24 Sep
2023
24 Sep
'23
12:22 p.m.
Hmmm, did littel reading in the OpenFirmware manual I linked above. There is an example
how to use show-devs for listing the existing devices. The example contains...
/virtual-memory@0,0
/memory@0,0
/counter-timer@1,f3000000
/eeprom@1,f2000000
/openprom
So being lucky, the hex numbers given are the physical (non-mapped) address of memory,
eeprom and counter-timer (=NVRAM). A check would be using the firmware's read commands
to see if there is information starting at f3000000 and more specific whether the
locations f3001ff9 - 73001fff show any change (that is the location where the real time
clock should appear if there is a NVRAM at this location.