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To: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
cc: msmith@atrad.adelaide.edu.au, terry@lambert.org, mestery@winternet.com,
        freebsd-multimedia@FreeBSD.ORG, current@FreeBSD.ORG
Subject: Re: Problem with my Wincast, fxtv 
In-reply-to: Your message of "Mon, 18 Aug 1997 04:41:33 +0200."
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Date: Sun, 17 Aug 1997 21:05:12 -0700
From: Amancio Hasty <hasty@rah.star-gate.com>
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Please, post proposed changes to the multimedia mailing first so at 
the very least the multimedia group can present a unified consesus
agreement .


	Thank You,
	Amancio

>From The Desk Of Luigi Rizzo :
> > >Ah, the light dawns.  How about the next isa_dma* function Luigi has
> > >requested?  Is the sanity checking in general a major problem from your
> > >point of view?
> > 
> > My right eye begings to nervously twitch ... Just joking .
> > 
> > I have no idea what Luigi wants to do next in the way of dma interface
> > so  him and I will  have to "sit" down and iron out the functionality . 
> > I will let Luigi post the outcome of our discussion . 
> 
> There is not much to discuss, basically I have proposed a new
> function, isa_dmastop(chan), which allows me to stop a DMA transfer.
> This _might_ be needed to implement functions such as PAUSE in a
> clean way (not sure the function is really necessary, since one
> can ni principle disable the DMA engine on the sound card and then
> do things as if the transfer had finished. But since I am not sure
> that all sound cards support disabling the DMA engine before a
> transfer is complete, I prefer to have an alternative way as well.
> 
> The code bloat is minimum and the reason why I want it to be in isa.c
> rather than in the sound driver is precisely what Steve Passe said,
> avoid subsystem fiddle with the hardware in uncontrolled ways.
> 
> 	Cheers
> 	Luigi