ATA PIO IDENTIFY return data

makerimages · Post by **makerimages** » Wed Dec 16, 2015 2:21 am

Hi

I've gotten to a point where I have paging enabled, finally. The next step would be to write the disk and filesystem drivers. I've read trough most of the ATA PIO article on the wiki, and I have a question now.. Is there a complete structure for data returned by the IDENTIFY command? What other data, besides the stuff listed here does it return?

Kevin · Post by **Kevin** » Wed Dec 16, 2015 3:02 am

There is a lot of information in there. Just read the section on IDENTIFY in the ACS-3 spec, it has a long table that describes each word in the IDENTIFY data. Starting to read the spec instead of relying only on secondary sources like the wiki is a good idea anyway as soon as you get to non-trivial hardware like IDE.

makerimages · Post by **makerimages** » Wed Dec 16, 2015 10:32 am

K, that table is loong. Is there a drop-in structure for loading this into, or how would anyone efficiently load the 256 words into something useable?

Combuster · Post by **Combuster** » Wed Dec 16, 2015 11:37 am

makerimages wrote:or how would anyone efficiently load the 256 words into something useable?

Defining that packed struct as appropriate. It's probably faster than finding one you can reuse without copyright issues.

OSDev.org

ATA PIO IDENTIFY return data

ATA PIO IDENTIFY return data

Re: ATA PIO IDENTIFY return data

Re: ATA PIO IDENTIFY return data

Re: ATA PIO IDENTIFY return data