@vinishor great post, one of my last projects for #Sparc is to prepare a minimal Solaris setup for them. I was booting them over the network (“boot net” from the ok prompt) and using Jumpstart to automatically install Solaris on them.
#OpenFirmware is an intersection system on its own, you can build your own from the source from https://github.com/MitchBradley/openfirmware
Thanks @simondassow for boosting this!