> To properly read TBL and TPU to form a 64-bit result, is there a magic
> sequence to catch TBL rolling over between the maser's? Or is it done
> the old-fashioned way?
Possibly this is the "old-fashioned way", but it's the best I know :
mftbu r5 # load upper word of time base
mftb r4 # load lower word of time base
mftbu r3 # re-read upper word
cmpw r3,r5 # check that upper word didnt change
beq got_time # If not, branch
mftb r4 # It changed, have to get new LSW to match
got_time: # (result in r3:r4)
[None] made the following annotations
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