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 PostPosted: Fri Aug 31, 2001 9:36 am 
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Joined: Fri Aug 31, 2001 9:19 am
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Hi to all , specialy Nil thanks man for verifying new 1.22 patch :D But now I have problem with playback of films on my pioneer 106s (small hickups sometimes) . Pioneer 106s drive is configured like master and my ricoh cdrw (supports only PIO mode 3, that is 11.3 mb/s transfer rate) is slave on same sec. channal. If I dissconect cdrw from a secundary chanel everything is back to normal (no hickups). why is this happening ? Is it maybe pioneer 106s slowdown to PIO 3 mode if connected together with cdrw drive or what? some idea? Nil? /tnx sLettem p.s I have PIII-800, GeForce2, 256 mb ram , winMe and using winDVD player had same problem with 1.22 and 1.09 firmware , so it's not that...


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 PostPosted: Fri Aug 31, 2001 12:53 pm 
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Joined: Sat Aug 25, 2001 2:57 pm
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So you're mixing an ATA4 transfer mode with a PIO3 mode, huh? My guess is that as usual, [i]loosedows[/i] finds the need to inquire your CDRW every now and then --especially when it has nothing to report-- just for the sake of slowing down the system... When this happens, the IDE secondary channel is switched to PIO mode 3. During this time, ATA4 (UDMA66) transfers are delayed. I don't think software players use much bufferisation, and a small delay in the continuous DVD transfer could explain a hickup. Moreover, do you remember how software players warn you to activate DMA on your DVD drives? This is because PIO is not Direct Memory Access, and thus needs the CPU to intervene. But then a wait by the CPU for the reply from the device slows the MPEG2 decompression down (or even pause it) and might explain what you see. If those hickups happen at a regular interval, that's probably the most logical explaination. If you can avoid it, you shouldn't mix UDMA and non UDMA units... Other people report the same thing?


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