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|  READ THIS FILE ALL THE WAY THROUGH BEFORE ATTEMPTING TO INSTALL FROTZ  |
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Because Frotz was originally written specifically for MS/PC DOS and then
ported to Unix machines.  As such, nothing about it was written with
36-bit systems in mind.  The initial job of porting to the PDP-10 mostly
involves taking the differences between 32-bitness and 36-bitness.  This
was sufficient for porting the dumb interface.  The ongoing job of
adding full screen handling will involve coming up with an old version
of curses or writing a cut-down version that supports only VT100/ANSI
and maybe VT52.

Currently the porting effort is focusing on TOPS20.

The porting effort used Mark Crispin's Panda TOPS20 distribution from
http://panda.trailing-edge.com/ and the KCC C compiler which is included.

To compile, do "make tops20".  This will copy the needed source files to
the "snavig/" directory and process them to fit TOPS20's limit of six
alphanumeric caps-insensitive characters on extern symbols and
filenames.  This requires the GNU version of sed.  So if you're on
macOS, *BSD, or something else non-GNU; install GNU sed before
proceeding.

The contents of this "snavig/" directory then needs to be uploaded to a
subdirectory on a PDP10.  Then while in the directory with the source,
the following command will then compile and link the code to produce an
executable:

cc -o dfrotz.exe *.c

There will be some complaints of unused parameters for some functions.
This is to be expected because the usual means of making the compiler to
keep quiet about these things don't work for KCC.  A considerable amount
of disk quota is required to complete the linking, but how much is not
entirely known.

If you get a complaint that you're out of disk space, look at the TOPS20
manuals for how to add yourself to the WHEEL and OPERATOR groups.  Then
you can set disk quotas yourself.  You'll want to do something like this:

  enable
  build <username>
    permanent infinity
    working infinity
  disable

Then for any subdirectories

  enable
  build <username.frotz>
    permanent infinity
    working infinity
  disable
  connect <username.frotz>

Now you're in the directory <username.frotz>.  To get source code into
the machine, FTP is probably your best bet.

  ftp ftp.foobar.com
    login ftp
    set no confirmation all
    cd <wherever the source is>
    get *
    quit
  reset ftp

Now compile.

  cc -o dfrotz.exe *.c


There are some irritating characteristics of TOPS20 that need to be
addressed.  So far, the only serious one deals with the terminal width.
TOPS20 will automatically insert a newline every N characters where N is
the terminal width setting.  You can see these by typing INFO TERM.  To
make TOPS20 not do this, you need to set the width to zero -- like this
"TERM WIDTH 0".  It's best to do these terminal setup things in your
LOGIN.CMD file, which is akin to a .profile or .bashrc file on a Unix
machine.  Add the following lines in the following order to LOGIN.CMD:

TERM VT100
TERM WIDTH 0

When setting TERM VT100, this implies a width of 80.  Therefore the
width needs to be set AFTER the terminal type in order for the width
setting to stick.