Apple 1230, 627 user manual Appendix C Assembling a SCSI Chain, About SCSI ID numbers

Models: 1230 627

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Appendix C

Appendix C

Assembling a SCSI Chain

This appendix shows you how to connect a chain of devices to your

Macintosh computer.

IMPORTANT If the scanner is the only SCSI device you plan to connect to your computer, do not use the instructions in this appendix. Instead, see Chapter 2, “Setting Up the Scanner,” where you’ll find the information you need.

About SCSI ID numbers

Your Macintosh has an external SCSI port that accepts a SCSI cable. You use this port to connect a device, such as the scanner.

Your computer may also have a second, internal SCSI connection. The computer’s internal hard disk drive is connected to this. If your computer came with a CD-ROM drive, the drive is also attached to the internal SCSI interface.

Each device has a unique ID number

To keep everything straight, the Macintosh requires that each SCSI device be assigned a SCSI ID number. This SCSI ID number is

mset by a hardware switch in each device

mtracked by the system software

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Page 167
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Apple 1230, 627 user manual Appendix C Assembling a SCSI Chain, About SCSI ID numbers, Each device has a unique ID number