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It's interesting, I wonder if the Rev. 3 BootROM may have had a USB Open Firmware package? It would be kind of cool if it did, we would not need ADB KB after this mod. Someday I'm hoping some one will make the ROM SIMM for the Beige Mac's so we can do some ROM modding on these machines to add...

What about a photo optic CRT calibrator? It's an odd beast being ADB, but I don't have any CRT's to test it with.

https://web.archive.org/web/20031005035209/http://www.coolmedia.de/throughput/

Never mind, I found it.

There was a Mac OS 9 application called "Throughput" that tested the throughput to the PCI bus. I don't remember, I think it copied from RAM to VRAM and benchmarked the copy speed. Can anyone find a copy of it, please? The file name maybe "Throughput.sit" if you want to search your old drives...

https://forums.macrumors.com/threads/question-how-powerful-of-a-graphics-card-will-work-in-a-beige-power-macintosh-g3.2303689/page-17?post=31451697#post-31451697 Confirmed to work on the Beige G3 with G4 upgrades( Rev. A and Rev. C ROMs ) Likely we can get it working on any PCI Mac with a G4...

Not sure what you mean by PCI GPU for headless hardware acceleration in OS 9. If you mean you want to use the PCI card as a 3D accelerator without ever connecting a display to it, that really can't be done under OS 9. It works somewhat under OS X with ATI cards like the Radeon 9100 PCI, but...

No the Mach 5 CPU from a Kanas board will not work in a Nitro architecture logic board. The Mach 5 CPU has 1MB inline L2 cache running @ 100mHz on the CPU daughter card. As you have said the Nitro architecture 8600/200 had the L2 cache on the logic board.

That was my thought too.

Joy!peffpwpc

When you try the Flasher @jeremywork linked in post#5, if it flashes the card, but the card still doesn't work, keep the ROM on the card that it flashes and boot into Open Firmware with either another graphics card or via serial or telnet and get the .properties for the card. We want to see if...

Yes I learned a lot from Arti Itra, Joe van Tunen, and Daniel Jefferys as well as a few others. Though my hacks and trail and error I have learned to almost be an Open Firmware master, but I still have a lot to learn in the 4th before they will let me sit on the Jedi council.(y) May the 4th be...

So I checked the Voodoo 4/5 Flasher included in these tools, thanks @jeremywork, and it only checks the Vendor and Device ID's in the IODispaly Name Registry. 3Dfx Voodoo Drivers (1,2,3,4,5) + Utilities, Flash Roms - Macintosh Repository Oddly, as with most Mac OS 9 style PCI...

So you had flashed the card with a PC VBios and then flashed it back?

Thanks, I was unaware of this.

The Voodoo3 could be flashed to Mac on a Mac with tools 3dfx made public, I am aware of no such tools for the retail Voodoo4/5.

So today we are going to investigate to see if we can flash a PC Voodoo4 or Voodoo 5 to a Macintosh card suitable for PowerPC PCI systems. I don't own a Voodoo4/5 card and the retro computing realm for the PC has made them prohibitively expensive for me, but if you have such a card and you...

Yes, pretty much, I think the ATI guide directs you to push the Cuda reset button when you install the PCI card.

Nobody that has designed a custom PCB wants to comment on this?

Did you hit the Cuda reset switch?