[linux-dvb] DVB-T card for PCI-X

Christoph Anton Mitterer cam at mathematica.scientia.net
Fri Sep 30 23:12:12 CEST 2005


Ruediger Dohmhardt wrote:

> Christoph Anton Mitterer wrote:
>
>> Ruediger Dohmhardt wrote:
>>
>>> To answer your question: You can plug (2) and (3) into a PCI-X slot.
>>> Disadvantage: The whole PCI-X bus slows down to 33MHz, whenever it 
>>> recognizes a single PCI-card.
>>
>>
>>
>> Oh,.. thats bad,.. uhm is this sure? As I told my board hast 3 PCI-X 
>> slots (2 with 100MHz and 1 with 133MHz) and one conventional PCI slot 
>> (33MHz). I think the PCI and the PCI-X buses have each their own 
>> controller.
>
> I'm not really sure, how many busses you have. I guess 3:
> 1 x PCI-33MHz
> 1 x PCI-X 100MHz
> 1 x PCI-X 133MHz
> But again its just a guess.
> I assume further that just one bus (the one you plug your card into) 
> slows down to 33MHz.

Yes you're right. Jon remembered me just before that there are two OCI-X 
buses in my board (I forgot that *g*),...



>> Is there a way to defenitely determine if a card is keyed correctly?
>
> No!
> There are, for example, PCI-chips from companies like AMCC or PLX.
> You can easily find the data sheet in the WEB, which tells you what 
> kind of signalling they have.
> Most PCI-interface chips are ASICS, hence you won't find a 
> specification and you must rely
> (which you should do, except you design/build professional systems) on 
> the "keying".


> Hauppauge (in Germany) is always very helpful on the phone. They might 
> tell you what kind of signalling there PCI-chips use.

Yes,.. I'm already thinking about Hauppauge... Robert told me that 
Hauppauge announced an Dual DVB-T card, too. (for PCI) But I don't know 
yet if its compatible with my PCI-X, and what about those features like 
surround sound videotext, etc. (see other emails from me). Gavin said  
these aren't supported at all by those budget cards :-(

cam.
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