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GMA -> TV?


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Hi,

 

I'm considering replacing my current htpc which is athlon xp based (no SSE2 so cant run osx86) with an intel 915 or 945 mobo with GMA900 or 950, so i can run a Front Row based home theatre thingy.

 

Does anyone know if a GMA mobo with ADD2 card will output a signal suitable for conversion to composite or s-video? If it cant connect to the TV at all, its not worth doing.

 

i'm a little fuzzy, but i seem to recall there being different types of DVI - some which have an integrated composite signal and some which are pure digital... is this right? has ANYONE tried this?

 

bofors - you have an ADD2 setup... can you pretty please try hooking it to a tv? ;)

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Hi,

 

I'm considering replacing my current htpc which is athlon xp based (no SSE2 so cant run osx86) with an intel 915 or 945 mobo with GMA900 or 950, so i can run a Front Row based home theatre thingy.

 

Does anyone know if a GMA mobo with ADD2 card will output a signal suitable for conversion to composite or s-video? If it cant connect to the TV at all, its not worth doing.

 

i'm a little fuzzy, but i seem to recall there being different types of DVI - some which have an integrated composite signal and some which are pure digital... is this right? has ANYONE tried this?

 

bofors - you have an ADD2 setup... can you pretty please try hooking it to a tv? :)

 

Will ADD2 cards like this

http://www.prolink.com.tw/english/products...ADD2%20Card.htm

 

Specifically model PV-CH7021 Work? Or do the require special drivers.

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Does anyone know if a GMA mobo with ADD2 card will output a signal suitable for conversion to composite or s-video?

 

According to Intel this is part of the plan for ADD2: http://www.intel.com/support/graphics/inte...b/cs-013296.htm

 

But I do not think anyone has built those types of ADD2 cards (yet), or at least I have not seen anything than the DVI-D (pure digital) versions which are not suitable for the conversion to analog that you want.

 

However, you should be able to connect to your TV with a convertor for the motherboard's VGA port with no problem.

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s'ok i sourced one off ebay - an ECS 915-based board with GMA900, PCI-E and DDR400, bundled with a Celeron D. the sound and lan on the board are compatible out of the box, so its perfect for my project :)

 

will keep you guys posted about this project when the parts arrive.

 

here's the thread: http://forum.insanelymac.com/index.php?showtopic=24819

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  • 2 weeks later...

I ordered the ADD-7021-DVI-T from pro-link since it has s-video output and it arrived today. I plugged it in to my Pentium D box using the i945G chipset (onboard GMA950) and it works fine in Windows XP but I can't get osx86 to output any display to it.

 

I see this in the /var/log/system.log:

Aug 29 17:21:21 localhost kernel[0]: display: Not usable

 

I was thinking it wasn't detecting the add2 card but the above statement in the system log says that it might be...

 

Anyway, I checked the vendor & device id in XP and it shows:

 

for the onboard gma950:

ven: 8086

dev: 2772

 

for the add2 card:

ven: 8086

dev: 2776

 

I checked the AppleIntelIntegratedFramebuffer.kext/Info.plist:

...

<key>IOPCIMatch</key>

<string>0x00008086&0x0000ffff</string>

 

AppleIntelGMA950.kext/Contents/Info.plist:

...

<string>AppleIntelGMA950VADriver</string>

<key>IOGLBundleName</key>

<string>AppleIntelGMA950GLDriver</string>

<key>IOMatchCategory</key>

<string>IOAccelerator</string>

<key>IOPCIClassMatch</key>

<string>0x03000000&0xff000000</string>

<key>IOPCIMatch</key>

<string>0x00008086&0x0000ffff</string>

 

Thus, 0x00008086&0x0000ffff should be able to detect both the 2772 and 2776 devices.

 

Any ideas?

 

Thanks everyone.

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