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UIDE and AHCI support (Miscellaneous)

posted by RayeR(R) Homepage, CZ, 12.06.2010, 13:27

> I booted up an intel desktop board with a believe an ICH10 on it. E210882
> might be the model number?
>
> Anyway, AHCI mode is on in BIOS, booted to DOS, went to the AHCI memory
> mapped registers and disabled AHCI by turning bit 31 to 0 in BAR+4.
> I then did an INT 13 read from the drive and after 30 seconds or so, it
> timed out with CY set an a 0x8001 in AX.
> This is a good sign, in that it looks like the BIOS is well behaved.
> This of course cripples all INT 13 functions that touch the drive.

Thanks for testing, this is what we expected. I think it would be needed to unload current AHCI BIOS Int13h services and reload standard BIOS for IDE mode - if BIOS still contains it at all...
But if you try to run some low level disk utility from a floppy it should now see the HDD via standard IDE port.

---
DOS gives me freedom to unlimited HW access.

 

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