Edge blending with PC ?

Basically it could be made out of dimes, then the experiments would tell how good that is.
In edge blending the picture splitting (with overlap) that is the big thing, the fading is really simple.

Well, hello again.

First: Mosaic is part of the NVidia driver. Mosaic is available in the NVidia control panel if the driver detects a Quadro (or Tesla) card, 
but will be disabled if the driver detects a Geforce card. 

I found some time over the past few days to go on with my setup.
Last weeks state (like all these months before):
- Nvidia GTX480 BIOS- modded to Quadro 6000
- Nvidia driver , 320 something, did uninstall and clean it after adding the EDID
- mosaic partially working
- no edid-signal from the projectors
- custom resolution added with nvidia control panel (1056*800*60)

Recent changes:
- i harvested two identical EEPROMs from an old DDR RAM- module and copied the information
that was on my Samsung TFT monitors EEPROM. Just read out via Powerstrip and flashed it onto the EEPROMs using a programmer
from a friend of mine.
- Soldered the EEPROMs to my Marquees DVI cables and reflashed them with a custom EDID- file i created using both AW EDID editor and CRU.
- Powerstrip 3.85 full version is necessary to flash the chip, other versions will ask for a special key you can get from the manufacturer.


"standard" timings from my post above means that i let nvidia control panel set the porches. I used the "automatic settings" for my 1056*800 resolution

This time i calculated the necessary porches using the Marquee's spec sheet by VDC vdcds.com/pdf/datasheets/8110-8500-9500.pdf
- Used 0.5 to 1V video signal level instead of standard 0.3 to 0.7 (or similar).

Windows 7 and Nvidia control panel don't make problems anymore about resolution changes after reboot of the pc and so on.
I can set both projectors together as a large display using mosaic in nv control panel. Windows does recognize it as a display with 2112*800 pixels,
which is fine. Using the Marquee remotes *- Button i get the same plausible values (48,xx kHz and 60Hz) on both projectors, which also is great.

The only thing that my setup lacks at this point is that Mosaic only allows me to do "frame correction", but not "overlap".
Overlap would be necessary to blend the ... well ... what i would want to be the blend zone.

Newer drivers:
- i tried the newest, version 377.61 does not offer Mosaic at all in the control panel,
- the next older one 376.33 does have a Mosaic option, but doesn't apply my settings.

I do have my modded GTX480-->Quadro 6000 BIOS at hand. If someone would agree to check it for errors
i made when compiling the file, i would be very thankful.
The other in my view possible explanation for the mosaic problem is that(especially newer driver versions)
check the RAM size of the card. Quadro cards always have more video memory, 6GB in case of the Quadro 6000, whereas my GTX 480 of course still has 1,5GB.

What do you think about this?
Regards, Julian

The problem with the Matrox DualHead2go is: there are two versions: Analogue with 1x VGA in and 2 VGA out,
max resolution 2560x1024 at 60Hz. Isn't enough for my setup which is 1056x800x60 at the moment, at least 1056x800x120 in the future,
hopefully about 2x1408x1440x60 for 2D and 2x1056x800x120 for 3D.
The digital version of the DualHead2Go is of no use for me as i have CRT projectors with analogue inputs.

I recently saw that Nvidia offers "Surround" on most GTX cards as well, but you'll need to have two in SLI mode or a dual gpu card (like GTX590 or 690).
But since the non Quadro cards don't offer mosaic support, i don't think any driver based blending will be available.
The strangest thing of them all is that i only found Surround-setup descriptions for three monitors/ projectors, but not a single one with two.

Regards, Julian