Fujitsu 600C manual BSY Scsi SEL

			ARBITRATION phase
	Bus settle		Bus free
	delay
			delay
	BSY
SCSI	SEL
	DB
				Bus clear delay +
		Bus set delay	arbitration delay	bus settle delay
	BSY	∇
		Bus free
		delay
ID7	SEL
	DB(7)
			Bus clear delay
		Bus set delay
	BSY		∇
		Bus free
		delay
ID3	SEL
	DB(3)
			arbitration delay
	BSY	∇	Bus free
			delay
ID1	SEL
	DB(1)

ID7: Succeeds in ARBITRATION

ID3: Detects the SEL signals of other SCSI unit

ID1: Detects the SCSI ID with higher priority than itself

∇: The point at which the BUS FREE phase is detected by each SCSI unit

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