X-Authentication-Warning:	delorie.com: mail set sender to djgpp-bounces using -f
Date:	Tue, 18 Apr 2006 22:49:06 -0400
Message-Id:	<200604190249.k3J2n60s013817@envy.delorie.com>
From:	DJ Delorie <dj AT delorie DOT com>
To:	djgpp AT delorie DOT com
In-reply-to:	<A8adnbpWz9FuPdjZnZ2dnUVZ_sednZ2d@comcast.com> (message from Eric
	on Tue, 18 Apr 2006 19:31:15 -0700)
Subject:	Re: dos buffer
References:	<A8adnbpWz9FuPdjZnZ2dnUVZ_sednZ2d AT comcast DOT com>
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	djgpp AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

> I looked at __dpmi_allocate_dos_memory but it gets you a selector
> and I dont know what to do to convert that to a pointer

You do exactly what you do with the tb - either use farptr/nearptr, or
dosmemput/dosmemget.

DOS memory is *not* part of your regular memory, you can't just
"convert" such selectors to pointers.  You have to go through the same
tricks to switch from the virtual memory your program uses to the
physical memory DOS uses, both for the transfer buffer and for any
other DOS memory you allocate (low memory, high memory, or XMS
memory).

- Raw text -