[GreenKeys] Interface ASR33 to Linux serial port

[Michael Katzmann]

I'm not sure if this question is directed at me or Tom ... but FWIW I'm
using this ... https://deramp.com/tty_adapter.html
Michael

On Thu, Jan 4, 2024 at 5:44 PM David V. Corbin <david.corbin at dynconcepts.com>
wrote:

> What are you using to go from the pie to the current loop is a commercial
> converter or did you build one yourself.
>
> Get Outlook for iOS <https://aka.ms/o0ukef>
> ------------------------------
> *From:* greenkeys-bounces at mailman.qth.net <
> greenkeys-bounces at mailman.qth.net> on behalf of Michael Katzmann <
> vk2bea at gmail.com>
> *Sent:* Thursday, January 4, 2024 5:32:46 PM
> *To:* tlake at twcny.rr.com <tlake at twcny.rr.com>
> *Cc:* greenkeys at mailman.qth.net <greenkeys at mailman.qth.net>
> *Subject:* Re: [GreenKeys] Interface ASR33 to Linux serial port
>
> I've got a PiDP11 with a 33 attached.
> Usually the 33 is driven off the PDP11/70 SIMH emulator.
> I tried running the agetty command as you showed and it looks like it
> worked (except bash is confused for some reason)
> The OS is Raspbian (32 bit) but its pretty close to Ubuntu (both based on
> Debian). I favour Fedora myself!
>
> Michael
>
>
> [image: tty33.jpg]
>
> On Thu, Jan 4, 2024 at 3:52 PM Tom Lake <tlake at twcny.rr.com> wrote:
>
> I have an Ubuntu 23.10 system with agetty running on its eight serial
> ports. I can hook up most terminals to the ports and login to a bash shell.
>
> When I try to use a Teletype ASR 33, however, I get the login prompt and I
> answer enter the username. If I hit Return, nothing happens. If I hot Line
> Feed, the Password prompt is shown.
>
> After I enter the password (all uppercase) Incorrect password is shown.
>
>
>
> Since the prompts are displayed properly, I’m pretty sure the baud rate,
> BPS and stop bits are correct. What else can I check?
>
>
>
> I start agetty this way:
>
>
>
> agetty  -L -U ttyUSB0 110 tty
>
>
>
> The -L means it’s a dedicated line, not dial-in. The -U means the terminal
> is uppercase only and some upper/lowercase conversions should be made.
>
> The port is a USB to serial port (ttyUSB0), baud is 110.
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> --
>    |\      _,,,---,,_             Michael Katzmann
>    /,`.-'`'    -.  ;-;;,_         NV3Z / VK2BEA / G4NYV
>   |,4-  ) )-,_. ,\ (  `'-'
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>

-- 
   |\      _,,,---,,_             Michael Katzmann
   /,`.-'`'    -.  ;-;;,_         NV3Z / VK2BEA / G4NYV
  |,4-  ) )-,_. ,\ (  `'-'
 '---''(_/--'  `-'\_)
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