Hi all,
Johnson Lam escreveu:
Where can I find an explanation about overlap. What is it? I could not
understad from the docs what is overlapping with what.
The XDMA document have detail information. In short, overlap means
XDMA will buffer all output and return to the user's program. If it's
At 10:28 PM 7/1/2005 +0200, Eric Auer wrote:
Which can for example mean
EMM386 of FreeDOS has slow VDS. But it can also mean something completely
different.
And has to mean something completely different.
EMM386 doesn't support VDS double-buffering, and reports that when
queried. There is
Hello Eric,
part of the problem. AND Jack, I think the 47 seconds were FREEDOS HIMEM
version 3.10, not MS HIMEM.
interesting 'I think'
WTF is measured ?
Talking about every trick in the BOOK, the XMS 3.0 specs explicitly
tell that you do NOT have to LOCK XMS handles to use the XMS copy
Hello Alain,
That is why I wish that I could move ONLY the buffers to low memory, but
as was said here today, this seems too complicated as it is part of the
kernel internals
BUFFERS= are accessed (and used) only for single sector transfers.
and memcpy()'ing them around is MUCH faster then
...
either it's a bug - or it's not
if it's a bug, I (speaking generally) might even find it worth fixing
...
tom
This whole discussion is both interesting and amusing (as are many
discussions here...:- )
If you guys do find the cause of the slowdown, and it is fixable, and it
is a
Hi Johnson...
Thanks to Jack Ellis, he did help me to test HIMEM 3.10 and FDXMS
0.94. Even under MS-DOS the memory manager DO affect hard disk speed...
I ran 4 tests unzipping my 2.2-GB zeros file onto my C:...
A) FDXMS, no XDMA overlap: 54.0 seconds.
C) HIMEM, no XDMA
Eric Auer escreveu:
Hi Johnson...
Thanks to Jack Ellis, he did help me to test HIMEM 3.10 and FDXMS
0.94. Even under MS-DOS the memory manager DO affect hard disk speed...
I ran 4 tests unzipping my 2.2-GB zeros file onto my C:...
A) FDXMS, no XDMA overlap: 54.0 seconds.
C) HIMEM,
On Thu, 30 Jun 2005 21:57:33 -0300, you wrote:
Hi Alain,
Where can I find an explanation about overlap. What is it? I could not
understad from the docs what is overlapping with what.
The XDMA document have detail information. In short, overlap means
XDMA will buffer all output and return to
