Greeting, As part of the xen code for PV-Drivers in Seabios I am trying to boot from a PV drive. The two ends are connected, and it should be working, but when I try to boot from the harddrive it fails. Inside the code I treat the cdrom as a drive, except I register it in seabios with the cdrom function, but also it fails to boot from cdrom with Error 003. This could mean that maybe I am adding the drives incorrectly, or that my read/write opertaion is wrong. Since the operation runs in 16bit how can I debug it to see what is being done? Thanks for the answers. Daniel -- +-=====---------------------------+ | +---------------------------------+ | This space intentionally blank for notetaking. | | | Daniel Castro, | | | | Consultant/Programmer.| | | | U Andes | +-------------------------------------+