[Coco] disable super extended basic

[Robert Hermanek]

Is it possible to "disable" super extended basic on a coco3?  If I 
understand the boot process correctly, the original unmodified basic and 
extended basic code is in ROM, and the boot process automatically 
executes the "super" extended basic code in the $E000+ range, and this 
code "patches" the originally loaded extended basic ROM image to 
integrate the super extended functionality.

Well ok.  But I was thinking the other day it would be nice to have 
basic, and extended basic, and HDB-DOS (in my case) all loaded up as per 
normal, but then detach super-extended basic and get it out of there... 
it would be nice to be able to build my own ML code that does clever 
things with the coco3 hardware, while leaving the basic interpreter 
intact.... and if I'm not using super extended basic commands, the $E000 
memory page would be a great place to put it.

-RobertH