How does vi know?

[Conor P. Cahill]

In article <1989Oct25.095349.22098 at gdt.bath.ac.uk>, exspes at gdr.bath.ac.uk (P E Smee) writes:
> Vi 'knows' whether you are on a screen terminal or a (paper or glass) tty,
> and comes up differently depending.  Question is, how does it know?  I've

Part of this is your $TERM definition and part of it is due to your baud 
setting in your tty settings.  if the baud rate is below a certain threshold
vi goes into a special mode so that it doesn't spend years redrawing a full
screen.


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