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.
How do I regain access to the AHCI BAR (ABAR), located above the 1 MB line, now that GRUB put the CPU into 20-bit/1-MB real mode? There are no I/O ports on this card. PCI Firmware 3.0 states the CPU will be in Big Real Mode and A20 will be gated. It was until GRUB changed the CPU mode. -- rcpao.enmotus _______________________________________________ Help-grub mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-grub
