Date: Mon, 22 Jun 1998 08:37:05 -0500 From: David Kelly <dkelly@nebula.tbe.com> To: multimedia@FreeBSD.ORG Subject: Re: [Q] Multiple Bt848 cards in a PC. Message-ID: <199806221337.IAA15019@PeeCee.tbe.com> In-Reply-To: Your message of "Mon, 22 Jun 1998 21:05:25 %2B0900." <199806221205.VAA16466@enterprise.sfc.wide.ad.jp.>
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Tadashi Okoshi writes: > Does anyone have the PC with multiple(2,3, or 4...) Bt848 Cards? Along that same line of thought, how about multiple sound cards? Looking at /usr/src/sys/i386/isa/sound/pcm86.c doesn't suggest the driver is structured for more than one card per system. Additionally this appears to drive a nail in the multi-card coffin for pcm: /* PC-9801-86 specific constants */ #define PCM86_IOBASE 0xa460 /* PCM I/O ports */ Possibly there are other cards which might support more than one per system? /dev/MAKEDEV is structured correctly for multiple sound cards. The idea being tossed around at work is to link sites with up to 8 conference sessions using vat but rather than place up to 40 vat systems (one per user) at a site we'd like just one system per site with all 8 sessions statically started, connected to an analog switch matrix allowing the users to select their desired conference as needed. If i can't get multiple sound channels out of one box, then I'll need up to 8 boxes. The other head scratcher: can left and right channels of a sound card (input and output) be treated independently? See where I'm going? One vat conference on the left channel, another on the right, cut the sound card count in half. Another alternative would involve a number of really small diskless, no monitor, no keyboard, "embedded" FreeBSD boxes, one per user. Needs sound card and ethernet. Customized vat. Probably read the user's "channel" switch thru a parallel printer port. I like this solution best but there is a space problem and an analog audio distribution network already exists. -- David Kelly N4HHE, dkelly@nebula.tbe.com ======================================================================== Whom computers would destroy, they must first drive mad. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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