Re: ATA Ultra DMA on the PP5020

2008-12-24 Thread Alex Bennee
On Wed, Dec 24, 2008 at 5:44 AM, Boris Gjenero boris.gjen...@gmail.com wrote: Hi, I'm wondering how to proceed now. Is there interest in this, or is the current way good enough? Should I continue to work on my modified ata.c? Should I merge the DMA code with Rockbox with a minimum of

Re: ATA Ultra DMA on the PP5020

2008-12-24 Thread Bryan Childs
On Tue, Dec 23, 2008 at 9:44 PM, Boris Gjenero boris.gjen...@gmail.comwrote: I got Ultra DMA working on my 5th generation 30 gig iPod. Mode 2 (33.3 MB/s) seems stable, and it doesn't need CPU frequency boost. I've also used mode 4 (66.7 MB/s), but that required boosting and I didn't test it

Re: ATA Ultra DMA on the PP5020

2008-12-24 Thread Boris Gjenero
On 24/12/2008 2:46 AM, Mike . wrote: This sounds like a pretty big improvement. Even if CPU time isn't decreased, the higher transfer rate would still give a large improvement in battery life due to faster spin down of the disk. Compared to boosting, the disk uses a very large amount of power.