Mac OS 9 Discussion > CPU

Sonnet Encore/ST 1.8Ghz boot issue with Mac OS 9

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aBc:
This is indeed great news. Congrats!  ;)
(No need for the shovel to dig out that CD here.)

smilesdavis:
I will try and delete this file as setting up my 9.2.2/1.8 single core sonnet marathon setup was stopped by me not figuring out which extensions to disable

ubergrafik:
Ok, I have really gone down the rabbit hole… from one G4 this time last week, to four:)

I just got a G4 Gigabit Ethernet with the Sonnet 1.8ghz upgrade. Under OSX, all works well and is good. I have checked and the Boot ROM version is 4.2.8f1, as required for this processor.
Will I need to reinstall the original dual 500mhz processors (which I have), then do the thing for os9, or is there another way to flash it so os9 will be good? I have booted into os9, including with extensions off, but it gets to 99% of loading, then freezes. I assume this is because it hasn’t got the firmware upgrade for os9?

I am wary of swapping the processor unless its the only choice.

aBc:
Looks like YES... reinstall original processor and
make sure that the machine CAN boot into OS 9.

If not, then reinstall OS 9 or whatever is necessary
in order for it to actually, fully boot into OS 9.

Then follow the instructions...


Installation guide from Sonnet:
https://www.sonnettech.com/support/downloads/manuals/encore_st_1800_qsg.pdf

Be ye not afraid.

Besides, you can renew heatsink paste in the process. ;)

Afterthought:
AND / OR you might try booting into OS X and then
remove the 'Apple CPU Plugins' - FROM the OS 9 partition
(as mentioned above by nikdoof) just to see if that might work. :o

ubergrafik:
If I want to return the original processor BACK into a machine, do I need to do anything first? e.g. given the firmware was updated to put the new one in, does somethign need to be done to it to return it to original?

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