Date:	Tue, 20 Aug 1996 13:27:55 +0200 (MET DST)
From:	Mark Habersack <grendel AT ananke DOT amu DOT edu DOT pl>
Reply-To:	grendel AT ananke DOT amu DOT edu DOT pl
To:	Ian Stevenson <ians AT vvl DOT co DOT uk>
cc:	djgpp AT delorie DOT com
Subject:	Re: DJGPP Port access
In-Reply-To:	<3099.9608191516@vvl.co.uk>
Message-ID:	<Pine.NEB.3.95.960820132410.14378C-100000@ananke.amu.edu.pl>
MIME-Version:	1.0

On Mon, 19 Aug 1996, Ian Stevenson wrote:

>
>If I use DJGPP to compile a command line program for MS-DOS, which includes
>accesses to ports (i.e. _inp, _outp or their equivalents) will this program
>run correctly on the WindowsNT command line? 
>
>If so, would it still work if compiled for NT (using RSXNT is that the name?)
Probably yes. When running with CWSDPMI, djgpp programs have IOPL set to 3
which means that all the I/O is not simulated. Under WinNT however, I suspect
that the DPMI server will emulate your in, out etc. instructions produced by
_inp, _outp .... functions. Anyway, the code should work as expected.
OTOH, I think it depends on what hardware you're accessing and on what level.
There are, undoubtedly, areas that are being kept closed for the "ordinary"
application programs under WinXX.

Greetings, Mark

/************************************************************/
/** Maybe it was infatuation or the thrill of a chase?   **/          
/** Maybe you were always beyond my reach and my heart **/
/**   was playing safe?                     ***********/ 
/** But was that love in your eyes I saw, **/
/**   or the reflection of mine?        **/
/** I'll never really know for sure,  **/
/** You never really gave me time!  **/
/** Won't you give me that time?  **/ 
/**          "Cindirella Search" **/
/********************************/
Visit my homepage: http://ananke.amu.edu.pl/~grendel

- Raw text -