Startup of MPC5500 (MPC5566)

I'm just bringing up our first MPC5566 board.  Everything is fine with
a debugger.  I watch the BAM find the RCHW, jumps to my code, and runs
fine.  (I just have a loop wiggling a GPIO--geesh.)  Without the
debugger, however, I get nothing.

Can someone point me in the right direction--what I am missing?

Thanks,
Steve