CREATIVE 4X CD-ROM Drives GCD-R542B - Manual (Page 58)

Resolving Hardware Conflicts B-2
Changing Base I/O Address
If I/O address conflicts occur between the IDE CD-ROM interface
card and other devices, you need to change the base I/O address of the
IDE CD-ROM interface card or that of the conflicting device.
Change the default base I/O address of the IDE CD-ROM
interface card only when another device absolutely requires the
I/O addresses assigned to the interface card. If you change the
I/O address of your card, you may also need to change the IRQ
line. Refer to the section “Changing IRQ Line”.
To change the interface card’s base I/O address:
1. Switch off your system and all peripheral devices.
2. Remove your system’s cover and IDE CD-ROM interface card.