Editing Macintosh IIsi Troubleshooting (section)

== Expansion Slot Issues ==

=== PDS Card Problems ===
* The IIsi PDS runs at 20 MHz; some SE/30 PDS cards designed for 16 MHz may not work
* Ensure card is fully seated in the slot
* Check for bent pins in the PDS connector

=== NuBus Adapter Issues ===
* The Apple IIsi NuBus Adapter converts PDS to NuBus
* Some NuBus cards may not fit due to case height restrictions (7" cards recommended)
* The adapter includes the 68882 FPU socket