Date: Sat, 4 Apr 2020 22:04:53 +0100 From: Steve O'Hara-Smith <steve@sohara.org> To: freebsd-questions@freebsd.org Cc: Polytropon <freebsd@edvax.de> Subject: Re: Direct control of parallel port data lines Message-ID: <20200404220453.7bf2d61465ca1880acd34e45@sohara.org> In-Reply-To: <20200404204727.cd2a4042.freebsd@edvax.de> References: <20200404204727.cd2a4042.freebsd@edvax.de>
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On Sat, 4 Apr 2020 20:47:27 +0200 Polytropon <freebsd@edvax.de> wrote: > For an "external relay control unit", I need to activate > certain lines of the parallel port. I wish to address > the 8 output lines of the port. How is this done on > FreeBSD? <snip> > If possible, I want to use C for this task. I checked > "man ppc" and "man ppi", but I don't find their content > convincing, probably not what I'm looking for. > > What am I _actually_ looking for? ppi is exactly what you are looking for, but it will be strange given where you're coming from. There is a huge difference between a protected mode multi-tasking OS like FreeBSD and a real mode program loader like DOS when it gets to this kind of thing. -- Steve O'Hara-Smith <steve@sohara.org>
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