Power Computing PowerBase machines have different base addresses for several
of their variables in NVRAM.  Plus there is a different OF display device
so here are the things you need to set in order to run linux-pmac from an
external SCSI disk (don't think you can boot from IDE disks yet)
 
boot-device: 	scsi/sd@1:0  or whatever device your root partition is on.
			or fd:vmlinux.coff for booting from floppy.
boot-file:	/vmlinux    if you're booting off floppy, set boot file to ' root=/dev/sdaX' (X is your root partition number) -added by wj@acpub.duke.edu
real-base:	FFFFFFFF           
real-size:	00100000
virt-base:	FFFFFFFF
virt-size:	00100000
load-base:	00004000
pci-probe-list:	FFFFFFFF
screen-#columns:00000064
screen-#rows:	00000028
selftest-#megs:	00000000
 
boot-command:	boot
input-device:	kbd
output-device:	/bandit/ATY,mach64_3D_pcc
nvramrc:
diag-device:	fd:diags
diag-file:
oem-banner:
oem-logo:
 
Thanks to Paul McKerras for poking around to find these values.
 
As far as I know, X does not work yet due to lack of ATI graphics card support
and my ethernet card is not OF aware so nothing there yet.  As a standalone
device though it's wonderful!
 
Steve Eyles (eyles@chemistry.umass.edu)
 
For the latest version of Boot Variables check out
http://www.cis.syr.edu/~fadushin/linux-pmac 
 

As of April '98, the ATI video card is supported, although funny things can 
happen with XWindows (parts of window drawn partially off screen, ocassional 
white screens which can necessitate a reboot.)  Black spots usually show up in 
text mode.  It is still readable but fairly annoying. The easiest way to solve 
that is to compile a kernel that uses the black background instead of blue.  If 
you need help on that, check out the faq on getting sound to work.  It walks you 
through the process. 


Sean Olson