It is fixed in current drivers 

Forum: PCMCIA SCSI Host Adapter Issues
Re: adaptec1480 scsi & RH6.2 (matthias caraco)
Re: An aic7xxx driver update broke the APA1480 (David Hinds)
Re: SlimSCSI 1480 w/ Red Hat 6.2: I/O port conflict (Eric Smith)
Date: 2000, Jun 06
From: David Hinds <dhinds@pcmcia.sourceforge.org>

It was fixed in 3.1.14. -- Dave

to: "It is fixed in current drivers"