Date: Thu, 31 May 2001 23:40:32 -0700 (PDT) From: Chuck Rouillard <chuckr@opus.sandiegoca.ncr.com> To: Kyle Rollin <klined@orbimus.dhs.org> Cc: "David L. Hays, Jr." <elfkinz@elfland.net>, <freebsd-questions@FreeBSD.ORG> Subject: Re: Problem with sound card and lpt port on non-standard IRQs Message-ID: <Pine.BSF.4.31.0105312323030.44120-100000@opus.sandiegoca.ncr.com> In-Reply-To: <Pine.BSF.4.33.0106010157550.37565-100000@orbimus.dhs.org>
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On Fri, 1 Jun 2001, Kyle Rollin wrote: > <snip> > > > > ----- > > > Kernel Config file: > > > # Parallel port > > > device ppc0 at isa? port? irq 5 drq 3 > > > device ppbus # Parallel port bus (required) > > > device lpt # Printer > > > > Why do you have a DMA request value for a parallel port device? > > </snip> > > Most modern LPT ports (ECP, EPP, etc) require a DMA address. This is for > bi-directional communication with the printer, so the printer can directly > access the spooled pages in memory, etc. Fair enough. I haven't done any parallel port work, but I thought these to be PIO devices. Nevertheless, I don't see any explicit DMA support for the ppc device, at least in 4.3-STABLE (which is all I happen to have here at the moment). > > -Kyle Rollin > klined@orbimus.dhs.org .cr To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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