On 2013-05-03, at 20:43, silverdr@wfmh.org.pl wrote: >> I would use CIA counters instead of VIC frames, it will be faster. > > You mean the TIMA/TIMB timers? Like counting the cycles with them? Hm.. might work too. It could be on one hand even better due to eliminating the dependency on VIC's presence, but I think it would require chaining both timers as 16 bits would not be enough to get reliable readout. I /think/ something around half of a second should be already reliable (TOD goes down to tens of second only). I hoped for half a second. I did some tests and half a second doesn't work reliably. There are (rare but still) cases where I can read "5" from TODTEN with both 50 and 60 Hz supplied. Therefore counting 50/60 rasters (1 second) gives so far always non overlapping results. But it's still twice the time I expected that is basically lost on waiting. I take nobody has any better ideas on how to detect the TOD supplied frequency? -- SD! Message was sent through the cbm-hackers mailing listReceived on 2013-05-20 21:01:01
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