Uncooperative RamFast

[Steven Hirsch <snhirsch@gmail.com>]

I'm running out of ideas and wonder if someone in the community can help. 
While testing my SCSI<-->CF card adapter, I added a drive at ID2 and 
partitioned it for test.  That works fine.  The problem is this: How on earth 
do I _remove_ that drive from the RamFast configuration?  The utility program 
provides no obvious way to remove the physical drive.  If I try to boot with 
it disconnected, I get the ** Unable to load ProDOS ** screen and a hung computer.

The manual claims I can hold down '0' at start to force it into the setup 
screen (or 1..7 to boot other volumes), but this simply does not work.  It 
jumps to the error screen and refuses to respond to any keystrokes.

What am I missing?

Steve