I'm looking to implement a web application which combines 2 Emscripten 
modules.

Think an IDE with a text editor, an Assembler (module 1) and an Emulator 
(module 2).
https://dl.dropboxusercontent.com/u/118061/neside/neside-flow.png

The general flow I'm hoping to achieve:

1. Content of a <textarea> is written as a text file to the FS (manually 
written JS).
2. Emscripten module 1 ("Assembler"):
  - reads the text file from the FS
  - writes a bin file to the FS.
3. Emscripten module 2 ("Emulator"):
  - reads the bin file from the FS and acts on it

I have successfully implemented both modules in isolation.
I can also use MODULARIZE=1 and EXPORT_NAME to include 2 modules in one 
page.

However in this setup, I am unable to access the filesystem and - much less 
- share it across modules.

I could use some help with the following:

1. How do I access "FS" when I use MODULARIZE=1? FS is not public and I 
can't #readFile or #writeFile.
2. Can the FS be shared across separate Emscripten modules? Or will I need 
to write some glue code to:
  - take data out of Assembler's FS
  - put the data into Emulator's FS

Thanks!
Łukasz

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