🚀 go-pugleaf

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.

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
> -----------------------------------------

-- 

   James Connell

Do not Fold, Spindle, or Mutilate.
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