Restoring Ultra 5 NV ram info

This set of notes resets a serial into a Sun ultra 5 after power on, or replacement

Note that the BIOS battery in this unit has expired (the system was manufactured 17 years ago after all).  When you initially power on the system, you will need to program the PROM serial number and manually boot the system.  The procedure to program the PROM serial number follows:

1.) Invalidate the PROM XOR checksum:

57 f mkp <enter>

2.) Program the PROM's Serial number:

8 0 20 2b 59 d2 2b59d2 mkpl <enter> <ctrl-d> <ctrl-r>

3.) Reset the system so that the system detects a proper serial number during POST:

reset <enter>

4.) Boot internal hard drive:

boot disk <enter>

*If you need to stop the system, press <stop-a> to get to the "OK>" prompt.