disable_UMB()
however dos_alloc() returning 8000-afff should never be happen,
as the UMB link area is used.
arkady turbo kernel, NEW a000 EMM386:
10000 - affff available to programs
if the a000-afff area is indeed merged into lower memory and
UMB area starts at Cxxxx, this might even work.
however I still would prefer arkady to recompile emm386
and tell us if that works, instead of using mental input bandwidth of
all people subscribed to this list.
Finally, an idea that might even be used:
I found that using EMM386 /IA000-Afff is dangerous.
But the Numega SofyIce people had the idea to write a program
LOADBIG MyProgram MyArguments
that would
merge A000-Afff into low memory
run MyProgram MyArguments
unmerge A000-Afff from low memory
so I could run a very normal system; but on request (for make/compile
jobs mostly) I could enjoy 64/96 K more memory.
tom
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