Bristol Digest, Vol 559, Issue 3

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Today's Topics:

1. Re: WinTV HVR-1100 (was 2 TV cards - can they work
together!?) (Amias Channer)
2. Re: WinTV HVR-1100 (was 2 TV cards - can they work
together!?) (Alex Butcher)


----------------------------------------------------------------------

Message: 1
Date: Wed, 16 Jul 2014 09:47:13 +0100
From: Amias Channer <me@amias.net>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] WinTV HVR-1100 (was 2 TV cards - can they work
together!?)
Message-ID:
<CAMgU7XV9eLqT0ejXBdXXfaSNewMkPtEwn=cSFKR+R2au2gqpbw@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

> Yup, but Peter's card is a hybrid Analogue/DVB-T model.

all the pci analog tv cards i've ever seen and owned used that direct
memory write method.

early hauppage cards mostly.

Cheers
Amias


On 14 July 2014 16:44, Alex Butcher <lug@assursys.co.uk> wrote:

> On Mon, 14 Jul 2014, Amias Channer wrote:
>
>
>> On 14 July 2014 10:50, Alex Butcher <lug@assursys.co.uk> wrote:
>> I vaguely remember that, in the mid-90s, some TV cards required
>> an internal
>> IDC ribbon cable to link to the VGA card. I've never needed
>> that, however.
>>
>>
>> pretty sure that was phased out before dvb cards came around
>>
>
> Yup, but Peter's card is a hybrid Analogue/DVB-T model. Obviously, even if
> that is the purpose of that connector it would only be used for analogue,
> as
> DVB-T decoding requires the host CPU (or some kind of outboard MPEG
> decoder,
> anyway).
>
>
> most tv cards i've used just write directly into video memory (dma?)
>>
>
> Yup, PCI bus master DMA.
>
>
> with varying amounts of success , especially when compiz is used.
>>
>> Cheers
>> Amias
>>
>
> Best Regards,
> Alex
> _______________________________________________
> Bristol mailing list
> Bristol@mailman.lug.org.uk
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Message: 2
Date: Wed, 16 Jul 2014 11:10:48 +0100 (BST)
From: Alex Butcher <lug@assursys.co.uk>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] WinTV HVR-1100 (was 2 TV cards - can they work
together!?)
Message-ID: <alpine.LFD.2.03.1407161056010.5987@nffheflf.pb.hx>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed

On Wed, 16 Jul 2014, Amias Channer wrote:

> > Yup, but Peter's card is a hybrid Analogue/DVB-T model.
>
> all the pci analog tv cards i've ever seen and owned used that direct memory
> write method.
>
> early hauppage cards mostly.

Yup, same here. I don't think I've even seen a card that outputs via a
header. But my first VGA card (maybe even my second) - a Diamond Stealth 64
with an S3 Vision864 chipset - had a "VESA Advanced Feature Connector"
header for non-PCI direct transfers. I figured this might have been one of
the rare matching partners that /could/ use the VESA AFC, even if PCI
BM DMA was the normal and recommended approach. Would be odd for a tuner
card so new, I'll grant you, but stranger things have happened in commodity
hardware...

Googling it up, I see that the VESA AFC header was 2x13 pins, so I'll go
with my original guess that it's some kind of factory programming/diagnostic
header on Peter's card.

It looks as though the main uses of the VESA AFC were Creative's 3DO
Blaster, MPEG decoder cards, TV tuner/video capture cards and first gen 3D
accelerators.

> Cheers
> Amias

Best Regards,
Alex



------------------------------

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End of Bristol Digest, Vol 559, Issue 3
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