Date: Mon, 15 Jan 1996 14:39:44 -0500 (EST) From: Sujal Patel <smpatel@wam.umd.edu> To: Scott Whittle <scott@patton.com> Cc: hackers@freebsd.org Subject: Re: Request examples of using outb() in inb()in program. Message-ID: <Pine.BSF.3.91.960115143559.2940B-100000@sl-001.sl.cybercomm.net> In-Reply-To: <199601151554.KAA23095@emma.patton.com>
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On Mon, 15 Jan 1996, Scott Whittle wrote: > I recently saw a thread on I/O at the port level using outb() and inb(). > Would someone post (or email) some source showing the use of each. > > I wrote a small program, which complied fine, but when I ran it (as root) > it puked big time. I'm not into the frustration thing, so I figure I'd ask > those who know. :) You need to open /dev/io before you access the ports (O_RDONLY is rnough to read and write any port). You can also use the KDENABIO ioctl on /dev/console (probably the preferred way, but /dev/io is easier :) Sujal
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