This chapter presents the PC 98 requirements and recommendations for the small computer system interface (SCSI). The use of SCSI in a PC 98 system is optional, but if SCSI is used, all components must comply with the requirements defined in this chapter.
SCSI is a flexible I/O bus that is used in the design of a wide variety of peripherals, including disk drives, CD-ROM drives, tape drives, scanners, and magneto-optical drives. The SCSI host adapter is the circuitry that serves as an interface between the system and one or more SCSI peripherals. A host adapter can be a card that plugs into the system’s expansion bus, such as a PCI card, or it can be designed directly into the system board.