Re: [Freedos-user] DPMI with 4 GB

2005-04-15 Thread Bernd Blaauw
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 --

Re: [Freedos-user] DPMI with 4 GB

2005-04-15 Thread Michael Devore
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

[Freedos-user] DPMI with 4 GB

2005-04-15 Thread Roberto Waldteufel
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 mode. No such real mode high memory manager is n