on an old Dell with Slackware 11 and w/o CDROM

I inserted a pcmcia - ide card which seems to be recognized.
I can see the modules up: ide-cs, ds, pcmcia-core, ide-scsi.

But there is a command: /sbin/rescan-scsi-bus -l
which says: 0 devices found

How to proceed ? How to find the cdrom ( or pcmcia hd for that matter)

Thank you