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[patch6]

Would a voltage attenuator like the following be fine for reducing the voltage that results in the extreme white tint / white clipping that Punmaster's LMH6739 circuit is supposed to fix?

(IMG:http://img81.imageshack.us/img81/222/videoweakenernw1.png)

[yaywoop]

hmm. interesting.
the only thing about voltage dividers is that they change under load. as long as the load is always 75 ohms, it should work. you might want to check that your screen does actually have a 75ohm termination, or account for any difference by changing resistor b.
to me it looks like its worth a try. someone correct me if  we are missing something...

for things like this it would be handy to have an oscilloscope

[FrostyTheSnowman]

Alright, just for the fun of it I just ordered 5 samples of the LMH1980 sync-seperators from smoke_screen_uk's post, and all the parts necessary to attenuate the signal with patch6's diagram... i'm willing to bet that this will produce a perfect VGA cable.

I'll get back to you guys in a week or so when the parts arrive.

[patch6]

Here are a couple of test patterns to determine video quality (probably through XBMC's picture viewer). White clipping causes the grey grid in this picture to disappear:
(IMG:http://img222.imageshack.us/img222/4122/0253background9ra1.gif)
It also causes the grey bar on the left of this image to turn bright white:
(IMG:http://img222.imageshack.us/img222/2792/clipboard03vz4.png)
And finally, the grey scale on the bottom of this picture loses 4 shades of grey to it:
(IMG:http://img222.imageshack.us/img222/6030/coreltstcardlw0.jpg)

I wonder if hooking a second monitor up to the output with a Y-splitter will weaken the voltage enough to remove the clipping.

Going to try an attenuator with a transfer function of .458, requiring a 66 ohm resistor and two 200 ohm ones for each channel (not 100% exact, +-2 ohms off), before trying that. An .8755 one didn't make a noticable difference, and neither did a .6-ish one (lost the calculations, but it was something like 33 ohms to 330).

[w0g]

Any news frosty?

[FrostyTheSnowman]

I'm honestly not sure what is going to happen with the commercial version of this cable. I'm really not even sure there is enough demand for it to sell...

It's strictly a non-profit thing for me, so i'm not sure how the marketing/production side is really going...

For now though, if anyone out there wants a custom hand-made one, just let me know. (hand made ones are obviously not non-profit though)

NOTE: This is a new cable design, which includes a 1+3/2+3 mode toggle switch. (for Linux/Games)

Here's a picture of my current design: (sorry about the quality, it's a camera phone)

(IMG:http://i114.photobucket.com/albums/n243/sk8er83329/vga_cable_with_mode_switch.jpg)




NOTE: I will only be building these cables by hand for people for a short period of time. (because they really are a pain in the ass to build)

First come, first serve.

This post has been edited by FrostyTheSnowman: Nov 25 2007, 10:20 AM

[bobbyblaze]

Hi Frosty!
Lead looks sweet and I'd like to get one but any chance of co-ax digital out for audio (pleeeeeeeeeease (IMG:style_emoticons/default/smile.gif) )?

[Foe-hammer]

I do believe there still is a niche market for the vga cable.  I'd buy one, even though i already have one that i made, just to have another one.

[RayTwoOneThree]

Hello i was wondering if someone out would be willing to make a cable for me or sell one in they have a extra one. I would be very thankful if you did. U can just pm me with your info and a photo of the cable. And we got a deal. Thanks...

[redpacman]

QUOTE(FrostyTheSnowman @ Sep 1 2007, 02:31 PM)

How does this look?  

This is what the manufacturer said the packaging would look like.

Oh yeah, and they also said it would be easy to implement, and shouldn't raise the price.

I will know for sure in about 2 days from this point...

...hi frosty!
hats off to your devotion!
xbox will be 100% with the perfection of vga support
...i'm from china, and desperately looking for such a vga cable!
...i have been trying to contact you through pm, but no luck...
...maybe it's that we are too far away from each other so you won't make me one
can you please tell me how to contact your cables' manufacturer? is it in GuangDong province or in other regions?
maybe they could send me a sample and i could help test it too!
...and i definitely will buy one with the final design! so you have got at least one foreign customer already
ps: there's a forum of xbox fans here in China, i cannot post the url but
people there are discussing about your realses too!
i'm sure some of them will want a ready-made xbox 1 vga cable too.
maybe when your cable is done designing, i can write a test report on your cable and see what people there thinks.
pps: should you sell them in China, and need any advise on chinese version of user's guide book, i'd be very happy to help, no fees
thanks again and please keep us posted on the new progesses!

[FrostyTheSnowman]

The 'Frozen Cable' is officially out and available for sale through Divneo!

http://www.divineo.c...v-us/zz-xb-fcbl

NOTE: Neither myself nor Xman954 are profiting from these cables in any way. I do endorse them as being compatible with our BIOS, but we are not personally profiting from any sales.

[FrostyTheSnowman]

Have you tried it on another monitor?

This cable has varying results with different monitors, the ones that are usually 100% 480p/720p/1080i compatible are the Sony Trinitrons, Viewsonics (any model), and Acers.

LCDs can also be a little picky, but most are at least 480p/720p compatible.

If your current monitor does not work or has a green tint at certain resolutions chances are that it's not fixable due to hardware limitations on the original XBOX.

Try another monitor, i'm sure your cable and BIOS are working properly, your monitor probably just doesn't like 720p or 1080i.

[tirlibibi]

Same prob, works fine on a PC Monitor, but i tried on 3 differents TV, there is a sync prob at the top of the screen (around 1/4).

[FrostyTheSnowman]

Overall, Focus machines work great, but Conexant machines seem to be the most compatible with most monitors.

Try your Conexant machine.

[FrostyTheSnowman]

Also, i've been informed that you can also find them at the following websites too:

http://www.thegametr...able-p-572.html

http://www.consolesh...o...ebase&bid=3

NOTE: Neither myself nor Xman954 are affiliated with either of these websites, we are just being helpful.