Inside Macintosh: Devices /

Chapter 3 - SCSI Manager / SCSI Manager Reference

SCSI Manager Routines /

SCSISelect

You use SCSISelect function to select a SCSI device for a subsequent operation.

FUNCTION SCSISelect (targetID: Integer): OSErr;

targetID

The SCSI ID of the target device, with a value from 0 to 7.

DESCRIPTION

The SCSISelect function selects the SCSI device identified by the targetID value.

IMPORTANT

You must call the SCSIGet function before calling SCSISelect.

ASSEMBLY-LANGUAGE INFORMATION

The trap macro and routine selector for SCSISelect are

Trap macro	Selector
_SCSIDispatch	$0002

RESULT CODES

noErr	0	No error
scCommErr	2	Communications error, operation timeout
scArbNBErr	3	Bus busy, arbitration timeout
scSequenceErr	8	Attempted operation is out of sequence

SEE ALSO

See "SCSI Bus Phases," beginning on page 3-5, for a description of the selection phase.