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This file contains invisible Unicode characters
This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
..You must print this file in "W" mode with page length set to 54
..(the default) so that page numbers correspond with the Table of
..Contents and the Index. Use the "L" option for a left margin
..("L8" centers standard pitch on 8.5" wide paper), and the ""
..option to number pages.
ZDE
Z-System Display Editor
Version 1.0 10 Mar 89
ZDE and its documentation are copyright 1989 by Carson Wilson,
all rights reserved. They may not be circulated in any
incomplete or modified form without written permission of the
author. Any commercial use of ZDE, defined as any situation
where the duplicator receives revenue by duplicating or
distributing ZDE by itself or in conjunction with any hardware
or software product, is expressly prohibited unless authorized
in writing by Carson Wilson.
1. Introduction.
ZDE, the Z-System Display Editor, is a small, fast, powerful
text editor based Eric Meyer's famous Video Display Editor (VDE).
ZDE retains all features of VDE, but removes defects and supports
special ZCPR and ZSDOS features such as named directories,
register variables, automatic disk relog, and file datestamp
support. The install program has also been improved (see
ZDE10.NEW for a complete rundown of improvements). At the same
time, I have tried to be conscientious about the balance between
features and memory usage. If I added every new feature or
convenience that came to mind, we would soon have a luxurious
in-memory editor for 2 kilobyte files! Much of the following is
adapted with permission from Eric Meyer's VDE.DOC.
ZDE's native ASCII mode and definable macros make it an ideal
programmer's editor; its full formatting and printing features
also make it an efficient word processor. Written entirely in Z80
assembler, ZDE is F-A-S-T. There are no disk overlays, and all
editing is done in memory. As a result, finding a string near the
end of a 50K file takes WordStar 3.3 about 14 seconds (8MHz Z80);
ZDE does it in under a second. This is like moving through air
instead of molasses: you will find that you can do more of your
work on screen, and less on paper.
Among ZDE's features are:
Full-screen editing User area and named directory support
Block operations Wordwrap and reformat
File datestamp support Macro programs
Disk file operations Margins, tabs, spacing
Find and replace WordStar compatibility
Many print features Undeletion
Configurable options Support for all CP/M terminals
2. Installing ZDE.
ZDE works with Z80 CP/M 2.2 and 3.0 and compatible systems.
It is ideal for portable computers with limited disk space. There
are many user configurable options, and ZDE can be installed for
all CP/M terminals. If you are running ZCPR, ZSDOS or Z3PLUS, ZDE
offers features not available with less advanced system software,
but these system enhancements are not required.
To install ZDE, use the ZDENSTAL configuration program; see
the accompanying file ZDENSTAL.DOC. You should install ZDE for
your computer's terminal at the earliest convenience, since this
greatly enhances performance. There are many other installable
options; you will discover how you want everything set in the
course of using ZDE, so don't worry about going through all of it
at first. For ease of reference, portions of this manual
referring to installable options and settings are enclosed in
square brackets ("[" and "]").
3. Invoking ZDE.
ZDE is invoked from your system's command prompt using the
following syntax ("ufn" means "unambiguous file name"):
ZDE Begin working on a new file.
ZDE ufn Edit a new or already existing file.
ZDE dir:ufn Edit a new or existing file from another
directory.
ZDE ufn m Edit a file using mode "m."
ZDE ufn[m
"m" above can be either W, A, or N (see File Modes, below), and
"dir" can be either a drive, a user area, a drive followed by a
user area, or a ZCPR named directory. For example:
ZDE A4:MYFILE.TXT N Begin working on MYFILE.TXT at user
area 4, drive A, in non-document
mode.
The size of the file to be edited is limited by available
memory. This will vary for different systems, but normally the
maximum size will be between 45 and 55k. If a file is too large
to edit, you must break it up and edit the pieces separately.
Numerous CP/M utilities are available which will break up and
rejoin ASCII files.
4. ZDE's Command Set.
ZDE's commands consist of simple one- or two-key
combinations, easily found by the touch typist without
distraction. Most commands are the same as WordStar's. If you
have questions that this file can't answer, a WordStar manual may
be a useful reference. But ZDE is not a WordStar "clone"; there
are significant differences, including an extended set of
ESC-commands for functions such as macros (see below).
Virtually complete compatibility with the WordStar command
(sub)set can be achieved UNLESS the keys ^J, ^K, and ^L are used
as arrow keys (as on many CP/M computers). In this event ZDE
synonyms must be used: ESC- for the ^K- prefix; ESC-H for ^J; and
^\ for ^L (see ZDENSTAL.DOC for terminal installation).
4.1. Command Summary.
Below, the "^" character indicates use of the Ctrl key: ^K =
Ctrl+K. The ESC (^K), ^O, and ^Q prefixes require pressing two
keys in sequence: ^O C, for instance means press ^O, then C (or
^C). Any prefix may be canceled by typing ESC or Space.
4.1.1. Control Keys: Single Keystroke Commands.
^J (ESC H) = display Help menus.
CR = Carriage return (^M). Marks a paragraph end.
BS = Backspace (^H).
TAB = Hard Tab mode: insert tab (^I). Variable Tab mode: move
to next stop.
Arrow keys: WordStar: ^E up, ^X down, ^S left, ^D right.
Alternate: configurable, default ^K, ^J, ^H, ^L.
^F = move to start of next word right.
^A = move to start of next word left.
^R = scroll back one screen.
^C = scroll forward one screen.
^W = scroll back one line.
^Z = scroll forward one line.
^G = delete character to the right of the cursor.
DEL = delete character to the left (configurable).
^U = undelete a character.
^T = delete word to right of cursor.
^Y = delete current line.
^N = insert a carriage return (break line) at present
position.
^V = toggle INSERT mode on and off.
^^ = toggle case (upper/lower) of character at cursor.
^P = insert following control code in text.
^B = reformat current paragraph.
^L (^\) = repeat find/replace (repeats last ^QF or ^QA
command).
4.1.2. File and Block Commands: first hit ^K (or ESC), then the
key shown.
^K I = display file/memory Information message.
^K F = List files in disk directory.
^K E = Erase a disk file.
^K L = Load a brand new file to begin editing.
^K N = change the current file Name (affects Save, eXit).
^K S = Save the current file to disk, and continue editing.
^K D = Done. Save the file, then load a new one.
^K X = eXit: Save the file, then Quit to CP/M.
^K Q = Quit to CP/M, abandoning current file.
^K R = Read a disk file into text at cursor position.
^K P = Print the text (whole file or block).
^K B = mark the start of a Block.
^K K = mark the end of a block.
^K U = Unmark the block.
^K Y = Delete the marked block.
^K C = Copy the block text at present cursor position.
^K V = moVe the block text to the present cursor position.
^K W = Write the marked block to a disk file.
4.1.3. Escape and Macro Commands: first hit ESC, then the key
shown.
ESC arrows: Left/Right (including ^S/D) = shift screen
horizontally
by 32 columns.
Up/Down (including ^E/X) = shift screen
vertically
by 1/4 screen.
ESC TAB = move back to last tab stop.
ESC M = execute a Macro string of commands.
ESC # = store macro on numeric key for later recall.
ESC 0..9 = use stored key. (In macro mode: jump label.)
ESC !,=,~,+ = used in Macro programming (see below).
ESC ; = brief pause, during Macro execution only.
4.1.4. Quick Commands: first hit ^Q, then the key shown.
^Q Arrows: Left/Right (including ^S/D) = go to start or end
of line.
Up/Down (including ^E/X) = go to top or bottom
of screen.
^Q R = move to top of file.
^Q C = move to end of file.
^Q I = move to specified page or line number.
^Q B = move to marked block.
^Q Q = move to next line in queue (ZCPR only).
^Q Z = move to next place marker.
^Q F = find next occurrence of a string.
^Q A = find and replace a string.
^Q Y = delete from cursor to end of current line.
^Q DEL = delete from cursor to beginning of current line.
^Q T = delete until specified character (caution--powerful!).
^Q U = undelete a line.
4.1.5. Onscreen Commands: first hit ^O, then the key shown.
^O Arrow: Up (including ^E) = make current line top of
screen.
^O R = set right margin (column 1 turns off
wordwrap/formatting).
^O L = set left margin.
^O X = toggle Margin Release on/off.
^O C = center current line.
^O F = align current line flush with the right margin.
^O Q = toggle header on/off.
^O T = toggle ruler line on/off.
^O D = toggle display of hard CRs on/off.
^O A = toggle Auto Indent on/off.
^O S = toggle Double Spacing on/off.
^O H = toggle hyphenation on/off.
^O V = toggle tab mode Hard/Variable.
^O I = set variable tab stop.
^O N = clear variable tab stop.
^O P = set page length (0 turns off pagination).
^O W = toggle windowing on/off (see below).
^O Z = temporarily blank the entire screen.
5. Command Descriptions.
5.1. Auto-Indent Mode (^O-A).
Auto-Indent is useful for typing outlines, structured program
source code, and other text where the "left margin" varies.
Auto-Indent causes the RETURN key to act differently: If you are
entering new text, it will be indented to match the previous line.
If you are just moving through the file, the cursor advances past
any existing indentation.
5.2. Block Commands (^K-B, -K, -U, -R, -Y, -W, -C, -V, -P-B,
^Q-B).
A "block" of text is normally delimited by two markers
[default: ^@] which remain in memory until reset or deleted.
^K-B marks the beginning of the block; ^K-K marks its end.
Markers are inserted in the text. The two markers are identical;
the first one present is the start.
^K-U unmarks the block, removing any marker(s) set (block
markers can also be deleted individually as ordinary characters).
Markers are automatically removed as appropriate when ^K-B/-K are
used again.
^K-R reads in the contents of a disk file, inserting it as a
block after the current cursor position. You will be asked for
the name (and, optionally, mode) of the file. Other block
operation commands all require a Block to be marked:
^K-Y deletes the block (including markers).
^K-W writes the block text to a disk file; you will be asked
for the filename (and optional mode).
^K-V moves the Block text to the present cursor location,
deleting the original; ^K-C copies it and leaves the original.
Sometimes ZDE will run out of memory when moving blocks within a
large file. If this occurs, just write the block to a file,
delete it, and read it back in as: "^K-W, ^K-Y, ^K-R".
^K-P-B (^K-P with B option) prints the block text only.
The ^Q-B command, from wherever you are in the file, moves
the cursor to the Block start.
5.3. Cursor Movement (Arrow keys; ^F; ^A; ^Q-R, -C, -I).
ZDE supports three sets of Arrow keys, which function
interchangeably. The two built-in sets support the WordStar
"arrow key diamond" ^E, ^X, ^D, ^S, and the ANSI standard 3-byte
sequences (ESC-[-A, etc.). The third set is user-configurable,
and must be installed with ZDENSTAL. These keys move the cursor
up, down, right, and left respectively. Note: if you install ^J,
^K, and ^L as arrow keys, you must use ESC- commands for help,
file operations, and repeat find/replace, respectively.
Preceded by ^Q-, any arrow key (except ANSI) moves more
quickly: to the top or bottom of the screen, to the left or right
end of the line.
There are also two word movement commands: ^F moves right, to
the start of the next word; ^A moves left, to the start of the
previous (or current) word. Both have maximum ranges of 255
characters.
For quickly covering large distances, the commands ^Q-R and
^Q-C go all the way to the beginning and end of the file,
respectively, and ^Q-I goes to any specified page (or line, in
non-documents).
5.4. Deleting (^G, DEL, ^T, ^Y, ^Q-Y, -DEL, -T).
You can delete text one CHARACTER at a time: ^G deletes to
the right of the cursor, and DEL to the left. [If you have no DEL
key, you can install another equivalent.] Note that the ordinary
BS (^H) does not normally delete.
^T deletes an entire WORD to the right (up to 255 characters)
^Y deletes the entire current LINE. ^Q-Y deletes only the
part of the line to the right of the cursor; ^Q-DEL deletes the
part to the left.
^Q-T deletes UP TO a specified character. Example: "^Q-T."
deletes to the end of the sentence. Special case: "^Q-T-CR"
deletes to the next HARD CR, the end of the paragraph. This is a
powerful command, so use it with caution.
Accidentally deleted text can usually be recovered (see
Undelete, below).
5.5. Disk Operations (^K-F, -E).
^K-F gives an unsorted list of disk FILES: hit CR to list the
directory specified by the current file, or specify a drive, user,
or named directory (colon optional). If there is not enough room
to fit all the files on the screen, you will see "..." at the end
to indicate that there were still more. Press ESC or Space to
continue.
^K-E will ERASE a single disk file to provide more room on
the disk (no wildcards allowed).
5.6. File Commands (^K-N, -S, -X, -Q, -D, -L).
^K-N NAMES your work or changes the current file mode. You
can change the filename in the header before saving, and/or change
its mode to WordStar, ASCII, or Nondocument. To set the file
mode, introduce the mode character with the left square bracket,
e.g., "Name: MYFILE.WS [W".
^K-S SAVES your work: what's in memory is written to disk
under the file name in the header (you must have a file name; one
will be requested if necessary). If that file already existed, a
backup (.BAK) file may be preserved [configurable; see
installation guide]. If you haven't changed the file, ZDE prompts
you to confirm that you want to resave it anyway.
There are several different commands for finishing up:
^K-X saves your work and then EXITS to CP/M.
^K-Q just QUITS. If the file has been modified, ZDE asks if
you want to abandon the changes.
^K-D (DONE) saves your work, then loads a new file to edit.
^K-L quits the current file and LOADS a new one to begin
editing.
5.7. Find, Replace (^Q-F, -A, ^L, ^\).
^Q-F is the command to FIND a string. The search normally
proceeds from the cursor position forward, and is case
(upper/lower) insensitive. There are two options: "B" = search
backwards; "C" = case sensitive search. If used, the options
must be enclosed in slashes (eg, "/bc/") before the search string.
(If you want to search for a string beginning with a slash, use an
empty (//) option first.) In addition, a ^P-Z [this can be
reconfigured] functions as a wildcard matching any single
character. Other control codes, like ^M for newline, can be
included (with the ^P prefix where needed). Examples:
Find: /c/^MLABEL matches "LABEL" at start of line only;
Find: 4^Z^Z01 matches "42201", "47401", etc;
Find: wordstar matches "WORDSTAR", "WordStar" etc;
Find: ///88 matches "/88";
Find: /b/esc looks backwards for "Esc", "esc", etc.
^Q-A is the FIND/REPLACE command. It asks for a string to
find, and what to change it to (all options above apply to the
search string only). The cursor will be placed on each occurrence
of the string successively, starting at the cursor location. You
will see the prompt "Chg?" in the header. To replace the old
string with the new one, press "Y"; anything else skips to the
next. To change all further occurrences without being asked,
press "*". ESC cancels at any time. (Note: if ^Q-A is used in a
Macro, it will automatically assume "*" with no further input
required.)
^L (or ^\, if ^L is an arrow key) repeats the last ^Q-F or
^Q-A command. For ^Q-A, you will be asked whether you want to
replace the found string. For both, direction and case options
remain unchanged.
5.8. Header (^O-Q).
ZDE normally gives you a header, or status line, at the top
of the screen. However, if you like you can toggle the header
display on and off with the ^O-Q (QUIET) command. [The header may
also be suppressed by default.] This lets you see more file text.
It can also speed up operation on some slower terminals, as the
position doesn't have to be continually updated.
A typical header line looks something like:
------------------------------------------------------------------
B0/WORK:ZDE.DOC [A Pg 8 Ln 31 Cl 53 INS vt hy AI DS MR ^Q_
------------------------------------------------------------------
"B0/WORK:ZDE.DOC [A" = Current directory, filename, and mode.
"Pg 8, etc" = Current position in file by page, line, column.
For "N"ondocuments, there is no page number display. If
pagination (^O-P) is off, you will see "Pg 0" (document) or "OP"
(nondocument) here.
"INS" = Insert mode on (^V).
"vt" = Variable tabs on (^O-V).
"hy" = Hyphenation enabled. (^O-H) Doesn't display in "N"
mode.
"AI" = Auto indent mode on (^O-A).
"DS" = Double spacing (^O-S).
"MR" = Margins released (^O-X). Doesn't display in "N" mode.
"^Q_": Prefix keys (and some prompts) display here.
5.9. Information (^K-I).
^KI displays an Information message with:
- the ZDE version and date;
- whether (Y/N) the file has been changed since last saved;
- the current size of the file in bytes;
- the number of bytes of text memory used and free (1024
bytes = 1K).
You will note that the file uses about 20-25% less memory
than its actual length; this is due to ZDE's compression of text.
(Note: ZDE is limited to 16-bit arithmetic. In the unlikely event
that file size should exceed 64K it will be shown mod 64K; just
add 65536.)
Block moves and copying are limited by the amount of free
memory. Further, when there is less than 1K free, response time
can get very slow.
5.10. Insert Mode (^V).
^V toggles insertion on and off. If insert is OFF, any text
to the right of the cursor is overwritten as you type. If insert
is ON, what you type is inserted, and existing text moves to the
right.
5.11. Line Spacing (^O-S).
The ^O-S command toggles between single and double line
spacing. In double space mode, the following functions generate
double carriage returns: CR (^M), Insert CR (^N), Reform (^B),
Wordwrap. You can easily mix single and double spacing; the ^B
command can convert between the two. Note: if you prefer to keep
your actual file single spaced, you can still get a double-spaced
printout by using the "D" option of the ^K-P command (see
Printing).
5.12. Margins (^O-R, -L, -X, -C, -F).
^O-R sets the RIGHT margin, enabling wordwrap, reformatting,
and centering. A right margin of 1 disables all formatting
functions (same as in "N"ondocument mode). At the prompt
"Column:" enter the column number (1-255), or just hit CR for the
current cursor column. If the value entered conflicts with the
current left margin, ZDE sets the left margin to 1.
^O-L sets the LEFT margin in an identical fashion; of course,
the value must always be less than the current right margin,
meaning it's best to set the right margin first.
^O-X temporarily RELEASES the margins (resets them to 1),
allowing you to type outside them. Use ^O-X again to restore the
margins.
^O-C CENTERS the current line with respect to the margins, if
set. ^O-F sets the current line FLUSH right, if the right margin
is set.
5.13. Pagination (^O-P).
The ^O-P command sets the page length. Enter a value from 0
to 255, or just hit CR to restore the default value [normally 54].
When the value is nonzero, it determines the page and line
shown in the document header ("Pg xx Ln xx"), and page-oriented
Print functions (formfeeds, headers, start/stop print) are enabled.
When the value is zero, pagination is off. The header will
say "Pg 0 Ln xxxx", showing you the absolute line number in the
file. Also, printing occurs with no page breaks or formfeeds.
This can be useful for printing small things right after each
other on the same sheet; or, in conjunction with the "*" print
option, can be used to print out multiple copies of index cards,
labels, etc.
ZDE never sends a formfeed before printing; begin your file
with a ^P-L character if you need one. Otherwise, use of ^P-L is
not recommended in document files as it renders ZDE's page count
inaccurate.
5.14. Place Markers and Line Queue (^P-Z, ^Q-Z, ^Q-Q).
You can set any number of temporary PLACE MARKERS in the text
with ^P-Z (they will appear as ^Z). The ^Q-Z command moves the
cursor to the next place marker in the file, cycling back to the
top of the file if needed. Place markers are NOT saved to disk.
ZCPR users may also store a QUEUE of up to eight line numbers
in their user-defined messages (a set of sixteen bytes of
protected memory "available for user definition"). The ^Q-Q
command will then cycle through the queue of line numbers,
returning to the first location when it reaches a value of zero.
A value greater than the number of lines in the file takes the
cursor to the end of the file. The numbers are stored as two-byte
inverted hexadecimal words. This facility is intended as an
interface between other programs and ZDE for such purposes as
storing the locations of compiler errors, however ZCPR users may
also find it useful to POKE these locations directly before
invoking ZDE.
5.15. Printer Codes (^P).
Control codes for special effects in printing can be entered
in the text with the ^P prefix. Thus pressing ^P-^H (or ^P-H)
embeds a ^H, etc. Several standard codes are:
^H - backspace - overstrike previous character
^I - hard (ASCII) tab - printers respond variously to this
^L - formfeed (Not recommended unless pagination (^O-P)
disabled)
The Block marker, normally ^@, cannot be embedded, and ^Z is
reserved for use as a place marker. Control codes display on
screen as capital letters, highlighted if possible. ZDE assumes
they are not characters, so they are not counted when reformatting
text.
For greater convenience, you can also arrange to have a
single ^P-code produce an entire string of bytes for commonly used
printing effects. ZDE supports a subset of WordStar's printer
installation, seven definable codes: four toggles, four switches.
The Printer Installation in ZDENSTAL allows you to choose what
codes you want to use, and install the actual control sequences
your printer needs. The defaults are:
toggles: ^B, ^D, ^S, ^Y
switches: ^Q, ^W, ^E, ^R
In WordStar these toggles are Boldface, Doublestrike,
Underline, and Ribbon/Italic respectively, but you can make them
anything you like. "Toggles" are good for features like underline
and bold that are turned on and off. "Switches" are better for
multivalued parameters like character pitch.
Example: your printer uses ESC-U-01 (and 00) to turn
underlining on (and off). If you install these codes with
ZDENSTAL:
^S toggle on: (03)1B5501
...and off: (03)1B5500
then all you have to type in ZDE to get underlined text is:
^PSunderlined text^PS.
5.16. Printing (^K-P).
The ^K-P command PRINTS all or part of the file in memory.
You will be asked for a set of "Options:", at which point you may
enter zero or more of the following, in any order:
B prints only the currently marked BLOCK.
P PAUSES for your keystroke before each page (sheet
feed).
D DOUBLE SPACES all text to be printed.
Lnn sets the printer LEFT MARGIN to nn columns [the
default value can be set with ZDENSTAL].
^ FILTERS control characters ^X to text "^X".
*nn prints the job out nn TIMES (nn=1..255).
@nn begins printing AT the nn'th page.
=nn renumbers the pages beginning with nn.
#nn prints only (up to) a TOTAL of nn pages.
"..." uses the quoted string as a HEADER. The string,
followed immediately by the page number, will print
at the top right of each page near the margin (maxi-
mum length is 50 characters; an empty string, "",
gives numbered pages with no header text.)
The last four options (@,=,#,"") are NOT allowed if pagination is
disabled (^O-P), or if "B"lock print was chosen. Examples:
Options: L12P
- Print the file with a left margin of 12 columns, pausing
before each page for you to press a key (other than Esc).
Options: @6#2=14"Instructions, page "
- Print the sixth and seventh pages of the file, but numbered
14 and 15, with the header shown.
Options: BD^*2
- Print out the current marked Block twice, double spaced,
with control filtering.
In "W" mode, lines beginning with a "." will be regarded as
WordStar dot commands, and will neither print out nor affect the
page count (they have no other effect either).
You can abort printing at any time with ESC (this may take a
moment, or a few keystrokes, depending on your BIOS).
5.17. Ruler Line (^O-T).
To help you align text properly, ^O-T toggles display of a
"ruler line" above the text on and off.
In each column you will see one of several symbols: "[]"
designate the current margins (if set); "-" indicates areas within
the current margins, "." outside them. Also, tab stops are marked
by either "T" (Variable) or "I" (Hard). Examples:
("A" mode) [-----T-----T-----------T--------------]........
("N" mode) I.......I.......I.......I.......I.......I.......
5.18. Tabs (^I, ESC-TAB, ^O-V, ^O-I, ^O-N).
There are two Tab modes: Variable and Hard, and the ^O-V
command toggles between them. In Hard Tab mode the Tab key
produces an actual ^I (ASCII 09); whether this overwrites any
existing text depends on the Insert toggle. Hard Tabs display by
default at fixed intervals of 8 screen columns [this is
configurable to any multiple of 2].
In Variable Tab mode, the Tab key moves the cursor to the
next variable tab stop (you can always get a Hard Tab by typing
^P-I). If Insert is on, spaces are inserted up to the next tab
stop. Otherwise, existing text is skipped over, but spaces are
still added at the end of a line as needed. Up to eight tab stops
may be set with ^O-I and cleared with ^O-N; the defaults are in
columns 6, 11, 16, and 21 [these are configurable]. At the
prompt, enter the column number desired, or hit RETURN for the
cursor column.
The ^O-I command also accepts two multiple-set inputs: "@nn"
sets tab stops every "nn" columns, while "#n1,n2,..." sets tabs at
columns "n1,n2, ...". Both remove any pre-existing tabs, and
typing "@" or "#" alone simply clears all tabs.
The ESC-TAB command moves backward (left) to the previous
variable or hard tab stop.
5.19. Undelete (^U, ^Q-U).
The undelete functions may be used (repeatedly if necessary)
to recover a reasonable amount of text deleted either by
overtyping, or with any of ZDE's delete commands, IF the cursor
has not yet been moved away. ^U undeletes one character; ^Q-U
does a whole line.
Restrictions: undelete may not recover all of a Block delete
unless the cursor was in or near the block deleted, and it may
work imperfectly if DEL has been used several times in sequence.
Further use after all deleted text is recovered will produce
junk (usually duplicates of text above the cursor, which is
sometimes useful).
5.20. Upper/Lower Case (^^).
The ^^ (ctl-caret) command changes the case of the character
at the cursor, if it was a letter, and moves the cursor one
character to the right. Useful for capitalizing a string of
lowercase text, or vice versa.
5.21. Window and Screen (^W, ^Z, ESC-Arrows, ^O-Up, -W, -Z).
ZDE supports several functions to move and alter the display
screen.
The ^W and ^Z commands scroll the screen up and down a line
at a time, without moving the cursor (unless necessary).
Preceded by ESC, any arrow (except ANSI) moves the screen
rather than the cursor: the text as a whole shifts up/down 1/4
screen, or right/left 32 columns, while the cursor stays put (the
cursor must be past column 32 for horizontal shifts to work).
Preceded by ^O-, any UP arrow key (except ANSI) makes the
current text line the top of the screen.
The ^O-W command creates a WINDOW in the bottom half of the
screen, which retains a copy of the file text starting at the
current line, plus the current status and/or ruler line(s), if
any. Editing continues normally in the top half of the screen.
This is useful for comparing different sections of text within a
file, or even between different files. Typing ^O-W again removes
the Window. Note: Windowing is only supported for screens of 15
or more lines.
The ^O-Z command temporarily zaps (blanks) the entire screen;
good for avoiding CRT burn-in, or just protecting work from prying
eyes or fingers. Restore the screen by pressing ESC or SPACE.
Note: if Windowing was in effect, any text in the window will be
lost.
5.22. Wordwrap, Reformat (^B, ^O-D).
WORDWRAP is automatic in Document ("W" or "A") modes whenever
the right margin is set. Any text entered will be formatted to
the current margin settings as you type. The end of a paragraph
is marked by a "HARD CR", which occurs when you press the RETURN
key (this is a CR immediately following a character of text). In
contrast, when wordwrap occurs you get a "SOFT CR" (which is
actually a CR with a space before it). You can change a hard CR
into a soft one, or vice versa, by deleting or adding a space at
the end of the line. Hitting RETURN also hardens a soft CR. The
distinction between hard and soft CRs is only important when
reformatting.
^B REFORMATS from the line the cursor is on, to the end of
the paragraph, according to the current margin settings and line
spacing. ^B may be used not only to reshape a paragraph after
editing, but also to change its margins and line spacing.
Indentation can be tricky if you have a left margin set. If the
current line is indented relative to the next one, ZDE assumes
that amount as your paragraph indentation.
^O-D toggles DISPLAY OF HARD CRs. Hard CRs, otherwise
invisible, can be caused to display as a "<" character. This can
be useful; some may find it distracting, so it turns off.
6. Macros.
6.1. Macro (ESC-M).
A MACRO is a string of ZDE commands and text that, once
defined, can be repeated automatically. When you type ESC-M you
will be asked for the string, then a "Repeat count". Usually you
will simply type a number for the repeat count (0-9, or "*" for
"indefinitely"). You will see the results as the macro executes,
and you can abort it at any time by pressing ESC. If you are sure
you know what you're doing, you can speed up Macro execution by
specifying "Quiet" mode: press "Q" before the repeat count. Only
the header, if present, will be updated as the Macro runs.
Macros also stop any time an error occurs; the error message
will be visible, and can be cleared by pressing ESC. Many
commands (like Find or Reformat) are designed to generate errors
at the end of the file so that indefinite ("*") Macros containing
them halt there. You may need to abort other indefinite Macros
manually.
ZDE turns INSERT OFF before running a macro, so that the same
key sequence will always have the same effect. INSERT status is
restored when the macro terminates.
In order to include any input line editing characters (BS,
CR, etc.) in a macro, you must prefix them with ^P. (NOTE: To
make them easier to read and understand, Macro listings are given
here as they function, not as they are typed in. ^P prefixes as
needed are NOT shown. Keystrokes are separated by dashes or
commas for clarity, and "_" means a space or blank.) Here are some
sample Macros:
1. View a file by scrolling slowly through it:
ESC-;, ^C
This will pause, then scroll down. (Use a repeat count
of "*".)
2. Can you figure out what this one does?
^QR, ^QF, (, CR, ^G, ^KB, ^QF, ), CR, ^G, ^KK, ^QC, CR, ^KV
(Answer: .elif eht fo dne eht ta meht fo tsil a gnikam
elif a fo tuo sesehtnerap ni stnemmoc ekat lliw tI)
ZDE Macros are very powerful tools, particularly given their
programmability and storage on function keys.
6.2. Macro Key (ESC-#, ESC-0..9).
Up to 10 MACRO KEYS can be stored (0..9), by entering them
with the ESC-M command, then using ESC-# to save them. They can
then be recalled and used simply by typing ESC-number. Example:
typing ESC-#-0 will store the last Macro used in the ESC-0 command
so that it can be recalled and reused at any future time simply by
typing ESC-0.
Ordinarily, Macro Keys operate just like the original Macro,
asking for a "Repeat count" when executed. If you want to
suppress this prompt (resulting in a "function key" that executes
just once) you can type "N" (for No repeat) before storing the key
number. Example: ESC-#-N-0 makes ESC-0 a no-repeat macro key.
If you also don't need to see the Macro work, and want to make it
faster, you can make it QUIET as well by typing "Q" instead (for
Quiet) before the key number. Example: ESC-#-Q-0 stores ESC-0 as
a quiet no-repeat key sequence.
If the Macro (ESC-M) string is empty, using ESC-# will delete
a Macro Key. Using a defined Key makes it the last macro used, so
it can be stored again in another key if desired. Trying to use
an undefined Macro Key results in an error.
There are 500 bytes total available for all 10 keys, and a
128 byte limit for any one Key (ZDE's own input line will only
accept 65 bytes, but ZDENSTAL can handle up to the full 128.)
USAGE HINT: If you want to re-use a macro without having to
type it in again, use ESC-# to assign it to a key, then call it up
by number.
Besides simply storing Macros, here are some useful Macro
Keys:
1. Storing different sets of margins (e.g., for quotes).
For example,
^OL, 12, CR, ^OR, 66, CR
2. Typing any frequently repeated phrase; "ESC-6" is much
more convenient than "^PSWorld Wide Widgets Ltd. (N.A.)^PS".
3. Swap the two characters preceding the cursor:
^S, ^S, ^G, ^D, ^U, ^U, ^D, ^G
[ZDENSTAL allows you to install defaults for all ten Macro Keys.
Thus a copy of ZDE can be customized for any task, such as the
formatting requirements of specialized writing or programming
languages.]
6.3. Macro Programming (ESC-0..9, ESC-!,=,~,+,;).
ZDE has several commands which function only in a Macro
string, and give you control over the execution of a macro,
allowing true programming.
ESC-0..9 function as LABELS 0..9 when entered as part of a
Macro. They have no effect, but can be "jumped" to by other
commands.
ESC-! followed by 0..9 is a JUMP instruction, and causes
macro execution to resume with the command following the label
ESC-0..9. Example: ESC!2 jumps to label 2. As two special cases,
ESC-![ jumps to the beginning of the Macro, and ESC-!] jumps to
the end (aborts).
ESC-= and ESC-~, followed by a character and then a label
0..9 (or "[","]"), are CONDITIONAL JUMPS: they jump to the label
or the start or end of the macro IF the character at the cursor
position matches (ESC-=) or doesn't match (ESC-~) the character
specified. Example: ESC~^M2 jumps to ESC-2 if the current
character is NOT a CR.
ESC-= and ESC-~, followed by a character and then ">" or "<",
are SEARCH LOOPS. They will continue to move the cursor right
(">") or left ("<") AS LONG AS the character at the cursor matches
(ESC-=) or doesn't match (ESC-~) the specified character. Both
search loops terminate automatically at the beginning or end of
the file. Example: ESC=_> moves right as long as the current
character is a space.
ESC-+, followed by 0..9, CHAINS to another macro key,
allowing you to build macros strings longer than the storage limit
of any one key. It does not "call" the key; there is no
returning. Example: ESC+9 chains to Key 9.
ESC-; (semicolon) gives a brief pause, presumably so the user
can see what's happening on screen.
Macro programs are stored just like any other macro string
(usually with "N"o repeat count). If you program in an endless
loop, you will at some point have to abort with ESC. Don't make
macro programs "Q"uiet until you're sure they work.
Example: here is a good macro program (best stored as a Quiet
Key) to move the cursor to the start of the current sentence:
ESC~.1, ^S, ESC1, ESC~.<, ESC2, ^D, ESC=_2, ESC=^M2
You could write this out in programmer's pseudo-code as:
If not "." goto label1
Move left ;move left if already on period
label1: While not "." move Left ;move left to previous period
label2: Move right ;now move back right
If " " goto label2 ; as long as you see a space
If "^M" goto label2 ; or a Return
(all done)
7. General Information.
7.1. Disk Space.
ZDE isn't disk-bound; if you run out of disk space, just
insert another disk (always keep a blank FORMATTED disk around).
Alternatively, you can use the ESC-F and ESC-E commands to purge
unneeded files. [If you have small disks, you can also install
ZDE not to preserve BAK files.]
Let ZDE's filesize limits encourage you to break work up into
files of 50K or less; larger files make inefficient use of floppy
disks.
7.2. Error Messages.
Press ESC or Space to continue. "Error" alone means the
command used just won't work in this situation. (Example: a block
command was used with no block marked.) More specific errors are:
"Out of Memory" - the file, block, or key string won't fit in
RAM.
"Invalid Key" - an illegal command key sequence was pressed.
"I/O Error" - file not found, disk full, empty/invalid
drive, etc.
"Cannot Reformat" - word too long, or margins invalid.
"Not Found" - the object of a search was not found.
"Syntax Error" - a macro programming command was misused.
7.3. File Modes.
ZDE has three FILE MODES: "W"ordStar document, "A"SCII
document, and "N"on-document. The basic difference concerns the
format of disk files.
In "W" mode, ZDE reads and writes WordStar-compatible files.
ZDE can edit a WordStar document, except that any right
justification will be lost. WordStar can edit any ZDE "W" file in
Document mode.
In "A" or "N" mode, ZDE reads and writes text as standard
ASCII 7-bit characters, a universal format accepted by virtually
all software. The only difference between "A" and "N" modes lies
in the default settings on loading a new file. Typically "A" mode
is used for word processing, and "N" mode for programming and
other technical applications.
DEFAULTS FOR: Margins Tabs Hard CR disp.
------------ ------- ---- ------------
"A"SCII or "W"ordStar mode ACTIVE VARIABLE [ON]
"N"on-document DISABLED HARD OFF
The file mode option can be specified along with the filename
at any ZDE file function prompt, allowing you to mix WordStar and
ASCII disk files as needed (see Invoking ZDE, above). You can
also change the current mode with the ^K-N function by entering a
new mode (e.g., "[W") with or without a filename.
[ZDENSTAL allows you to select a default file mode, to be
used when no mode is specified (originally this is "A"). Further,
you can specify two filetype masks for automatic mode selection
(e.g., all "ASM" files as "N" mode) to override that default.]
NOTE ON ASCII FILES - The "A"SCII-document file format used
since VDE 2.50, to allow accurate formatting and WordStar
compatibility, distinguishes between HARD and SOFT CRs (see
Wordwrap, above). Consequently, if you edit an ASCII file created
by other software (including earlier versions of VDE), it may
appear to be full of hard CRs, making text impossible to reformat.
There are two easy ways to solve this problem: first, you can use
^Q-A to find "^M"s and selectively replace them with " ^M".
Alternatively, the following Macro (best stored as a Quiet macro
Key) does a good job of "softening up" paragraphs for reformatting:
^QS,^X,ESC=_],ESC=CR],^S,^V_^V,^D,ESC![
7.4. Hyphenation (^O-H).
ZDE can't introduce hyphens, but it does recognize them in
the text, treating them as a legitimate place to break a line, so
if you have a long word close to the margin, you can insert a
hyphen where you'd like the word to be broken.
Similarly, ZDE can't unhyphenate. If it is trying to
reformat and finds a hyphen at the end of a line, it will pause to
ask you what to do with it. You will see the prompt "Chg?" in the
header, and can:
Press "Y" to remove the hyphen and space, joining the word;
"N" to leave the hyphen, but still join the word;
"ESC" to leave both the hyphen and the space alone.
Typically you would choose "Y" for "soft" hyphens that you
introduced to break up a word ("intro-duction"); "N" for hard
hyphens that are part of a word ("vis-a-vis"); and "ESC" for
punctuation (dashes "--", etc.). After your choice, reformatting
will proceed automatically.
You can toggle hyphenation on and off with ^O-H. If off,
hyphens are not treated differently from any other text character.
[The ^O-H default can be changed with ZDENSTAL.]
7.5. Interruption.
If ZDE is interrupted by messages from other software (BIOS
error, resident utilities, etc.), it may lose control of the
screen. The best way to return it to normal is by blanking and
restoring the screen (^O-Z, ESC).
7.6. Prompts.
First, ZDE has several simple prompts requiring you to
confirm an action by typing "Y" or "N":
"Abandon changes?" - warns the file you want to Quit has
been changed.
"Unchanged; save anyway?" - reminds the file you want saved isn't
changed.
"Delete original?" - do you want to delete block copied
from 2nd file?
"Chg?" - do you want to change this instance of
a string?
Then, there are a few special purpose prompts:
"Repeat count:" - enter (optional "Q" and) repeat count
for Macro.
"Key number:" - enter (optional "N/Q" and) key number
for Key.
"Rdy" - press any key to print next page (ESC
quits).
Finally, there are a variety of prompts for either numeric or
string input, like "Column:" or "Find string:". You are expected
to type in a string (up to 65 characters). The following control
keys operate:
Correct mistake: BS (^H), ^S, or Del
Erase entire entry: ^X
Abort operation: ^U
Note that to get any of these codes, or a CR, into the string
itself, you must precede it with ^P (this includes ^P). Examples:
to find a line beginning with a "*" (find "^M,*") type
^Q-F, ^P-CR, *, CR.
Now to get this into a Macro with ESC-M, you would have to type
ESC-M, ^Q-F, ^P-P, ^P-CR, *, ^P-CR, CR.
7.7. WordStar Compatibility.
In most respects ZDE operates much like WordStar; one big
difference is the absence of a "No-File" menu. You are always in
edit mode; use ^K-L to select a new file to edit.
If the keys ^J, ^K, ^L are in use as CP/M arrow keys, you
must use ZDE's original command set to substitute for them as
follows:
Block prefix (^K-)... ESC-
Help menu (^J)....... ESC-H
Repeat find (^L)..... ^\
If these keys are NOT installed as arrow keys, they retain
their WordStar functions. Then, of course, ZDE lacks some
WordStar commands, and has some of its own. Aside from these,
there are the following differences in common commands:
COMMON USE WORDSTAR 4 ZDE ZDE NOTES
Hide block ^K-H ^K-U Actually unmarks block.
Erase disk file ^K-J ^K-E
Set Place Mark ^K-0..9 ^P-Z Not individually numbered.
Go to Place Mark ^Q-0..9 ^Q-P Cyclic.
COMMON COMMAND WORDSTAR 4 USE ZDE USE
^^ Soften hard CR Transpose upper/lowercase
^K-N Column block mode Rename current work
^O-D Display ^P codes Display hard CRs
^O-F Ruler from text Flush right
^O-P Preview mode Page length
^Q-U Repeat align Repeat undelete
Note that ZDE does not implement WordStar "dot commands" in text,
though in "W" mode it avoids printing them.
8. Disclaimer.
You use ZDE at your own risk. The author accepts no
liability for any damages resulting from its use or misuse.
Direct problem reports and suggestions to the author; include a
stamped return envelope for a reply if desired. Thanks to the
many users of ZDE whose feedback has led to improvements and bug
fixes in the past.
Carson Wilson Sysop: Antelope Freeway RAS
1359 W. Greenleaf 312-764-5162, Chicago
Chicago, IL 60626 24 hours, 3-12-2400 baud

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