Date: Fri, 1 Aug 1997 05:14:26 +1000 From: David Hogan <dhog@lore.plan9.cs.su.oz.au> To: multimedia@freebsd.org Subject: Bt848 question Message-ID: <199708010514.148197.out.bakij@plan9.cs.su.oz.au>
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Hi there! I saw your page on the Bt848 driver for FreeBSD. I am trying to write my own Bt848 support for the Plan 9 OS, and I've run into a problem caused by a deficiency in the documentation, and was wondering if you guys might know the answer, since you've worked with the card also. I'm trying to use the 8-bit dithered RGB mode, but I have no idea what pallette the chip uses. The PDF file from Brooktree is completely silent on this. Presumably it's some kind of colour cube, but there are a lot of possible ways of representing one. Do you know what it is? I suppose I could try asking Brooktree, but I thought I'd ask here first, since I've had better experiences talking to people who aren't companies... You might be interested to know that the card which I have is a Miro PC TV, which your page says is not yet supported. I'm still looking for technical information about the GPIO connections and the tuner module; the tuner appears to be similar to the Phillips Fl1236, but not identical -- at least, the control bits for the PLL (for selecting which range it is) don't match the specs I downloaded from Phillips. I was also unable to find anything on the card which looked like an audio demodulator, so unless they are doing this with discrete components, it must be integrated with the tuner. If I find out more, I'll let you know so that you can update your page...
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