[GreenKeys] [Bulk] Re: C-64 to drive Mdl. 15 TTY (and probably others..)

[Jeffrey D Angus]

On 9/3/2015 11:48 PM, drlegendre . wrote:
> But I would appreciate it if you elaborated on the following, as I'm
> almost sure I haven't included these functions in the software:
>
> "things like end of line counter and
> translating "Enter" to send CR CR LF LTRS. Or adding a LF on receive if it
> doesn't see one immediately before or after a CR. Better to throw away
> a valid character than miss a line feed."
Common courtesy when talking to a "real" TTY  machine is to send two
carriage returns, a line feed and a figures shift at the end of each line.
This accomplishes several things.
It makes sure the machine gets a carriage return, it gives the machine
time to settle down after the carriage return and it makes sure it's in
the right mode (letters) before it starts printing again.

A line counter function is there to keep you from sending more than
72-75 characters so that the machine at the other end doesn't start
pounding away at the end of the line.

And lastly, on receive, although this is entirely optional, if the other
person forgets to send a carriage return, you swap a carriage return for
another character. That's more a matters of esthetics if you plan on
printing a copy of the receiver buffer to paper.



-- 
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com

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