reset non-volatile ram

M

marto

Registered
I installed a diferent computer hd on my g3 and it doesn't boot anymore I read in this forum taht reset the non-volatile ram fix the problem but how to do it?
waht I have read is that you have to enter in open firmware and run some commands.
Waht I know is to start option+apple+o+f and you go to the firmware(or waht I understand for firmware)taht is to make changes a lower level as the bios en pc I imagine.
any cultured guy to help
Thanks
 
Boot into Open Firmware then at the prompt type:

reset-nvram
reset-all

The system should reboot afterwards.
 
What kind of G3 do you have? Some of the G3 machines (the beige ones) don't let you have OS X on a partition bigger than 8GB, and that partition has to be the first partition on the drive.
 
my HD is 4gb ,
the thing is it doesn't start any more from cdrom eider ,I have tried with OS 9, OSx 10.1, OSx 10.2 and linux CD and doesn't boot.
I think it could be a proteccion that the os have to prevent swap HD with OS betwen machines that install somthing or change somthing on the boot secuence.
my prom setings are:
open firmware, 2.4
"printenv"=

Variable Current Default

little-edian false false
real-mode? f f
auto-boot? true true
diag-switch? f f
fcode-debug? f f
oem-banner? f f
oem-logo? f f
use-nvramrc? f f
real-base -1 -1
real-size 100000 100000
virt-base -1 -1
virt-size 100000 100000
load-base 4000 4000
pci-prove-list -1 -1
screen-#colums 64 64
screen-rows 28 28
selftest-#megs 0 0
boot-device /AAPL,ROM /AAPL,ROM
boot-file
diag-device fd:\diags fd:\diags
diag-file
input-device kbd kbd
outpout-device screen screen
oem-banner
oem-logo
nvramrc
boot-command boot boot


if this correct in order to boot normaly or something change my defaults settings?
 
marto said:
my HD is 4gb ,
the thing is it doesn't start any more from cdrom eider ,I have tried with OS 9, OSx 10.1, OSx 10.2 and linux CD and doesn't boot.
I think it could be a proteccion that the os have to prevent swap HD with OS betwen machines that install somthing or change somthing on the boot secuence.
Click to expand...
Since you cannot boot from anything including CDs since changing the HD, I would suspect an error in the drive installation. Some possibilities that come to mind are:
  • incorrect jumper settings on the new HD
  • cable connectors not correctly seated on the drives or logic board
  • static shock that fried something on the logic board (did you wear a grounding strap when you were mucking around inside?)
  • a bad HD
Now for some cautions about running OS X on your G3:
  1. 4 GB is the absolute minimum hard disk needed for a functional copy of OS X, if there are no other applications installed. The 8 GB limit for some early G3s, iMacs, and PowerBooks is just enough to run comfortably.
  2. since you only have a 4 GB HD, how much RAM do you have? OS X requires an absolute minimum of 128 MB and 320 to 512 MB is more realistic if you want anything approaching acceptable performance on a G3 of that vintage that has not had a serious CPU upgrade. OS X is very picky about RAM quality and even though you have the required 128 MB or even more, if the RAM is not of sufficient quality OS X may not be able to use it. The only test I know of that will work is removing a suspect DIMM and if there is enough RAM left see if the machine will boot.
  3. since you have swapped the HD you may well need to reset the CUDA switch. You most certainly will need to reset the CUDA if you change or add RAM. The CUDA is a small black button usually located in the immediate vicinity of the PRAM battery on the logic board. Unplug your G3 then press and hole the CUDA button for five or six seconds. Then button up and try rebooting.
 
Well..
I have tryed everything posible suda,pram,reset nvram,set-defaults,live only my best ram stik(original 32mb), my hard drive works , because I formated it as a external firewire in my powerbook(yes installing os9 drivers).
if I'm geting to ask about the firmware and the boot secuence is because I have really research and try evrything i have found.
any real help please.
thaks anyway
 
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