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Old 08-13-03, 08:16 PM   #1
marcello
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Post nvidia - geforce3 ti200 - TV

Hi,

I have been trying to get my GF3 ti200 to connected to a projection TV using the full screen on the TV. This card uses the Philips TV encoder.

Basically, this PC will not have the any monitor attached to it. Just the TV. The TV-out (s-video) is already working fine. The screen resolution is set to 800x600.

The TV is a 4:3 set. The X console fits fine on the left/right/botton of the screen, but not on the top.

There is a 1" black bar on the top that I can not get rid of.

I tried using the nv driver with nvtv, but the only mode that is acceptable is the huge mode on 800x600. The only problem there is that now it cuts portion of the screen....

In summary, Did anyone ever managed to get a decent full screen diplay on a TV set using the nvidia driver?

Does anyone have any ideas?

Thanks.
Marcello
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Old 08-14-03, 03:28 AM   #2
pe1chl
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It seems like NVIDIA have decided that on a TV you should not use the entire screen area, but leave some black borders around the picture.

Why this is done is entirely beyond me, as this problem does not occur on VGA screens with the same card. On VGA it is a matter of loading the correct values into the several programmable divider registers, which is what you do using the "modeline" and its 8 last parameters.

Then why can't this work with TV?

As my TV has RGB-in I am sometimes tempted to just run a VGA-to-SCART cable to the TV and setup a modeline that generates TV compatible frequencies. Should be easy.
Then you go around the apparently crappy TV-OUT circuitry.
Unfortunately there is only one VGA out on my card. Maybe it is a solution for you.
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Old 08-14-03, 11:28 AM   #3
marcello
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Thanks.

I was checking the Averkey Imicro as a solution to convert VGA-TO-TV .

Does anyone have a good experience using it?
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Old 08-14-03, 01:47 PM   #4
pe1chl
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This seems like a complicated solution.

In theory, all you need is a XOR gate to combine HSYNC and VSYNC into a single signal sent to CVBS on the SCART, and some circuit to put voltage on the two enable signals to select RGB.

Check this: http://www.syncblaster.com/
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