http://sidneys77crlfslcr7zmj3msmxchgnxhrxlp3p3kbaswo7twchjnicid.onion/retrocomputing/2024/10/04/booting-sun-sparc-servers.html
Pro tip, plugging an ethernet cable between the
Sun server and another machine can help here – otherwise the Sun server can spend a lot of time complaining about SUNW,hme0: Link Down - cable problem? . I plugged the Sun Ultra 1 into a powered on Raspberry Pi 3b
and it stopped complaining. Eventually you’ll be brought to a Unix login, assuming the machine is running Solaris.