Emax

I recently picked up an Emax SE HD keyboard with the intention of installing a slim floppy and PCD 50B, as the original internal Miniscribe hard drive was dead. I installed the PCD 50B, but I can't get it to correctly format a Compact Flash card. Every time it produces an "HD Format Error" or freezes on "Formatting HD..." indefinitely. In one case, the unit froze while it was saving a bank to the formatted disk.

Here is what I've checked thus far:

1. The machine boots normally from a floppy disk with the PCD 50B installed, and all functions appear to work.

2. When formatting, I tried a floppy disk with the Plus OS 4.0 (from E-Synthesist's Web site) and an original HD OS 1.1 that came with the unit.

3. I tried to format a SanDisk 512 MB card (connected via a PCMCIA adapter) and a SanDisk D2 Flashdisk 20 MB card, but neither worked.

4. I confirmed that the SCSI cable has data line 1 (red stripe) lined up with pin 1 on the PCD 50B.

5. The only jumper on the PCD 50B is for termination. I have all other jumpers removed. This means the device is set to SCSI ID 0 and "Write Protect" is off.

I'm out of ideas for what to try next. Any thoughts?