you need either ;
1- SCSI A500 sidecar (A590, GVP A500HD+) - SCSI*IDE adapter - IDE*CF adapter
2- IDE A500 sidecar (AlfaData and such) - IDE*CF adapter
alternatively, you can try ICD 68000 socket IDE addons. Or mrkl's 68k IDE adapter, but it requires kickstart 2.350 minimum (3.1 recommended).
