I'm trying to boot a Diamond Systems Hercules II board from and external CD using a runtime kit ISO I created following 
the recipe from the relevant technote. I get the message "Operating System not Found". Booting a similar 6.4.1 runtime 
kit worked much better (though not perfectly). I tried two different 6.5.0 CDs, and they both worked on other systems.

I realize this is very little information to go on, and I'm happy to fill in whatever details are most relevant. Does 
anything come to mind as being a significant change from 6.4.1 to 6.5.0 that would cause the boot to fail seemingly 
before getting started? It doesn't seem as though dropping a driver would cause a failure so early in the process, but 
maybe I'm wrong on that.