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Hi! I am a Chinese.I am doing a pmode kernel,but I do not know how to do a 32-bit pmode ata disk driver.Could you help me or give me any messages for developing it?
My Email is at [email protected]

Hi,
I've never written a ATA driver of my own but I can give you some links that may help you:
http://www.ata-atapi.com/
http://www.repairfaq.org/filipg/LINK/F_IDE-tech.html
http://www.cyberscriptorium.com/index.php   (search for "atapi")
http://www.singlix.org/trdos/specs.html

cheers,
gaf

This can be as simple as wrapping a few routines around the standard ata PIO interface, or if you are after performance then you must use chipset documentation regarding the ATA/IDE controller.  The controller datasheets allow you to configure your drive for more advanced modes such as bus master support of offload the work from your cpu.  Also UDMA support can only be enabled by communicating directly with the controller.

I've developed a generic ATA wrapper around the PIO method for legacy hardware - or ones that i haven't written a driver for. Bus master support for Intel PII3 and VIA chipsets is complete. It?s not that complicated but i suggest that you get the ata specs, preferably the latest one as they are all backward compatible.

cheers
orb

You can take a look at my driver
  http://www.falconrybells.co.uk/
And down load TestOs.zip

ASHLEY4.