The revival of luna68k
UniOS-B and UniOS-U/sigma are not adapted to Y2K.
But LUNA revived by the NetBSD/luna68k.
First, restore the NVRAM.
NVRAM is situated under the Network Card
NVRAM MK48T02B
side view
Separate the BATTERY PART from the RAM PART
Shave BATTERY PART block carefly.
Then you will dig out BATTERY and X'tal OSC.
Solder, a X'tal and a 3V of battery
complete
Isolate a battery. And bring back NVRAM to the socket.
THIS IS ALL.
When a NVRAM battery was emptied,
SPARCstation forgets his MAC address bat LUNA does not forget it.
LUNA got over Y2K by the NetBSD/luna68k