RE: Re: Programatically determining BootROM version?

Sigh.  I’m wrong.  The new path needs to be used for the Intel machines.

I had structured the code to use a subroutine to try to find the path, and throw on failure. I would then catch (at a higher level) and try with the new path.

Apparently stepping over the subroutine threw, caught, and called the subroutine again with the new path and then hit the end of the ‘step’, so it looked exactly like the original path was found.

Sorry for the mis-information.

Dave

 

 

Hmmm…  Apparently the old path works on the Intel machine even though the IORegistryExplorer doesn’t show that path available.  Asking for “version” in the “:/rom” path works as well, perhaps the older method was preserved for compatibility?

 

David Litwin

BigFix

 

 

This question was answered a few years back, but on an Intel Mac this path does not exist.

It seems like on Intel the path would be “:/rom”, with the key being “version”, as that data matches what System Profiler displays for its Boot ROM Version field on my Intel dev machine.

 

Is there any official information on how to get this (I couldn’t find much searching for it)? I can code things to look for the PPC path first, then fall back to the location I’ve found it on my Intel machine, but this is just what I’ve found poking around myself, and who knows if I can rely on this for all machines.

 

David Litwin

BigFix

 

 

 

Garth Cummings writes:

 

Take a look at the IODeviceTree plane, Root > rom@xxxxxxxx > boot-rom@xxxxxxxx. That node has the BootROM-version property.

 

You can create a matching dictionary for this using:

 

IORegistryEntryFromPath(kIOMasterPortDefault, kIODeviceTreePlane ":/rom/boot-rom");

 

HTH,

gc