Re: fw1 not created for dv-camera
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From: Clemens L. <cl...@la...> - 2011-08-01 06:20:47
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Stefan Richter wrote: > Interestingly, the two nodes start with gap count 44. The camcorder must > have sent a PHY config packet for that before the fw-ohci link was > switched on. The IRM in Sony DCR-TRV25 sets a gap count of 44 too. I > wonder who chose this, and why. Perhaps somebody at camcorder vendor X > chose it as "better as 63 but still safe for every hop count that will > presumably ever happen in practice", The gap count value for the _theoretical_ maximum of 16 hops is 43; probably somebody decided to add one just to be sure (especially after it was found out that IEEE1394-1995 had specified wrong gap counts that were too small). Regards, Clemens |