On Nov 11, 2004, at 6:43 PM, Chris Tribo wrote:

> Um, without my machine up, I think it's control-alt-delete or
> control-alt-backspace, or control-alt-escape. C is continue or "go" in
> ddb.

http://www.netbsd.org/Ports/macppc/faq.html#keyboard-ddb

Of course, this only applies to ADB keyboards (and PowerBooks/iBooks).  
I've got no idea how it corresponds to USB keyboards (especially the 
ones with no power button).

   -- MW