🚀 go-pugleaf

On Sun, 27 Dec 1998 19:12:25 -0800, James Connell <mikeyyou@suck.ass> wrote:

> actually DOS has nothing to do with it! the Intel prossor has an in and
> an out instruction to write a byte or word (also strings) to one of 64K
> IO ports pointed to by the DX register ( or by an 'Immediate' operand
> for the first 256). while not opsys dependant it is system dependant.
> check the documentation of the compiler you're useing for the functions
> inp(),inpw(),outp(),outpw() or some such. if you can't find any of these
> than look up the section on 'mixed lanuage' programming because you're
> going to need to write them yourself in assembler.
> the function are easy to do if you pay attention to the memory model
> used for the [bp] fetches.
> 

<Jack>

Using [bp] for fetches will quite possibly give terribly wrong results in a
Win32 program, and assembler or not it will cause NT to shut down the program
instantly.

Exactly what did you think was wrong with Lawrence Kirby's assertion that the
C language provides no way to do this?  The recommendation for
comp.os.msdos.programmer is actually quite appropriate.  Other appropriate
groups would be compiler specific support groups, like
news:borland.public.cpp.language or news:microsoft.public.vc.language.

But any newsgroup which discusses standard C is not the proper place.

</Jack>

> Lawrence Kirby wrote:
> > 
> > In article <914778641.26356.0.nnrp-12.c2dea518@news.demon.co.uk>
> >            sar@sar-home.demon.co.uk "Spencer Anthony Robinson" writes:
> > 
> > >Please could somebody help me I am trying to find out how to use C to read
> > >and write to the ports of a PC though DOS. Any examples would be appreciated
> > 
> > The C language itself provides no way to do this. You'll need to use
> > DOS related extensions so ask in a newsgroup such as
> > comp.os.msdos.programmer. Incidentally why did you cross-post this
> > to non-English language newsgroups?
> > 
> > --
> > -----------------------------------------
> > Lawrence Kirby | fred@genesis.demon.co.uk
> > Wilts, England | 70734.126@compuserve.com
> > -----------------------------------------