[GreenKeys] Jack Hart and i-Telex...

Tue Nov 14 04:21:52 EST 2017

> However, what I have not been able to find out, is how to get the 45.45
speed

Funny, the C-64 will do it! =p

But yes, that would be a sticking point for me and my lone M15. Time to
start checking datasheets for legacy UARTS...

Then again, there's no reason not to use the PC parallel port for this
function. We'd need to emulate a UART in software, which would be no
problem at all at such low speeds. And most any machine has a parallel
port, and if not, USB-to-parallel converters are very inexpensive on eBay,
around $2.50 US.

This may well be the best way to handle it, no need for COM cards, just a
simple custom cable to connect the parport to the loop converter should do
the job.

On Tue, Nov 14, 2017 at 3:15 AM, Nico de Jong <nico at farumdata.dk> wrote:

> UARTS of various flavors are not my speciality, io cards like LAVA support
> the speed.
> See http://lavalink.com/serial-cards/
> I used to use ComBro cards, but I dont think they are available in the US.
> Other cards will do too
> However, what I have not been able to find out, is how to get the 45.45
> speed
> /Nico
>
>
> It can be done.
>>>
>>
>> Bingo!
>>
>> I'd be interested in trying out your software, but none of my PCs have a
>> plug-in COM card.. just the typical multi-io chip which handles serial,
>> parallel, maybe the floppy controller, etc.
>>
>> Do you know which of the older UARTS support the slow speeds? Will the
>> 16550C do it, or 8250, or?
>>
>> Very cool, thanks in advance.
>>
>> On Tue, Nov 14, 2017 at 1:29 AM, Nico de Jong <nico at farumdata.dk> wrote:
>>
>> Hi Folks
>>>
>>> It can be done.
>>> I'm presently in the final stages of testing the i-telex part of my
>>> gentex
>>> simulator. This simulator uses a RS232 <> 40 mA (or 60 or 20) currentloop
>>> converter, and a connection to the i-Telex system.
>>> It uses a standard Windows PC, and runs on anything with a Pentium and a
>>> speed of 200 MHz or more.
>>> Have not tried on a 486, but there might be a speed issue.
>>> The only special thing, is an extra card with COM ports, because of the
>>> 50
>>> BPS speed. Most PC's dont support that 'speed'
>>>
>>> The simulator can be used as a single-user i-telex system, but it also
>>> has
>>> many other features, with some in development, e.g. listening in (and
>>> decoding) on encrypted messages.
>>> In my test system, I support 8 teletypes of various speeds and character
>>> sets, as everything, apart from the RS232-currentloop conversion is done
>>> in
>>> software (Delphi 6)
>>> Those interested are welcome to ask for an English manual (which still
>>> needs
>>> to be proof-read and spell-checked).
>>> So, here is the chance to put a 110 BPS machine on the i-telex network,
>>> without any bother
>>>
>>> 73, Nico OZ1BMC
>>>
>>> ----- Original Message -----
>>> From: "drlegendre ." <drlegendre at gmail.com>
>>> To: "Kenneth Gartland" <trnsrme at gmail.com>
>>> Cc: "greenkeys" <GreenKeys at mailman.qth.net>
>>> Sent: Tuesday, November 14, 2017 6:05 AM
>>> Subject: Re: [GreenKeys] Jack Hart and i-Telex...
>>>
>>>
>>> > i-Telex folks,
>>> >
>>> > I cannot understand why so much purpose-made hardware is required to >
>>> join
>>> > the network. I have to say the startup costs are something I could >
>>> never
>>> > justify in my current financial state, just to join such a small base
>>> > of
>>> > users.
>>> >
>>> > What am I missing? Why is it that this cannot be done with a generic PC
>>> > and
>>> > a standard loop converter such as is used to drive an M15? PC handles
>>> > the
>>> > IP networking, custom PC software talks with the TTY over RS-232 and CL
>>> > converter.
>>> >
>>> > How is this not possible?
>>> >
>>> > Best,
>>> > Bill
>>> >
>>> >
>>> > On Mon, Nov 13, 2017 at 5:39 PM, Kenneth Gartland <trnsrme at gmail.com>
>>> > wrote:
>>> >
>>> >> Hi all!
>>> >>
>>> >> Just sent Jack a "Congrats" message on his
>>> >> new i-Telex msg...
>>> >>
>>> >> There is a possibility, my message went out
>>> >> to everyone on the list, whereas I thot it was going
>>> >> directly to Jack!
>>> >>
>>> >> If so, sorry for clogging the airwaves!!
>>> >>
>>> >> Anyways, it great to have you on-board Jack,
>>> >> and hope to have a QSO soon!
>>> >>
>>> >> Cheers to all!
>>> >>
>>> >> Ken
>>> >> VE3-HMQ
>>> >> i-Telex 61663
>>> >>
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>>> >>
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>>> >>
>>> >
>>>
>>>
>>> ------------------------------------------------------------
>>> --------------------
>>>
>>>
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>>
>
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