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From:	rick_pid AT yahoo DOT com
Newsgroups:	comp.os.msdos.djgpp
Subject:	cant change the port number of my parallel port
Date:	10 Feb 2006 10:15:13 -0800
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

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");
}
};

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