g4 from Yikes does not boot in a rev3 G3 Beige MT

[pizzigri]

I took a g4/350 zif from a working Yikes machine (I had it on for a few hours to check - it had to be recycled and the HD destroyed) and i wanted to put it in my Beige G3/300 to upgrade it. I had great care of the CPU. So today I open the machine, remove the original G3 and place the G4. Remove the battery, and press CUDA button for a few secs. Jumper the config block for 366 and power the machine. Nothing - no bong.
So I reconfig for 333. Nada. 300? not a chance.
Replace the CPU back to its G3, and voila, bong! It was at 300 after all. Sojust for kicks, I OC to 333 and obviously works. Lost all settings and date/time, but I was expecting that.
Why it does not work? I'm quite positive tha CPU was OK....

BTW, no I could not save it. The G4 was in the inventory and HAD to be recycled, they actually check SN and stuff.

 

[macuserman]

Did you put the G4 compatible firmware on the machine first? You can't just swap in a G4 without updating the firmware to support it.

 

[pizzigri]

Hi Macuserman!
i was under the impression that only the B&W G3 needed that, not the beige - in case that’s… ehm the case, where would I find an updated firmware? The Beige G3 has a ROM dimm in it

 

[macuserman]

Hi Macuserman!
i was under the impression that only the B&W G3 needed that, not the beige - in case that’s… ehm the case, where would I find an updated firmware? The Beige G3 has a ROM dimm in it

Hmmm I was pretty sure they both did, but perhaps someone more sure of themselves can answer. I think you can run sonnets updater or any other company without issue, no real reason not to as far as I know. They all did the same thing and that is just to get rid of the G4 check.

 

[Unknown_K]

Open Firmware is what you are updating and that started being used around the Powermac 9500 I believe.

You also might have to replace the VRM on select machines to run a G4:

https://eshop.macsales.com/tech_center/index.cfm?page=zif/VRM.html

Step by step on installing a OWC G4 ZIFF (note you need software to enable cache):

https://eshop.macsales.com/tech_center/index.cfm?page=/manuals/item/g3org4zifupgradebeigeg3.html

And finally, a Yikes is just a B&W G3 motherboard of specific revision that uses ZIFFs at 100 Mhz FSB while Beige G3's can do 83 or more commonly 66 Mhz.

 

[pizzigri]

That was GREAT
i managed to make it boot however it freezes hard once it loads the extensions in 9.2.2 - I have a flashed r7000 and installed the ? latest ? Driver for it.
but at least it’s a step forward!!!!

 

[macuserman]

That was GREAT
i managed to make it boot however it freezes hard once it loads the extensions in 9.2.2 - I have a flashed r7000 and installed the ? latest ? Driver for it.
but at least it’s a step forward!!!!

Does it boot fully with extensions disabled?

 

[pizzigri]

Yes it does. Then I removed the Ati Radeon 1.0 driver from the installer and it boots normally - so it’s the ati driver