outporb problem

[rick]

Greetings to all,
i am not sure this is the write group to post my question to. If it is
not i apologize. In the mean time if you have the answer to my question
please help. THANKS!!

i am trying to write a program using parallel port. I wrote this
program to change the port number to one or zero. I am not able to
change the port number from one to zero. It takes it sever run time to
change from one to zero. WHY? ANY SUGGESTIONS?

#include <conio.h>

#include <stdio.h>

#include <dos.h>

int main()

{

char ch, ch2;
while (getch() != 'E')

{

printf ("please enter z to write zero to the parallel port \n");

printf ("please enter o to write one to the parallel port \n");

ch = getch();

if (ch = = 'z')

{

outportb (0x3BC, 0x00);

printf ("writing 0 to the parallel port \n");

}

if (ch == 'o')
outportb (0x3BC, 0x0F);

printf ("writing one to the parallel port \n");

}

};

[Ben Pope]

rick wrote:

Greetings to all,
i am not sure this is the write group to post my question to.

Try reading the responses to the same question posed 3 days ago. The
answer hasn't changed.

http://groups.google.co.uk/group/com...efe75a728eba91

Ben Pope
--
I'm not just a number. To many, I'm known as a string...