>My idea is to remove all the DO key checks and Debugger() calls from
>the serial drivers, and relocate those bits into lk201.c.  Is there
>any reason I shouldn't do this?  Does anyone have any better ideas?

Sounds okay to me.

If you're getting in there, i actually wonder about using a different
keystroke or key-chord sequence to enter the debugger, like F1 plus A
(suns) or even, shudder, Ctrl + compose + Del...