Hi!

I wasted my last two days und had build a small 3dfx-screensaver, showing a rotating 3Dfx-logo in a white world.
The saver is based on a engine written by me and should support opengl & direct3d. The opengl-core has not been finished jet and is still a bit buggy. unfortunately i was not able to get the opengl-core running on voodoo-cards, so please tell me if you were able to get it running on a voodoo-system.
the default-render-core is Direct3D.
Other feautures:
-stencil shadows
-mip-mapping
-bilinear filtering
-play music in the background
-fog

to change the render-device, you need to replace the "3ddrv.dll" by one of those in the folder "3dfx_scr".

Here's the link to my homepage with a screenshot, the full source-code and the executable:
http://www.icefire-editions.de/html/index.php?html=inc/main/projekte/project.php&loader=3dfx%20Screensaver

If you have problems or suggestions, please let my know!

have fun,
IceFire

hi guys!

since some time i'm trying to build an AGP 4x/8x to AGP 2x adapter.

by replacing the power supply lanes on an agp riser card, i was able to plug a voodoo3 in an i845 chipset based system.

sry, pic removed through traffic problems..
this is how the adapter looks like:
sry, pic removed through traffic problems..

i've tested the adapter on some modern agp 4x/8x boards... here my results:

K7S8X:
-no post screen
-pci graphics card: device (v3) is recognized in windows, but when tying to install the drivers, i get a blue screen (page fault in unpaged area...)

i845 chipset based SIEMENS oem board:
-no post screen
-with a pci graphics card, i was able to install the drivers of a v3 (a v5 has not been recognized), but when trying to intizialise the v3 as a secondary card, the system freezes...on next boot it shows in the device manager: "could not launch device (code 10)".

i875p chipset based board:
-no post screen
-pci card freeze in BIOS (on v3 and v5)


well, hank had posted some years ago:

"Hi,

So far a bit of news on AGP 4X slot support. I did some looking arround, and found AGP wear extenders. This might make the AGP 4X slot possible for most people. I was going to cut a new key in the existing V5 AGP connector, but internal PCB planes extend into the area. If you cut into the PCB you will expose power planes and can cause a short.

I'll see if I can get an extender with 4X key cut on one side and universal socket mounted on the other. Most of the cases can support the aded height on the V5, but the bracket will have to be modified. VGA connector is low enough on V5, there would be no problem in connecting monitor to the shifted V5. The cost of the extender from 3rd party is about $50 US from what I have found so far.

Next VREF to VSA100 must be modified and a couple of straps. I have to check on AGPCLK, INT and RESET if the pins are still 3.3V on AGP 4X.
"

through this post and some intel pdfs i know that i have to replace the agp VREF signal (pin 66, side a & b).

so i did.
i assume that the VREF signal is dependent of the delivered voltage to the graphics card, so i connected the VREF-pins on the riser card with a matrox G400 (AGP 4x), isolated the pins there, plugged it in a dummy system (Agp universal, on witch the matrox should run at 3,3V due the A3 & A2 pins are not connected) and started both system at once.

it didn't work, but on the 1000x try the led of my monitor switched on , stayed 3 seconds on und switched off again.


well, hope that you where able to understand all that I've wroted there even through my english is the worst..

now, my problem is:

how can i simulate an agp VREF signal on a v5 so that the mainbaord will deliver 3,3V on the signal lines?

PS:

hank once said:
"Hi Guys,

VSA 100 is capable of supporting 1.5V signalling required for AGP4X slot. The IO voltage ring on the chip is isolated from 3.3V supply. There is voltage refference on V5 that will support 1.5V, but it is disabled through a pin called Sense. The mechanical problem of plugging V5 into AGP4x/8x slot can be gotten arround by using a riser. The MB will not burn since the IO voltage is isolated (AGP VDDQ Plane).

You will be limmited to PCI 66 speed, there will not be DMA! You can afford to send more virtex info and do texture paging upto the bandwidth limit of pci 66.

Hail to the king.....Baby (I think this one is better from Ash :-P)"

well, as far as i know, the agp bus delivers the signal amplitute that will deliver most compatibility when no vref signal is received - a agp 4/8x bus will send 1,5V and the voodoo, witch wants 3,3V is not able to understand anything.
but, hank said that the v5 support a voltage reference that would make it possible to have the v5 run at 1,5V. it would be helpful if i would know witch pin is meaned with "sense"

thanks, guys!
IceFire

the thread in the german voodooalert forum:
http://forum.voodooalert.de/thread.php?threadid=12413&threadview=0&hilight=&hilightuser=0&page=1