[LinuxBIOS] Can't boot from IDE on vt8237r

Peter Stuge peter at stuge.se
Sat Jul 28 08:38:05 CEST 2007

On Sat, Jul 28, 2007 at 12:07:51AM -0400, Corey Osgood wrote:
> > How is the device configured? cmd_base and ctrl_base are hard-coded
> > in FILO when the device is in compatibility mode. The IO ports are
> > only read from PCI config space for native PCI mode controllers.
> Bingo, that explains it. The device defaults to different IO ports
> than FILO expects, the same IO ports that SATA defaults to. Oops.


> > Also - can you try not setting the IDE device to compat mode but
> > rather to native PCI mode - compat is for DOS anyway. ;)
> Tried that as well, with no luck:


> I'm about to go through the fun of disabling the SATA device and
> see if I can get IDE working without having to worry about that
> conflict, and then try to get at least one mode working.

You can of course also hack the correct ports into FILO at least for

If you make cmd_base port n and ctrl_base n+0x204 just change to
#define IDE_BASEx n
right at the start of ide.c and find_ide_controller_compat() should
do the right thing.


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