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From: dirw <dirwdirw DOT tw AT yahoo DOT com DOT tw>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: How to access 0xFF800000 data ?
Date: Thu, 3 Sep 2009 07:01:32 -0700 (PDT)
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Dear Sir,

Thanks for your great help.
I already can read the 0xFF800000 data in the MS DOS 6.11 mode.
But I still have some question.

1. In the MS DOS 6.11 mode , I call __dpmi_physical_address_mapping
(&mi) , it will return *successfully*.
   But in the Windows XP DOS mode, I call
__dpmi_physical_address_mapping (&mi) , it will return *FAIL*.
   Could you please give me some suggestion about this issue ?
   Is it possible use *djgpp* to write a BIOS flash application for
windows XP DOS mode ?

2. In the MS DOS 6.11 mode, it need csdpmi5b.zip to provide the DPMI
server for djgpp DPMI funtion.
    In the Windows XP DOS mode, does it already have DPMI server ?

3. If I want to write Windows XP application to read/write 0xFF800000
data, may I use *djgpp" ?
   Or I must use Visual C++ and MASM to call DPMI to meet my request ?
   (MSFT memory access information : http://support.microsoft.com/kb/131426/en-us/)

BR,
dirw