Does `stty lcase` do what's needed?

My own setup isn't quite as "raw" because I implemented downcasing in firmware in my USB driver (https://github.com/hughpyle/ASR33/blob/master/hardware/README.md).  But I did write some rough notes that might be useful for you,

- customizing the getty (https://github.com/hughpyle/ASR33/blob/master/rpi/README.md)
- kernel patches for CRDLY, NLDLY and XCASE (https://github.com/hughpyle/ASR33/tree/master/rpi/kernel)


Hugh AC1MQ


On Thu, Dec 4, 2025 at 12:17 PM Aidan Riley <w9pog73@gmail.com> wrote:
Good afternoon all, 

I'm currently working on connecting a Model 33 Teletype to a modern Linux system. I already have input/output working through a USB serial adapter (PL2303, supports down to 75 baud). 

I'm attempting to connect it as a terminal. I'm using the following commands to set up and start the terminal connection:
stty -F /dev/ttyUSB0 iuclc
sudo agetty ttyUSB0 110,E2 tty33

I can successfully make the connection and connect to the user "TTY" that I set up. 

I know that the teletype is sending all uppercase characters, and my understanding is that using the iuclc setting with stty should automatically convert all characters to lowercase. However, this does not seem to be the case, as attempting a command like "LS" just returns that the command was not found (because "LS" is not a command, only "ls" is). 

Does anyone know what settings I may need to use to get this to work?

Thanks,
Aidan W9POG
______________________________________________________________
GreenKeys mailing list
Home: http://mailman.qth.net/mailman/listinfo/greenkeys
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:GreenKeys@mailman.qth.net

>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to hughpyle@gmail.com