There is such a thing as I/O mapping, which decreases the amount of
usable RAM. Usually the memory is mapped to just below 4GB.
AGP GART is there for example (256MB usually), as well as other things
(PCI for example).
Thus, you usually see 3.3 up to 3.5GB of RAM.
Bernd
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At 01:11 PM 4/15/2005 +0100, Roberto Waldteufel wrote:
Hi All,
No I am not using Himem.Sys or Himem.exe. I am writing for 32-bit
protected mode, so I need DPMI for the flat memory model, which in theory
should enable the use of all 4 GB of RAM on my system, not just extra high
memory in the real