References describing tty line discipline wanted.

[Andrew Lue]

I'm trying to understand the source code for tty i/o using line
discipline.  Does anyone know of any articles or essays which describe
the logic flow and/or protocol involved with this?  If so, please respond
to my email account.  Thanks.

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  Andrew Lue                           andre at uts.amdahl.com

  DISCLAIMER:  The content of this article is an expression
               of me, not of Amdahl Corporation...
               ... which is my employer, of course.

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