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AHCI projects? (Developers)

posted by DOSferatu, minneapolis, mn usa, 31.03.2010, 15:59

> Hello
> I'm interested about your ahci code.
> I'm not a programmer and I have trying to enable ahci on some notebook but
> vendor doesn't provide this option in bios.
> I have managed through a pci option rom to rewrite ICH7-M registers to
> switch controller in ahci mode but then bios can't boot from fixed disk.
> But if I boot from usb some linux distro I can see is in ahci mode and can
> get access to disk.
> That explain why I'm intersted about your ahci code.
> I hope this will help somehow in my tries to regain access to boot from
> disk.
> Thanks.
> I forget to say,I have tested also with AHCCMDT from ata-atapi.com and
> their software can find and gain access to disk when I use this trick to
> switch controller to ahci but is only for testing.
Hmmm.
So my code would have to be converted into a BIOS int-13 extension loaded through your PCI option rom. that would allow you to boot the device, then your OS would load an ahci driver. If you are only using DOS for your OS, no driver would be required. Doable I think, but I doubt performance would be any better. Performance is only better when you can utilize a lot of system memory and have many outstanding IO requests at a time.

I don't have the time to work on it though, and whoever did do this would need the hardware to test it with-this is not something I could write at home and just send to you without many hours of debugging.

I guess I have to ask what/why are you trying to achieve with this setup?

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