CREATIVE 4X CD-ROM Drives GCD-R542B - Manual (Page 60)

Resolving Hardware Conflicts B-4
Changing IRQ Line
Four IRQ Lines are available for your IDE CD-ROM interface card:
10, 11 (factory default setting), 12 and 15. Refer to Table B-2 for the
standard IRQ line assigned to the different IDE port.
Refer to the section “Changing Base I/O Address” in this
chapter to identify the IDE Port you have specified.
Table B-2: IRQ Lines for the respective IDE Port.
IDE Port IRQ Lines
Secondary 15
Tertiary (Default) 11 (Default) or 12
Quarternary 10 or 11