It looks to me as though you've moved the three handles from 
StandardFileStream to FileStream.
Could you perhaps give an example or two?

Since playing with MicroSqueak I've been staring with covetous eyes at 
Interpreter>>print: which is nothing more than printf(). I want to be 
able to print output not to a log file, but back to the terminal. 
MicroSqueak does that with #primitiveExitToDebugger (which uses 
#printCallStackFrom:).

I figure printf() is a great candidate for a simple FFI hack. I could 
create a method called #terminal: (instead of #log:).

I'm haunted by the idea of creating a command line Squeak interface. 
(FWIW the input would be passive: a drop folder. Create a process with 
FileDirectory to see if anything has been added to a directory every 
five seconds. It has? Stream it up to Compiler evaluate:.) Then a person 
could write a script in vi, cp it to the drop folder, and know it was 
working in a headless image by the output sent back to terminal by 
#terminal:.

Any examples to show how to use what you've just created would be 
greatly appreciated.

Chris