On Wed, May 9, 2012 at 4:01 PM, Jordan Uggla <jordan.ug...@gmail.com> wrote: > On Tue, May 8, 2012 at 3:05 PM, Roger C. Pao (Enmotus) > <rcpao.enmo...@gmail.com> wrote: >> I'm writing an INT 13h Option ROM for an AHCI-like PCIe adapter. I've >> noticed that after prot_to_real is called, My INT 13h no longer has >> access to addresses like es=0:edi=00067BB4. > > Grub 0.97 hasn't had an upstream for over 6 years. If you can > reproduce this problem with grub2, (meaning grub 1.99 or ideally grub > 2.0 beta5) then you can try asking about it at grub-de...@gnu.org. > > -- > Jordan Uggla (Jordan_U on irc.freenode.net)
As a follow up, I have resolved the problem as follows: Inside my INT 13h handler, I re-enabled Big Real / Unreal Mode to gain access to the entire 4 GB range including the AHCI BAR. I have now successfully booted GRUB 0.97 and Fedora 14. GRUB 1.99 and Fedora 16 will be next after I figure out some issues with PMM allocation of permanent memory. It seems ASUS P8Z68-V LE BIOS prior to v3702 will allocate permanent PMM memory per PCI Firmware Specification v3.0; however, BIOS v3702 fails. So I'm back to allocating from EBDA again. But this is not a GRUB issue. -- rcpao.enmotus _______________________________________________ Help-grub mailing list Help-grub@gnu.org https://lists.gnu.org/mailman/listinfo/help-grub
