I'm posting as an FYI.
I was testing BIOS A04 with a UFD (USB Flash Drive) but it probably
applies to everything that looks like a USB hard drive. My previous
statement was partially incorrect as I did find a scenario to the
contrary.
I tried with FDD then CD at the top of the list and tried with both
just disabled (without reordering first). I tried with the SATA
controller in ATA, AHCI and RAID/IRRT mode. I tried letting the
laptop autoboot to PXE with the order of the remaining items as PXE,
USB, HDD and PXE, HDD, USB. I tried manually booting PXE in these
same two orders plus USB, PXE, HDD. This is a total of 30 scenarios
that I tested.
I found that the HDD was assigned 0x80 only when in ATA or AHCI mode,
autobooting to PXE, with the FDD and CD boot enabled (4 scenarios).
--
-Gene
