iMac G5 won’t boot. Open firmware - LOAD-SIZE is too small

[MrPowerPC]

Hi
I have a iMac g5 that originally was running os 10.4. I managed to successfully install OpenBSD and managed to get it to boot by going into open firmware and setting it to setnev boot-device:, hd

Everything worked well but I couldn’t find a browser that worked, so today I decided to instal the ppc version of NetBSD 9.0
First, I reset the pram (cmd alt p r) and then after that it wouldn’t boot into anything. Every time I attempted to boot the cd or hd It just came back with load size too small. If I just let it boot without entering open firmware then I just get the no bootable device screen with the finder logo on a os9 style folder. I have tried reset-nvram, set-defaults, and reset-all, but nothing works. I can’t even get the openbsd cd to work, which originally booted without any firmware commands. For the openbsd, I only needed some firmware commands to boot from had once installation had finished, not just to boot to cd.

I am totally confused. Any ideas?

 

[MrPowerPC]

UPDATE:
I have managed to reinstall AND boot OS X tiger, but still unable to boot the netbsd or openbsd dvd...

I have tried

boot cd:, ofwboot

but it comes back with

MAC-PARTS: LOAD (noninterposted) not supported load-size=0 adler32=1 LOAD-SIZE is too small



When I (successfully) installed openbsd on this iMac, I only had to go into firmware so that it would boot from the HD after installation, not for the cd to boot. To do that, I input setenv boot-device hd:, ofwboot

and that worked (for booting to the openbsd installed hd), but now I can’t even boot a ppc bsd.

 

[MrPowerPC]

I also tried to boot the Debian ppc, but no luck... even with boot cd:, yaboot

it seems to refuse ANYTHING other than OS X now

 

[Tratkazir_the_1st]

boot cd:, ofwboot

Try boot cd:,\\:tbxi