right thing." The simulator is configured to send lowercase input to
    the PDP-8 software running on it. Where we have the skill, will,
    need, and time for it, we have [patched][tty] some of the software
    we distribute that otherwise would not do the right thing with
    lowercase input to make it do so.

    This is *not* the option you want if you are a purist.









*   **upper** — This option tells the PDP-8 simulator to turn lowercase
    input into upper case. This is the behavior we used for all versions
    of the PiDP-8/I software up through v2017.04.04.  Essentially, it
    tells the software that you want it to behave as through you've got
    it connected to a Teletype Model 33 ASR.

    The advantage of this mode is that you will have no problems running
    PDP-8 software that does not understand lowercase ASCII text.

    The disadvantage is obvious: you won't be able to input lowercase


    ASCII text.  The SIMH option we enable in this mode is
    bidirectional, so that if you run a program that does emit lowercase
    ASCII text — such as Rick Murphy's version of Adventure — it will be
    uppercased, just like an ASR-33 would do.

    Another trap here is that the C programming language requires
    lowercase text, so you will get a warning if you leave the default
    option **--enable-os8-cc8** set. Pass **--disable-os8-cc8** when
    enabling **upper** mode.

*   **none** — This passes 7-bit ASCII text through to the software
    running on the simulator unchanged, and no patches are applied to
    the PDP-8 software we distribute.

    This is the option for historical purists. If you run into trouble
    getting the software to work as you expect when built in this mode,
    try enabling CAPS LOCK.

[sa]:  http://homepage.cs.uiowa.edu/~jones/pdp8/faqs/#charsets
[tty]: https://tangentsoft.com/pidp8i/wiki?name=OS/8+Console+TTY+Setup


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#### --no-lamp-simulator

    right thing." The simulator is configured to send lowercase input to
    the PDP-8 software running on it. Where we have the skill, will,
    need, and time for it, we have [patched][tty] some of the software
    we distribute that otherwise would not do the right thing with
    lowercase input to make it do so.

    This is *not* the option you want if you are a purist.

*   **pass** — This passes keyboard input through to the simulator
    unchanged, and no patches are applied to the PDP-8 software we
    distribute.

    This is the option for historical purists. If you run into trouble
    getting the software to work as you expect when built in this mode,
    try enabling CAPS LOCK.

*   **upper** — This option tells the PDP-8 simulator to turn lowercase
    input into upper case. This is the behavior we used for all versions
    of the PiDP-8/I software up through v2017.04.04.  Essentially, it
    tells the software that you want it to behave as through you've got
    it connected to an uppercase-only terminal like the Teletype Model 33 ASR.

    The advantage of this mode is that you will have no problems running
    PDP-8 software that does not understand lowercase ASCII text.

    The disadvantage is obvious: you won't be able to input lowercase
    ASCII text.

    The SIMH option we enable in this mode is bidirectional, so that if
    you run a program that does emit lowercase ASCII text — such as Rick
    Murphy's version of Adventure — it will be uppercased, just like an
    ASR-33 would do.

    Another trap here is that the C programming language requires
    lowercase text, so you will get a warning if you leave the default
    option **--enable-os8-cc8** set. Pass **--disable-os8-cc8** when
    enabling **upper** mode.









[sa]:  http://homepage.cs.uiowa.edu/~jones/pdp8/faqs/#charsets
[tty]: https://tangentsoft.com/pidp8i/wiki?name=OS/8+Console+TTY+Setup


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#### --no-lamp-simulator