The directory structure containing the editor is:

Editor
   Actions
   Lib
   HostCode
      Characters
   Help
   Make

the existing 'm2path' files (in Editor, Editor.Actions & Editor.Lib) expect
the main Editor directory to be at the same level as 'PanosLib' (M2 PANOS
interface library) & 'Lib' (Acorn standard library).

The editor itself (program module Editor.Edit-mod) is split between Editor &
Editor.Actions, and may be built (when sitting in the Editor directory) by
the sequence:

m2dep -dirs actions (-all if necessary)
m2make Edit
.obey m2comp
m2l Edit

The editor version number is held in Editor.Version-mod, and has sufficient
components to allow it to be updated (by YOU) after all changes.

The editor hostcode source is the single BBC BASIC file HostCode.Ed6502-bas,
and when run (on a Beeb) will create the hostcode object Ed6502-bbc in the
directory in which it is run (normally HostCode). So to build the hostcode:

turn off 2nd processor, and enter BASIC
CH."_bas.Ed6502"

The hostcode version number (VersionNumber, notionally BCD) in the hostcode
source file should be updated after changes. Specifically it MUST be updated
after changes to the editor-hostcode interface. Changes must be reflected in
the constant HostCodeVersionNumber held in Editor.Interface-mod.

Editor.HostCode.document-txt is a documentation file containing a matrix
showing the OSRDCH values returned by the hostcode for all distinguished
keypress combinations.

The directory HostCode.Characters contains font files & BBC BASIC utilities
used to help create the editor character set (held in Editor.Characters-mod).
It is not needed to rebuild the editor.

The editor help file Editor.Help.EdHelp-dat is a special format text file,
which may be taken as is. The format is as follows:

Each editor built-in command may (but need not) have any number of help pages
in the file. Pages are identified by a header line of the form:
|||<case_exact_name>|||<page_number>
where <case_exact_name> is its name as assigned by its Actions.BuiltInAction
installation call (to be found in the Initialise procedure of the appropiate
module). Pages are terminated by a line starting:
|||
Page numbers are ascending cardinals (i.e. starting at 0). Thus a typical
multi-page help section might be:

|||ISearch|||0
Interactive search help 1st page (1 line long)
|||ISearch|||1
Interactive search help 2nd page (1 line long)
|||

Pages of a multi-page help text need not be consequetive and in order, but at
present (i.e. without any indexing scheme) will be found faster if they are.
Similarly, whilst not all commands need have help sections, an empty one (0
lines long) near the start of the file will result in a faster 'no detailed
help available' response.

A full editor release consists of the files:

Edit-rif
Ed6502-bbc
EdHelp-dat
EdInit-txt

The EdInit-txt file (corresponding to the release !PANOS EDIT$InitFile) is
there to support the undocumented programmable capability, and was initially
released as a "placeholder" in case this was ever utilized by the release
editor. As this is not the case, it would be best to omit the EDIT$InitFile
variable & EdInit-txt file completely, but if necessary the following is a
minimum no-effect file:

(
  (Define Init "Editor initialization" ()

    (PopBind 16_94) {Unbind self from f4}

  ) { End Init }

)

The Editor.Make directory contains command files for backing up the editor,
as follows:

make.dirs      Creates editor directory structure on adfs::4
make.back      Backs up editor to adfs::4
make.netdirs   Creates editor directory structure on nfs: (0.126 Ben)
make.netback   Backs up editor to nfs: (0.126 Ben)