What parts of "TeX" are architecture independent?

[llucius <llucius@millcomm.com>]

I finally bit the bullet and started work on the TeX packages to make 
them build on multiple architectures.  Well, since I don't much at all about 
TeX, I'm not sure what's platform specific.  I'm especially concerned 
about endianness.

As far as I can gather, the only files that aren't independent are "tfm" 
files.  Is that correct?

So, does anyone have any insight?

Thanks,

Leland

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