Date: Tue, 18 Mar 1997 01:15:57 -0500 From: "Louis A. Mamakos" <louie@TransSys.COM> To: Amancio Hasty <hasty@rah.star-gate.com> Cc: multimedia@FreeBSD.ORG Subject: Re: latest bt848 code Message-ID: <199703180615.BAA00471@whizzo.transsys.com> In-Reply-To: Your message of "Mon, 17 Mar 1997 21:43:43 PST." <199703180543.VAA07396@rah.star-gate.com> References: <199703180543.VAA07396@rah.star-gate.com>
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I've rebooted the system with the PCI bus latency timer set to 32, and it seems to be running pretty well so far. I also added a change to short-circuit the interrupt service routine in the driver when interrupts are masked, but that shouldn't affect anything when the bt848 board is open - only when it's not in use, and that's not been a problem. So, I guess the bus latency timer may be the cause of the problems I've had - I'll know more after it's been running for a while. FYI, I noticed that with the driver open and doing a continuous capture with fxtv, it's generating 120 interrupts per second. In the "tv in a window" case, where the user doesn't need to be notified, it would be nice not to suffer the interrupt overhead. I don't know if that's possible or not - I need to dig in deeper to understand how the driver fits together to see if that's reasonable. Foo, I missed seeing Letterman tonight fiddling around with this. Now that it seems to be working, that won't be a problem any more. Just tune in the show from a cron job :-) louie
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