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lien xlr8yourmac
Script :
How to edit and store the NVRAMRC for 133MHz bus
(1) Boot by holding down "Cmd" + "Opt" + "O" + "F" keys to enter the OpenFirmware terminal.
(2) Enter the NVRAMRC editor. ( shows you should type "return" key)
nvedit
(3) Type following script exactly (including space).
" /" select-dev
7efdc44 " clock-frequency" get-my-property 2drop !
" /cpus/PowerPC,G4@0" select-dev
1fca0554 " clock-frequency" get-my-property 2drop !
7efdc44 " bus-frequency" get-my-property 2drop !
1fbf711 " timebase-frequency" get-my-property 2drop !
(4) Type "Cntl" + "C" to exit NVRAMRC editor.
(5) Save the script
nvstore
(6) To enable the NVRAMRC, type this command.
setenv use-nvramrc? true
(7) Reboot with new timebase constant.
reset-all
If you fail to edit the NVRAMRC or need to return to the 100MHz bus, you can clear the changes by resetting the nvram, booting by holding down "Cmd" + "Opt" + "P" + "R".
![[image]](blog/image33.jpg)