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Altera_Forum's avatar
Altera_Forum
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19 years ago

Driver support for OCIDEC ATA core?

I'm trying to stand up a system with the OCIDEC ATA core, and it seems as if the device driver is a little ... stale. Before I dive in and try and fix it, I thought I would ask if anyone has alr...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

I would LIKE 25 - 35 MB/sec, but could live with 12- 15 MB/sec. With the "stock" ALT-CF core I get ~0.8 MB/sec; after applying your timing tweaks I top out at about 2.5 MB/sec.

I understand and agree with your concerns about the potential overhead of copying buffers, but I don't think I'm there yet. If I take the same hard drive and connect it to a Windows desktop configured for PIO mode 4, Windows get essentially the same 2.5 MB/sec performance. (I think it was actually 2.6, but that's from memory.) Based on that, I think I'm maxing out PIO mode, not the Nios II. Does that make sense?