How to get binary output for TTIX/TTOX

[Mike Katz]

Here is what works to allow me to output binary to TTOX (my Teletype ASR-33 connected to a USB to RS-232 converter connected to the Raspberry Pi as /dev/ttyUSB0):

sim> attach ttix line=0,connect=/dev/ttyUSB0;110-8N2
sim> set ttox 8b

Here is what I have learned:

• Attaching TTIX automatically creates TTOX (with TTIX at the first address [40 in this case] and TTOX at the second address [41 in this case]).
• TTOX is not separately attachable
• The 8B parameter needs to be set on TTOX.
• The 8B parameter cannot be set on TTIX.   In my opinion this is a bug, what happens if I want to input binary data (like reading a paper tape)?
• The documentation at https://simh.trailing-edge.com/pdf/pdp8_doc.pdf is not very clear on how to use TTIX/TTOX on PDP-8.  It states that TTIX and TTOX can be set to 8B but only TTOX can.  Is this a bug?

Which repository should i post a bug report/feature request to for the inability to set TTIX to 8B?

[Steve Tockey]

FWIW, my understanding is that the settings on TTIX are mirrored for TTOX. Setting TTOX to 8B should force TTIX to also be 8B. The physical KL8JA (M8655) board has those same settings at the board level, not separately for the input side vs. the output side.

-- steve