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Re: Voodoo 2 4444SX

Posted on 2024-02-17, 16:33

in Marvin \ Video
Fixed the TMU issue: https://www.youtube.com/watch?v=WFN9KXECng8 20240217_183140.jpg It's alive!!! Now I need to add the missing FBI, re-enable SLI and implement support for other resolutions/refresh rates. But first I'll play some Quake II on it :) Edit: the framerate drops as I enable wireframe in …

Re: Voodoo 2 4444SX

Posted on 2024-02-17, 16:03

in Marvin \ Video
A few days ago I probed all the FBI RGB out pins, to see any of them are stuck, as that would explain the green tint. All signals showed transitions, so the FBI should have been OK. Before adding the memory buffers, I managed to get Xilinx's ILA (integrated logic analyzer) working. This can be …

Re: Voodoo 2 4444SX

Posted on 2024-02-17, 10:39

in Marvin \ Video
I ported the changes to the 4444SX, now the FPGA generates the video clock that the FBI requests, feeds it into the FBI, then it takes the video clock output from the FBI and feeds it into the MMCM to generate required internal clocks for HDMI and for sampling the RGB bus. S1.jpg Still messed up. …

Re: Voodoo 2 4444SX

Posted on 2024-02-17, 08:12

in Marvin \ Video
Time for an update. Some good news and some bad news. I am now able to get a properly alligned image out of the V2 4444SX, however the colors are still wrong: Screenshot 2024-02-16 235752.png And sometimes this happens: S2.png Also, master FBI now has 1 dead pin, as well as the FPGA. I had to solder …

Re: Voodoo 2 4444SX

Posted on 2024-02-13, 20:52

in Marvin \ Video
I found some SN74LVC1G17 schmitt triggers, bodged them in and buffered the memory clock for the two TMUs and FBI, and the FBI vdeo clock. The application would still hang and there was no activity on any FBI/TMU RAM bus. After that I disabled in the registry both TMUs, and the application wouldn't …

Re: Voodoo 2 4444SX

Posted on 2024-02-13, 14:57

in Marvin \ Video
I resumed working on this a couple of days ago. First, a clarification of my previous post where I described the RAMDAC initialization sequence. At some point the FBI reads various PLL registers for clock that are never initialized or used. It does this to detect the RAMDAC model installed on the V2 …

Re: Quantum3D Obsidian2 X-24 repair

Posted on 2024-02-07, 17:05

in Marvin \ Video
Soldering the new TMU was a bit of a pain, but doable: Filename S10.jpg File size 1.48 MiB Views 296 views Filename S11.jpg File size 1.49 MiB Views 296 views There was also a broken 10R resistor array, and after fixing that the card runs nicely in SLI.

Re: Quantum3D Obsidian2 X-24 repair

Posted on 2024-02-07, 16:56

in Marvin \ Video
S4.jpeg S5.jpeg S6.jpeg Next I checked if the vias were still connected to the corresponding TMU1 and FBI pins, as well as GND and VCC. Most of them were salvageable. The pads were really corroded even underneath, and when touched by the soldering iron, they would instantly lift. So, wire and …

Quantum3D Obsidian2 X-24 repair

Posted on 2024-02-07, 16:51

in Marvin \ Video
The card worked fine without the daughterboard installed, or with a know good daughterboard. At a first look, it didn't look that bad, there were a few scratches but no broken traces. S1A.jpg However, the right TMU, TMU0, showed signs of corrosion on about 25% of the pins. S1B.png The legs/pads …

Re: Voodoo 2 component map

Posted on 2024-02-06, 09:40

in Marvin \ Video
The one near the PCI is the FBI. The 0MB detected FBI error can be caused by: -broken FBI traces -broken FBI -broken RAMDAC or 14.318MHz crystal -broken ferrite beads that power the RAMDAC -a specific FBI RAM IC broken in a specific way so that the FBI can't initialize the RAMDAC anymore and can't …

Re: Voodoo 4/5 DVI maximum resolution in 2D mode

Posted on 2024-01-29, 18:30

in Marvin \ Video
@Dolenc Bless you! I first changed the timings from [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\3dfxvs\Device0\TIMINGS\1920,1080\60Hz] to the ones you provided, and it behaved the same, the output was 960x1080p. After I changed the timings for DEVICE1/2/3, and it works! 20240129_202302(1). …

Voodoo 4/5 DVI maximum resolution in 2D mode

Posted on 2024-01-29, 15:48

in Marvin \ Video
A bit of a weird question, but I'm trying to get 1920x1080p DVI output out of the VSA 100. If a resolution above 1600x1200 is set, the image looks weird. At first I thought it's a limitation of the TMDS encoder used on these cards, SIL164, which states UXGA as the maximum resolution. I replaced the …

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