3dfx Archive - Rampage dongle

goriath

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Re: Rampage dongle
Reply #465 - 04.12.13 at 00:05:11

My answer, if anybody cares, is that would be easier for Dominik speak directly with the engineer so he can improve dongle performance and fix problems, rather than communicating through intermediaries that aren't addicted to the matter Roll Eyes

Would be better for him, for you and Oscar and anybody which Dominik is developing the dongle for.

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« Last Edit: 04.12.13 at 00:06:09 by goriath »

OLD SCHOOL: Because it was done right the first time

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trevormacro God Member Offline Voodoo5k6 Gold SE, Legend & Mystical Edition Posts: 622 Gender:	Re: Rampage dongle Reply #466 - 04.12.13 at 01:22:53 right, i will ask him.
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trevormacro God Member Offline Voodoo5k6 Gold SE, Legend & Mystical Edition Posts: 622 Gender:	Re: Rampage dongle Reply #467 - 04.12.13 at 08:42:44 Could you help to let me know the mosfet module number and resistor value of your rev A2 dongle please? All components please (for references and values).
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Loeschzwerg Senior Member Offline AAlchemy PSU maker :-) Posts: 396 Germany -> Bavaria -> Augsburg Gender:	Re: Rampage dongle Reply #468 - 09.12.13 at 12:56:48 @Gary and Oscar: Please change following resistors: R10/R11/R12 => 100 ohm R13/R14/R15 => 3.0k ohm You can also send me the dongle back so I can do it, I've got all values at home.
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osckhar

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Re: Rampage dongle
Reply #469 - 09.12.13 at 14:11:15

Loeschzwerg wrote on 09.12.13 at 12:56:48:

@Gary and Oscar:
Please change following resistors:
R10/R11/R12 => 100 ohm
R13/R14/R15 => 3.0k ohm

You can also send me the dongle back so I can do it, I've got all values at home.

Thanks Dominik for the info.

I will solder the new smd components and I keep you informed.

Regards,
Oscar.

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osckhar

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Re: Rampage dongle
Reply #470 - 11.12.13 at 09:34:16

@Dominik,

I did some test before to add new resistor values perhaps it can help to get the perfect inverter adapter.

ADDED 20/12/2013
VOLTAGE VALUES ARE NOT CORRECT

640X480 - FULL WHITE SCREEN

NOT DONGLE:
RED 0.397v
GREEN 0.399v
BLUE 0.404v

DONGLE
RED 0.638v
GREEN 0.637v
BLUE 0.637v

640X480 - FULL BLACK SCREEN

NOT DONGLE:
RED 1.373v
GREEN 1.379v
BLUE 1.395v

DONGLE
RED 0.013v
GREEN 0.013v
BLUE 0.013v

1280X1024 - FULL WHITE SCREEN

NOT DONGLE:
RED 0.393v
GREEN 0.395v
BLUE 0.400v

DONGLE
RED 0.634v
GREEN 0.632v
BLUE 0.632v

1280X1024 - FULL BLACK SCREEN

NOT DONGLE:
RED 1.387v
GREEN 1.393v
BLUE 1.409v

DONGLE
RED 0.005v
GREEN 0.005v
BLUE 0.005v

Perhaps I am wrong but values voltage with DONGLE in full white screen must be 0.7 and in full black screen 0V. What seems to be good is 3 line colors with dongle has same voltage.

Today wieh new resistor I will do same reference test.

Regards,
Oscar.

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« Last Edit: 20.12.13 at 12:18:58 by osckhar »

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Loeschzwerg Senior Member Offline AAlchemy PSU maker :-) Posts: 396 Germany -> Bavaria -> Augsburg Gender:	Re: Rampage dongle Reply #471 - 11.12.13 at 18:10:05 Thanks for the values 0.7v is the maximum when it comes to color intensity, a little lower just means the image won't be that bright. But ~70mV isn't that much to worry about.
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osckhar

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Re: Rampage dongle
Reply #472 - 12.12.13 at 09:54:34

Dominik,

Added the value resistors and the inverted got an amazing improvement in DOS MODE. I have feeling the letters are still with brightness point.

Now is possible to play games using Dongle in Windows.

Yessssssssssssss!!!!

What I noticied still is in desktop the icons has little of ghost, shadow.

Today if find time free I will take voltage values.

Thanks,
Oscar.

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Loeschzwerg Senior Member Offline AAlchemy PSU maker :-) Posts: 396 Germany -> Bavaria -> Augsburg Gender:	Re: Rampage dongle Reply #473 - 12.12.13 at 17:05:26 Perfect Please post some pictures if possible. I know this "ghosting" effect what you mean. We will see what I can get out of the new design combined with a different transistor set.
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osckhar

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Re: Rampage dongle
Reply #474 - 20.12.13 at 12:06:25

Yesterday I was checking voltage values dongle. I used a V4 agp for compare values in same test pattern. What I found is in black test pattern Dongle shows a high voltage value compared to V4-4500.

Not sure what you think guys, but If I unsolder the last resistor in output in 3 rails and add 3 pots trimmer until match the voltage uses the V4-4500 agp. Possibly this will not fix the SHIFTS, but colors brightness should be perfect.

Anyway, before to buy the 3 pot trimmer I can try the following:

The voltage value before last resitor is 0.56V (Not sure since I need to re-test it again), if I add a resistor 110 Ohm instead of 75 Ohm used. I will get a output voltage of 0.005V.

Why not try...

What do you think?

Regards,
Oscar.

ps. The post above I wrote dated 11/12/2013 values voltage are not corrected.

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Loeschzwerg

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Re: Rampage dongle
Reply #475 - 20.12.13 at 12:52:07

Don't change the 75 ohm resistors, they are needed for the correct VGA impedance.

On my very first attempts I had:
R10/R11/R12 => 100 ohm
R13/R14/R15 => 3.0k ohm

But I did too measure higher voltage on a black screen. That's why I went for:
R10/R11/R12 => 75 ohm
R13/R14/R15 => 2.7k ohm

The voltages now were ok, but we know the colors weren't that good Wink

So I went back for the first setting and those work quite well.

I will write a white and a black screen test for DOS (320x240) and send them to you. (beginning next week)

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« Last Edit: 20.12.13 at 12:55:27 by Loeschzwerg »

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osckhar God Member Offline www.3Dfx.es Posts: 812 SPAIN Gender:	Re: Rampage dongle Reply #476 - 20.12.13 at 13:22:39 Thanks for the info. - Oscar.
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trevormacro God Member Offline Voodoo5k6 Gold SE, Legend & Mystical Edition Posts: 622 Gender:	Re: Rampage dongle Reply #477 - 03.06.14 at 14:22:00 Hi, I was absent during a small time. Any news about new dongle version to have a better quality image on screen? Thanks
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Voodoo_Freak YaBB Newbies Offline Affordable Reality Posts: 44 Berlin/Germany Gender:	Re: Rampage dongle Reply #478 - 10.07.14 at 19:48:59 I am also interested if there is any progress. How about the dongle? Does it finally work?
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gdonovan YaBB Administrator Offline Infernal Collector Posts: 2361	Re: Rampage dongle Reply #479 - 26.07.14 at 14:07:12 Voodoo_Freak wrote on 10.07.14 at 19:48:59: I am also interested if there is any progress. How about the dongle? Does it finally work? Sorry been busy with work and getting ready for my wedding in September!
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