Scsi Bios

Some articles on scsi, scsi bios:

Option ROM - Standard IBM PC BIOS - SCSI
... For example, a SCSI controller card may hook INT 13 which is responsible for providing disk services ... any subsequent calls to INT 13H will be "caught" by the SCSI option ROM (or "SCSI BIOS"), allowing it to insert details about any disks that may exist on the SCSI bus ... intercepting the interrupt and altering the values returned, the SCSI BIOS can make all the disks on the SCSI bus visible to the system ...