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Greetings!

I have a problem reading ATA drive in PIO mode.
After IDENTIFY command, i get correct status (ready to read, not busy, no error), but every byte from 0x1f0 is 0xFF.

This is a minimal code, i wrote for you:

OutPortByte(0x1f6,0xa0); // Drive select
OutPortByte(0x1f7,0xEC); // Identify
InPortByte(0x1f7); // Delay
InPortByte(0x1f7);
InPortByte(0x1f7);
InPortByte(0x1f7);
DirectPrintDecimal(InPortByte(0x1f7)); // prints 90 -- 0b1011010
DirectNewLine();
DirectPrintDecimal(InPortByte(0x1f0)); // prints 255 -- 0xFF
DirectNewLine();
DirectPrintDecimal(InPortByte(0x1f0)); // prints 255 -- 0xFF
DirectNewLine();
DirectPrintDecimal(InPortByte(0x1f0)); // prints 255 -- 0xFF
DirectNewLine();

and so on...
It does the same while read operation too.

Could not find any articles about this problem (or mistake).

Thank you.

P.S. I am coding the driver by osdev wiki topics.

Is this on real hardware or on an emulator? You need to be reading WORDS (not bytes!) from port 0x1f0 for one thing.

Oops! stupid mistake!
Problem solved.
Thank you very much!

I use Bochs emulator with correct configuration.