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Date:      Thu, 15 Mar 2001 11:10:17 +1100
From:      das@mbox.com.au
To:        freebsd-hardware@FreeBSD.ORG
Cc:        hackers@FreeBSD.ORG
Subject:   Parallel Programing in FreeBSD
Message-ID:  <3eb86b3f2779.3f27793eb86b@mbox.com.au>

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Hi,

i'm trying to do some programming on freebsd and i can't 
find 'asm/io.h'.  this must be for security reasons.

so how do i talk to the parallel port?

Thanks,

Dave Seddon


here's the really simple bit of code i'm trying to use:

   #include <stdio.h>
   #include <unistd.h> /* needed for ioperm() */
   #include <asm/io.h> /* for outb() and inb() */


   #define DATA 0x378
   #define STATUS DATA+1
   #define CONTROL DATA+2


   int main(void)
   {
   int x = 0x32;
   int y = 0x08;


   if (ioperm(DATA,3,1)) {
   	printf("Sorry, you were not able to gain access to the 
ports\n");
   	printf("You must be root to run this program\n");
   	exit(1);
   	}


   outb(DATA, x); /* Sends 0011 0010 to the Data Port */
   outb(CONTROL, y^0x0b);

   /* SELECT_IN = 1, INIT = 0, /AUTO_FEED = 0, /STROBE = 0 */

   return (0);


   }



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