Technical data

52 Getting Started with PowerPC Open Firmware
When a formatted disk or tape is located, the following
prompt appears:
Formatted Disk/Tape Found At /pci/ccc/ddd
Save To This Device? (Y/N)
10. Type a Y if you desire to save the ROM image at this time to
the indicated device and disk or tape. If you type an N, the
save process halts and returns you to the Update The
Firmware menu. (Note: ccc = controller string, ddd = device
string)
Saving the ROM image takes approximately 1 to 2 minutes.
Update the Firmware ROM
Updating to PowerPC Open Firmware can be performed from
either of the following Þrmware images loaded in ROM and
running in the system:
❏ PPC1BUG (to update to PowerPC Open Firmware)
❏ PowerPC Open Firmware (to update to the current revision)
To Open Firmware Starting From PPC1BUG
1. Go to the PPC1-Bug> prompt.
2. Perform a pboot from the PPC1Bug command line and select
the bootable disk or tape as follows.
PPC1-Bug> pboot 1,0
This initiates a pboot from controller 1 (typically the floppy
disk controller) device 0. See the pboot and ioi commands in
the PPCBUG Firmware Package UserÕs Manual for further
details.
Executing the pboot command loads a RAM image of
PowerPC Open Firmware and passes control to it. The
contents of ROM have not yet been altered.
3. Continue with the steps in the following section to update the
firmware image in ROM.