need help with dreamcast HDD IDE

[SWAT]

(12.06.2014 13:12)OzOnE писал(а):  Does that mean I need to switch to the stock BIOS before the "Init GD-ROM" message shows?

Yes, before this message.

(12.06.2014 13:12)OzOnE писал(а):  Has anything else changed in the code? Just a delay should have been enough?

Just move initialization of GD drive and iso fs from KOS kernel to the boot loader code after delay...
Hmm maybe this is problem of the syscalls...
I make new bios, remove GD drive initialization and add only BIOS check before IDE initialization. Try it.