PiDP-8/I Software

    That having been said, people don't go to a ren fair and expect to
    experience the historical ubiquity of typhoid fever, so do not feel
    guilty if you choose to try this option.

[uvte]: https://tangentsoft.com/pidp8i/wiki?name=Using+VTEDIT

*   **--enable-os8-focal69** — Because the default installation includes
    U/W FOCAL, we have chosen to leave [FOCAL,1969][f69] out by default
    to save space on the O/S 8 system disk. You can give this option to
    install this implementation alongside U/W FOCAL, or you can couple
    this option with `--disable-os8-uwfocal` to reverse our choice of
    which FOCAL implementation to install by default.

    You should know that the reason we made this choice is that the
    version of FOCAL,1969 we are currently shipping is fairly minimal: we
    believe we are shipping the original DEC version of FOCAL,1969 plus a
    few carefully-selected overlays. There are many more overlays and
    patches available on the Internet for FOCAL,1969, but we have not had
    time to sort through these and make choices of which ones to ship or
    how to manage which ones get installed. Thus our choice: we want to
    provide the most functional version of FOCAL by default, and within
    the limitations of the time we have chosen to spend on this, that is
    U/W FOCAL today.

    (See our [U/W FOCAL manual supplement][suppd] for a list of
    differences between these versions of FOCAL, which implicitly
    explains why we chose it.)

    It is possible that we will eventually add enough patches and
    overlays to FOCAL,1969 that it will become more powerful than U/W
    FOCAL, so we might then choose to switch the defaults, but that is
    just speculation at the time of this writing.

[f69]:   https://tangentsoft.com/pidp8i/wiki?name=Running+FOCAL%2C1969
[suppd]: https://tangentsoft.com/pidp8i/doc/trunk/doc/uwfocal-manual-supp.md#diffs


#### --os8-minimal

If you set this flag, it sets all `--enable-os8-*` flags to false and
all `--disable-os8-*` flags to true.  If you give this along with any

set os8opts {
    advent      1  "Adventure"
    ba          1  "*.BA BASIC games and demos"
    cc8         1  "the native OS/8 CC8 compiler"
    chess       1  "the CHECKMO-II game of chess"
    crt         1  "CRT-style rubout processing"
    dcp         1  "the DCP disassembler"
    focal69     0  "FOCAL,1969"
    fortran-ii  1  "FORTRAN II"
    fortran-iv  1  "FORTRAN IV"
    init        1  "the OS/8 INIT message"
    k12         1  "12-bit Kermit"
    macrel      1  "the MACREL assembler"
    music       0  "*.MU files"
    uwfocal     1  "U/W FOCAL (only)"

    alt-serial-mod     => "use GPIO drive scheme suitable for James L-W's serial mod method"
    boot-tape-config:  => "Boot tape configuration: tc08, or td12k"
    boot-tape-version: => "OS/8 version for boot tape, either v3d or v3f"
    cc8-cross=1        => "do not build the cc8 cross-compiler on the host"
    debug-mode         => "create a debug build (default is release)"
    lowercase:         => "select how lowercase input is to be handled"
    no-lamp-simulator  => "use simple LED driver instead of incandescent lamp simulator"
    os8-focal=1        => "leave FOCAL,1969 and U/W FOCAL off the built OS/8 RK05 image"
    os8-minimal        => "set all --disable-os8-* options, giving minimal OS/8 bin disk"
    os8-src=1          => "do not build v3d-src.rk05 from OS/8 source tapes"
    savestate          => "save simulator state (regs, core, devices) on exit; restore on restart"
    serial-mod         => "use GPIO drive scheme suitable for Oscar Vermeulen's serial mod method"
    throttle:          => "override the throttle values in the boot scripts"
    usb-automount=1    => "do not automatically mount USB drives for SING_STEP + DF"
}