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  • RT-11 Terminal Woes

    From will...@gmail.com@will.senn@gmail.com to alt.sys.pdp11 on Thu Mar 3 10:53:24 2022
    From Newsgroup: alt.sys.pdp11

    I'm sure this is easy, but it's driving me batty trying to figure it out. I am booting RT-11, v5.1 and when booting in simh off the rl0, in my terminal window it shows:

    b rl0

    $[?1;2c
    Welcome to RT-11 Version 5.1.

    However, if I try it in xterm, it properly displays the screen without the ESC sequences being show. Also, if I run it in MacTerm (not to be confused with the os delivered Terminal) with the Base Term set to VT220, it is pretty, too.

    Is anybody able to get screen emulation to work properly in Mac's Terminal.app? I seem to remember having this problem a long time back, but I don't remember the solution.

    Thanks,

    Will
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  • From drb@drb@ihatespam.msu.edu (Dennis Boone) to alt.sys.pdp11 on Thu Mar 3 22:21:47 2022
    From Newsgroup: alt.sys.pdp11

    $[?1;2c

    This is the "I'm a VT100 with AVO" response to a "Send Device
    Attributes" request. The fact that it comes from the terminal side
    might explain why different terminal emulators behave differently.

    But I can't explain why one of them is causing this to be displayed,
    other than the likelihood of incorrect emulation.

    De
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  • From Jerry Weiss@jsw@ieee.org to alt.sys.pdp11 on Fri Mar 4 09:01:29 2022
    From Newsgroup: alt.sys.pdp11

    On Thursday, March 3, 2022 at 10:21:53 PM UTC-6, Dennis Boone wrote:
    $[?1;2c

    This is the "I'm a VT100 with AVO" response to a "Send Device
    Attributes" request. The fact that it comes from the terminal side
    might explain why different terminal emulators behave differently.

    But I can't explain why one of them is causing this to be displayed,
    other than the likelihood of incorrect emulation.

    De
    In command file that is run at boot time (STARTx.COM) there is a program generated or other interrogation of the terminal, with the response as Dennis mentions. If there is no program ready to accept this response, then will I suspect it will echo back to the terminal while the command file is executing. I've see this occasionally, but cannot reproduce it at the moment.
    If you are at the RT-11 prompt (.), KMON (the keyboard monitor) accepts this response silently and erases the screen.
    Jerry
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