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Re: Voodoo 2 repair, missing legs on Chuck

in Marvin \ Video
TMU pin 128 seems to be supply voltage - did you mean 208? Weird typo on my behalf, yes, I meant pin 208. I still find it weird that the only other connection of that net seems to be pin 62 of the RAMDAC - which the datasheet describes as "Not connected – leave floating or tie to ground". Some V2 …

Re: Voodoo 2 repair, missing legs on Chuck

in Marvin \ Video
You're right, it's not directly the PCI reset signal, but it is a reset line for the TMUs. The TMUs are chained, the data from TMU1 needs to go to the FBI, but it doesn't have a direct connection, it goes through TMU0. If TMU0 is busy with other stuff, it asserts the stall signal. Same goes for the …

Re: Bare 3Dfx Voodoo 2 board pictures

in Marvin \ Video
You can figure the direction by looking at the position of the series termination resistors (10-22-47R), they are placed near the source. The best is to check on cards based on the older reference design (like CT6670), as the newer reference design is missing some, IIRC for the TMU output.

Re: Bare 3Dfx Voodoo 2 board pictures

in Marvin \ Video
The architecture is something like this: FBI: -unidrectional (output) 16 bit DDR data bus, going to both TMUs. Besides the 16 bit data bus there are also some address pins (since the TMUs are connected on the same bus) and CLK. -unidirectional (input) 16 bit DDR data bus, coming from TMU0, similar …

Re: Bare 3Dfx Voodoo 2 board pictures

in Marvin \ Video
"Important Note: Throughout this document, features, descriptions, and specifications which are marked withthe * symbol are not present in the Alpha version of the Voodoo2 Graphics chipset. Polygonal anti-aliasing* Ultra-fast full-screen clears using SGRAM color-expansion capability* Embedded RAMDAC …

Re: Bare 3Dfx Voodoo 2 board pictures

in Marvin \ Video
https://drive.google.com/file/d/1Z3agg_YqD1w0k5A2LY4O6-Qi_fnpgEmf/view?usp=sharing Innovision card, it had a ripped TMU (& pads) and was quite unfixable. This link might also help, check first posts: https://www.vogons.org/viewtopic.php?t=73378 I should have a dxf file with the top layer, and scans …

Re: Quantum3D Mercury Brick Personal Recreation

in Marvin \ Video
Old FPGAs are not supported in current versions of Vivado/ISE/Quartus etc, which means you'll probably need to find a license (or maybe even a dongle) for the old tools, and run the thing in a VM. A cheap Spartan 7 is most likely up to the task, and you can use the free version of Vivado. The FPGA …

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