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

[drlegendre .]

Hey Jeff & All,

Thanks much for that, though I'm not quite sure I grok the whole of it -
particularly the bits about CRs and LFs..

Yes, I am fully aware of the nature of 5-level Baudot, and have written the
necessary software routines to translate between ASCII (well, PETSCII) and
Baudot - including the case shift (LTRS / FIGS) requirements. The software
is so far working fine - it's written in BASIC, and I'd be happy to provide
the code to anyone who might be interested in using / expanding it.

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."

Thanks so much, this would have been so much more of a struggle without the
help I've had from the list. But in the end, the C-64 is cheap and very
common - just about any classic comp nerd should have one. And the RS-232
interface is ultra-easy and cheap to build (though the 60mA / RS-232
converter is a bit more involved...)

Best,
Bill

On Thu, Sep 3, 2015 at 10:41 PM, Jeffrey D Angus <jdangus at att.net> wrote:

> On 9/3/2015 10:22 PM, drlegendre . wrote:
>
>> This should create a port running 5N2 @ 45.45 (5 data bits, no parity,
>> 2 stop bits at 45.45 baud). The "GET#" command is required to initialize
>> the port - do NOT omit, or everything will go screwy.
>>
> It does, but you have to remember to do the code conversion.
> The top 5 bits in ASCII are NOT the same as the 5 bits required in Baudot.
> And of course, the housekeeping. I.e. Remembering the state of being in
> LTRS or FIGS etc. And convenience 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.
>
> And as long as you have the programming to play with, adding features
> like normal/reverse. Or a canned message stack.
>
>
>
>
>
>
> --
> Jeff-1.0
> wa6fwi
> http://www.foxsmercantile.com
>
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