Hi,
First let me quickly introduce myself, as I am new here. I'm Ben, french developer, retro-computers enthusiast. I spent a year building then studying an Apple-1 replica. And I'm now focused on the Altair 8800. I recently acquired one of Mike's wonderful clones.
Now let's talk about my issue; I have a terminal I wish I could use with it. It's a Matra Minitel 1b (old french tech, but basically, juste a dumb terminal but with a modem included). It has a tty input (din5) so I mounted a small rs232 to ttl on a din5 jack. I plugged it to a usb db9 rs232 cord, and setup teraterm for 4800baud, 7e1 bits. I can use my computer to type on the terminal, and the terminal to type on my computer. Great.
Then I changed the altair 1st connector to the same settings (88-sio 7e1 4800b), and used the front panel to enter the SIO echo test. Works perfectly. So far so good.
But then, I can't boot any floppy to show up to the terminal (tried the 3 pre-loaded floppies).
I noticed the same settings with teraterm do the same: nothing shows up.
I'm sure I'm missing something, and the operator's manual says the connection should use 2SIO settings but I'd like to understand why, and how it can be changed (if it can).
Thank you
Ben