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Subject:	Q : DPMI 1.0 Function 0x508
Lines:	18
From:	batchex <thedark1NOthSPAM AT phreaker DOT net DOT invalid>
Newsgroups:	comp.os.msdos.djgpp
Message-ID:	<335f5dbc.512a16ab@usw-ex0105-036.remarq.com>
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Date:	Tue, 04 Apr 2000 13:02:13 -0700
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NNTP-Posting-Date:	Tue, 04 Apr 2000 12:57:27 PDT
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hi,

I read in the FAQ section 18.7 that it is possible to map a
physical memory range to a program's address space. The
restriction to this is the physical address and the address to
be mapped to must be page aligned. My question is :
a. How do we ensure the mapped to address is page aligned?
b. How do we ensure there is enough space to map the physical
memory range?
c. If the physical address is a memory mapped i/o, do we need to
lock the mapped address?
d. If using int 0x31 call, where the memory handle can be found?

Almost forgot, the function I'm talking about is DPMI 1.0
function 0x508 or __djgpp_map_physical_memory().

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