Could a one-time error in U5 (and no further errors have been seen in Witchery tests) indicate that this memory module is truly broken?
Voodoo 2 produces an image in games similar to that in this post: Re: Voodoo2 diagnostics software (Witchery)

vorobaz wrote on 2026-03-16, 07:30:

Could a one-time error in U5

Well I don't see a "one-time" error, I see 137680 errors in U5!
Witchery hides verbose output by default but you can launch it with "-v" key and see full log with all the errors.

Data mask suggests that there's a problem with one particular bit - bit 5 of U5.
If previous (RAM connection) test runs fine then probably U5 itself is bad.
Or maybe there's a flaky connection on bit 5 that has to be checked/resoldered.

Fagear wrote on 2026-03-16, 17:04:

...Or maybe there's a flaky connection on bit 5 that has to be checked/resoldered.

Thanks, I'll try soldering U5 first - it doesn't look like any pins have come loose from the board.

oh well, if I still had my Miro Hiscore2 card...

Awesome tool!

Huge thanx for this.

Hi!
I have un Maxi Gamer 3D² with problems.
Textures are not good, contant points inside.

I already reflow FBI TMU0 and TMU1, add missing C95, changing C44 (constant resistance when I heat it, see BuB video for piero electric effect), no effect.

I tested witchery, no error detected

Do you have any idea what is the problem of this card and how to fix it ?
It could be a defective EDO RAM but i don't know how to find which EDO chip is broken.

Can you help me ?

SylvainA wrote on 2026-03-29, 22:34:

Do you have any idea what is the problem of this card and how to fix it ?
It could be a defective EDO RAM but i don't know how to find which EDO chip is broken.

Well, problem is definitely with TMU's RAM. And Witchery can not help with that yet.
Look for bad resistor networks around both TMUs. Even if those look ok, check each of 4 resistors inside with a multimeter, resistance should fall within 10% of what written on the network. "220" means 22 x 10^0 = 22 Ohms. So 19.8...24.2 Ohms is ok, if out of range - replace the whole resistor network. I've fixed one V2 just some days ago with silimar texture issues, replaced 6 (six) networks around TMUs.

Hi.
Thanks for your quick answer and congrats for your super job, witchery is an amazing tool !
I tested all that "blue 22R" resistor networks around both TMUs, and all values are within 22.6-22.9 Ohms range.
So they seems to be in good condition.

What could be the next step now ? I don't know how to process.
Please note the card is a 12MB one.

Oh I've been waiting for this since first seeing it on BuB, I have a couple of faulty V2's and one which has done my nut in trying to fix, it had ALOT of loose & bent pins on a TMU and the FBI, I ended up removing the FBI and straightening all the pins before resoldering, sorted the TMU pins, replaced a couple of missing/broken caps but the card has never worked, it was detected in windows in the drivers, all the ram in place etc, it just black screened when trying to launch anything, same in Mojo, no faults, so I was at a bit of a loss, I even swapped the Ramdac off another broken one just out of desperation.
Nothing worked, I assumed it was ram so I bought a reel off aliexpress a while back but didn't want to just go changing them all without knowing, I saw Witchery on BuB and waited patiently.
My day finally came, you absolute legend releasing to the community, it really is an amazing community isn't it?
Anyway, my faulty Voodoo 2
Witchery result
There's af ault on the Ram "FBI Ram IC U21"

Replaced U21

Passed Witchery Tests (lost my f**n mind)

Booted Windows
Launch 3dmark

Boom !!
Works perfect
Fainted
Honestly, cannot thank you enough, it's an epic program that seemingly will only get better, it worked perfect for me, thank you thank you thank you !!!!
LEGEND !!