Format of AMD Am53C974A PC-SCSI PCI configuration data:
Offset	Size	Description	)
 00h 64 BYTEs	header (see #00878)
		(vendor ID 1022h, device ID 2020h)
 10h	DWORD	I/O base address (see PORT xxxxh"Am53C974A")
 40h 16 BYTEs	scratch registers
		(used by AMD's PC-SCSI drivers as follows:
		    40h/41h  SCSI configuration register 0 (see #00926,#00927)
		    ...
		    4Eh/4Fh  SCSI configuration register 7)
SeeAlso: #00747