The Bt829 (and newer Bt835) are side-port video decoders. That is,
they send decoded video to the video controller via the 'bytestream'
protocol into the VIP (video input port). These are similar to the SAA7114
in that they are not PCI bus masters. The SAA7114 (from Philips)
uses ITU656 (CCIR656) protocol timing codes to send decoded
video data to the VIP.
The Bt848/Bt878, which are PCI bus masters, can DMA decoded
video data to system memory and are not dependent on a particular
video controller to do the DMA.
So, to program the Bt829, you would have to also program the video
controller. As Dusty mentioned, the GATOS project for the ATI cards
is one such implementation.
Hope it helps...
-- Peter
-----Original Message-----
From: Dusty deBoer <ddeboer@xxxxxxxxxxxxx>
To: video4linux-list@xxxxxxxxxx <video4linux-list@xxxxxxxxxx>
Date: Sunday, August 27, 2000 3:40 PM
Subject: Re: [V4L] Bt829BKRF Video In Chip
>This may not help any - but I think the ATI All-In-Wonder Pro uses the
bt829
>chip. And some folks (http://www.core.binghamton.edu/~insomnia/gatos/ or
>http://lost.data.ee/v4l/ or search for "GATOS") have written some drivers
and
>stuff to work with ATI cards. I don't know what all you need to do with it,
or
>even if the ATI stuff comes close to what you need, but I use the GATOS
display
>software all the time to display my VCR output, through the ATI card, onto
my
>RedHat screen.
>
>Hope this helps.
>
>-Dusty deBoer
>
>----- Original Message -----
>From: James Hughes <sudraka@xxxxxxxxxxxxx>
>To: <video4linux-list@xxxxxxxxxx>
>Sent: Sunday, August 27, 2000 12:56 AM
>Subject: [V4L] Bt829BKRF Video In Chip
>
>
>> I have a Sager 8500 laptop which has a video in port driven by a
bt829
>chip. This chip is manufactured by the same company that makes the bt848
chip
>which is supported by bttv. Does anyone know is there is a driver for the
bt829?
>If not does anyone know any of the hardware specifications of this chip?
This is
>my last hurdle in getting rid of windoz so any help at all would be greatly
>appreciated.
>>
>> Thanks
>> James Hughes
>>
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