To view the OpenBoot release information for your firmware, as well as the system configuration, use the following command:
ok banner SPARCstation 20, Type 5 Keyboard ROM Rev. 2.4, 256 MB memory installed, Serial #456543 Ethernet address 5:2:12:c:ee:5a HostID 456543
Here, we can see the system is a SPARCstation 20, with a standard keyboard, and that the OpenBoot release level is 2.4. There are 256MB of RAM installed on the system, which has a hostid of 456543. Finally, the Ethernet address of the primary Ethernet device is 5:2:12:c:ee:5a.