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

[drlegendre .]

I think I've understood the reason to send the LTRS shift (not sure why
+two+ times, but whatever) as if the last shift is FIGS it leaves the
remote machine in FIGS. This would mean the remote typist might
accidentally send FIGS chars when they believe the machine is in LTRS shift.

Thus the courtesy, correct?

Also, sequential CR chars have no effect, other than to busy the line, once
the first CR makes it to the other machine - right? Multiple LFs would be
another matter, then..

As far as the char-per-line count, it never struck me that the receiving
machine wouldn't be able to sense the EOL limit and make a CR/LF (wrap the
text) when needed, like any 'smart' terminal should. So on the driver side,
I need to keep track of the number of (printable..) chars since the last
CR/LF - and send a CR/LF pair when the length exceeds the limit - do I have
that right?

Any further comments are welcome!

This is all great info, and very helpful. It's not all that easy to get all
this stuff figured out when I don't actually have an M15 to work with. But
I think that situation changes this weekend.. the M15 should be here on
Sat. or Sun. afternoon.

I'll post pics. ;-)

-Bill



On Fri, Sep 4, 2015 at 1:41 AM, Dave Horsfall <dave at horsfall.org> wrote:

> On Fri, 4 Sep 2015, Jeffrey D Angus wrote:
>
> > 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.
>
> ITYM letters shift...
>
> --
> Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will
> suffer."
>  Concerned about shark attacks?  Then don't go swimming in their food
> bowl...
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