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From: John Hay <jhay@mikom.csir.co.za>
Message-Id: <199603270718.JAA25315@zibbi.mikom.csir.co.za>
Subject: Re: read/write to hardware ports from user code
To: zeek@primenet.com (John Reynolds)
Date: Wed, 27 Mar 1996 09:18:33 +0200 (SAT)
Cc: questions@freebsd.org
In-Reply-To: <199603270612.XAA01998@localhost.primenet.com> from "John Reynolds" at Mar 26, 96 11:12:47 pm
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> 
> 
> 
> Subject says it all. I have a program that works with a "homemade" PC
> I/O card and would like to get it to run under FreeBSD as well. I've gotten
> it to run under MS-DOG, OS/2, and Linux thus far and I know this kind of
> thing had to have already been done by somebody in FreeBSD land.
> 
> I'm looking for the equivalent of the "ioperm" system call (under Linux)
> which gives programs permission to write to a range of address and the
> routines "inb" and "outb" which read and write a byte to a given hardware
> port. All the searches under the FreeBSD Web page, man pages, and include
> files have come up with nil. :(
> 
Just open "/dev/io" in read/write mode. (You have to have the right
permissions for that.)

John
-- 
John Hay -- John.Hay@csir.co.za