Alternates to the ZCPR2 Resident Commands

Alternates to the ZCPR2 Resident Commands
The XDIR Command
Help File for XDIR
The ERASE Command
The RENAME Command
The PAGE Command
The PRINT Command
The PHELP Command
The PROTECT Command
The PATH Command
The WHEEL Command
The SAK Command
The COMMENT Command
:Alternates to the ZCPR2 Resident Commands

A� th� reade� ca� se� b� reviewin� th� hel� fil� name� �
Z2RES�� th� residen� command� o� ZCPR� ar� logica� extension� o� �
th� residen� command� o� th� CP/� 2.� CCP� Wit� th� ZCPR� Syste� �
o� Programs�� however�� come� � se� o� transien� program� whic� �
provid� th� sam� type� o� function� a� th� ZCPR�� residen� �
commands but with many more options and much more flexibility.

A� a� overview�� th� followin� tabl� compare� th� ZCPR� �
residen� command� an� thei� transien� alternates�� Th� residen� �
command� o� SAVE�� JUMP�� GET�� an� G� hav� n� alternate� b�� th� �
nature of their functions.

Resident Alternate Additional Alternate Functions
-------- --------- ------------------------------
DIR XDIR Sorts Display, Prints File Sizes, Negative
alias Selection, Disk Output, Printer Output,
XDIR3 File Scan Function, Named Directories

ERA ERASE File List, Named Directories, Inspect Mode,
Can Erase R/O Files, System File Protection

REN RENAME File List, Named Directories, Inspect Mode,
Wild Cards Permitted, Control Mode,
System File Protection

TYPE PAGE File List, Named Directories, Screen Wrap,
Speed Change

LIST PRINT File List, Named Directories, Headings,
Page Numbering, Time Stamp, Paging,
Skip to Specified Page

I� additio� t� th� transient� name� o� th� previou� table� �
si�� transient� no� relate� t� an� on� specifi� residen� comman� �
whic� kin� o� fal� int� th� categor� o� "specia� syste� transien� �
commands� are:

COMMENT -- "Block Comment" Routine

PATH -- Display and Set Command or File Search Paths

PHELP -- Special Version of PRINT which is used to
Print Help (HLP) Files

PROTECT -- Set Protection Codes and Tag Bits on Files

SA� -- Aler� Use� an� Optionall� Abor� � Multipl�
Command Line

WHEEL -- Enable and Disable Certain Resident Commands

These will also be discussed in this HELP File.

On� not� befor� proceeding� al� o� th� transient� discusse� �
her� whic� accep� bot� fil� name� an� option� a� argument� wil� �
no� accep� � fil� nam� beginnin� wit� � slash�� Thi� i� � trade-�
of� � ha� t� mak� ..�� wante� t� mak� i� eas� t� omi� th� fil� �
nam� (assumin� al� file� selected� an� jum� righ� t� th� options� �
T� b� consistent�� selecte� th� slas� (non� o� m� curren� file� �
begi� wit� � slas� an� � lik� i� a� a� optio� delimite� fro� m� �
experiences with DEC software).

Hence� a� � genera� rul� fo� al� transient� � create� t� ru� �
wit� ZCPR2�� i� � fil� nam� i� omitted� the� th� � characte� mus� �
procee� th� firs� option�� Additionally�� a� invali� optio� �
invoke� � built-i� Hel� facilit� withi� al� o� th� transients� �
and / is never an option character. So, we have:

command filename.typ o... <-- form with file spec
command /o... <-- form sans file spec
command // <-- always gives help

Anothe� ite� t� not� i� tha� man� transient� suppor� fil� �
list� wher� � singl� fil� nam� wa� give� before� I� thes� cases� �
th� use� ca� specif� � lis� o� fil� spec� separate� b� comma� i� �
the file name position:

command dir:f1.typ,dir:f2.typ,... o...

Als� i� man� cases�� th� DI� for� ma� b� prefixe� t� eac� �
fil� name�� Th� DI� for� ma� b� th� nam� o� � name� director� o� �
it may be a simple DU form.

:The XDIR Command

Th� XDIҠ Comman� (XDIR� program� i� a� extende� director� �
display utility. It has the general form of:

XDIR dir:filename.typ ooo...

where:

"dir:� i� � DI� prefix� i� ma� b� � name� directory�
like ROOT, a DU form, like A5, or omitted
"filename.typ" is an ambiguous file name reference,
and it may be omitted
"o" is an option character, and, if "filename.typ" is
omitted, the first option must be proceeded by
a slash

Valid options under XDIR are:

Aa -- Set File Attributes
AA = Select System and Non-System Files
AN = Select Non-System Files
AS = Select System Files
D -- Send Output to Disk File XDIR.DIR as well as
to the Console
Ff -- Enable a Disk-Based File Scanner Function
FL = Log Names to FNAMES.DIR
FP = Print Names Stored in FNAMES.DIR
FS = Scan Disk and Compare to FNAMES.DIR
G -- Toggle Grouping (by filename/type or type/name)
H -- Toggle Display (Horizontal/Vertical)
I -- Inspect Logged Files (for FL option only)
N -- Negate Selection (File NOT Matching Wildcard)
P -- Send Output to Printer as well as Console

Us� o� al� o� thes� option� i� rathe� involved�� an� XDIR� �
ha� � Hel� Fil� dedicate� t� it�� Th� nex� informatio� sectio� �
chains to that Help File.

::XDIR3
:The ERASE Command

Th� ERAS� comman� i� use� t� eras� files�� lik� ERA�� Ther� �
ar� man� majo� differences�� however�� Th� genera� for� o� th� �
ERASE Command is:

ERASE dir:f1.typ,dir:f2.typ,... o...

A� th� reade� ca� see�� fil� lis� i� permitte� a� wel� a� �
the DIR prefix. The file specs may be ambiguous.

�� majo� differenc� i� functiona� concep� betwee� ERASŠ an� �
ER�� i� tha� ER� alway� "sees� bot� Syste� an� Non-Syste� files� �
ERAS� onl� "sees� Non-Syste� file� an� mus� b� tol� explicitl� t� �
matc� Syste� file� a� well�� fee� tha� thi� afford� a� adde� �
degre� o� protectio� t� th� ZCPR�� environmen� overall�� an� �
command� lik� "ERAS� *.*� affec� onl� workin� file� an� no� th� �
System files which may be hidden in the directory.

The options recognized by ERASE are:

S -- Include System Files; if S is not present, then
ERASE does not "see" System Files

R -- Erase Read/Only Files without asking the user for
permission; if ERASE encounters a Read/Only
fil� whil� i� i� performin� it� functio�
without the R option enabled, it will ask
the user if he wants to erase the file before
it does so; with the R option, it simply goes
ahead and erases the file

I -- Inspect; ERASE can be instructed to display each
file to the user and ask permission before
it erases it; if the user gives permission
and ERASE discovers that the file is R/O with
the R option off, it will ask a second time
before going ahead

Examples:
ERASE A4:*.TXT Erase all Non-System files of type
TXT in directory A4; if a file is R/O,
ERASE will ask for permission before
proceeding

ERASE *.TXT,TXT:*.TXT RI
Erase all Non-System files of type TXT
in the current directory and in the
directory named TXT; if a file is R/O,
go ahead and erase it; allow the user to
see the name of the file and approve its
erasure before it is erased

ERASE SCRATCH: SR Erase all System and Non-System files
i� th� director� name� SCRATCH� i� �
file is R/O, erase it without asking;
this erases absolutely every file in
that directory
:The RENAME Command

Th� RENAM� comman� i� � brothe� t� th� RE� residen� command� �
Ther� ar� man� majo� differences� however:

. RENAM� allow� ambiguou� fil� name� t� th� used
. RENAM� supports an Inspect Mode, where the user is
presented with each name change and allowed to
approve of it before it is done
. RENAME supports a Control Mode, where the user is
presented with each file to be RENAMEd and allowed
to manually enter the new name or not rename the
file
. RENAME accepts a list of files
. RENAME does not "see" System files unless told to
. RENAME can rename Read/Only files
. RENAME sets the attibutes (R/O and SYS) of the
new file names to be the same as those on the
old file names
. RENAME supports Named Directories

The RENAME command is of the general form:

RENAME dir:f1.typ,dir:f2.typ,... o...

The options to RENAME are:

S -- Include System Files
I -- Allow user to Inspect the file before performing
the rename
C -- (Control Mode) Allow the user to manually name
each of the selected files or to skip it

I� � ne� fil� nam� i� th� sam� a� a� existin� file� th� use� �
wil� b� aske� i� h� wishe� t� delet� th� existin� fil� i� orde� �
for the rename function to be performed.

Examples:
RENAME A4:MYFILE.TXT=HISFILE.TXT
Rename HISFILE.TXT in A4 to MYFILE.TXT

RENAME A4:*.MAC=*.ASM,*.TXT=*.TEX IS
Rename all files of type ASM in A4 to type MAC; also
rename all files of type TEX in the current directory
to type TXT; include System files and Inspect (approve)
each file before the rename is done

RENAME TXT: C
Rename all Non-System files in directory TXT; the user
is presented with the name of the file and manually
enters a new name for it

RENAME 1:*.TXT CS
Rename all Non-System and System files in User 1 of the
current disk whose file type is TXT and allow the user
to manually enter each new name

RENAME S*.TXT=*.TXT
Rename all Non-System files in the current directory
whos� fil� typ� i� TX� s� tha� th� firs� lette� o�
their names is an S and the rest of the letters are
unchanged

:The PAGE Command

Th� PAG� comman� i� use� t� lis� file� o� th� console�� I� �
offer� � fe� advantage� ove� TYP� i� tha� PAG� know� th� widt� o� �
th� scree� an� handle� wraparoun� (whic� i� � bi� complain� wit� �
TYPŠ whe� tryin� t� pag� throug� "wide�� listing� lik� tha� �
produce� b� th� assemblers)�� PAG� als� accept� � fil� lis� an� �
supports named directories.

PAGE is invoked by a command line of the following form:

PAGE dir:f1.typ,dir:f2.typ,... o...

wher� "dir:fn.typ� i� a� ambiguou� fil� spe� (wil� card� ma�� b� �
used�� wit� � DI� prefi� (name� directorie� o� D� for� allowed� �
and "o" is one or more of the following options:

0-9 Set Character Print Speed (0=fastest=default)

I Inspect Files
The user is allowed to approve each file to
b� printe� befor� th� printin� begins�
default is NO Inspection

L Toggle Line Numbering
Each line may be numbered; default is NO Line
Numbers

P Toggle Screen Paging
Tur� of� th� facilit� o� pausin� onc� �
screen is filled; default is Paging Enabled

Snn Skip to Specified Page
Skip to indicated page (size of page on
printer) before beginning; default is NO Skip

Th� Spee� optio� o� th� PAG� comman� shoul� b� discusse� i� �
somewha� mor� detail�� Whil� � fil� i� bein� page� t� th� user� �
th� use� ca� strik� on� o� th� digit� t� var� th� spee� o� th� �
outpu� dynamically� � i� th� fastest� � i� th� slowest� I� thi� �
way�� th� use� ca� easil� sca� � fil� b� runnin� PAG� wit� th� � �
optio� (s� i� doe� no� sto� whe� th� scree� i� filled�� an� �
strikin� � digi� fro� tim� t� tim� t� spee� u� ove� section� h� �
isn't interested in and slow down for sections he is.

Whil� th� outpu� i� bein� directe� t� th� screen�� PAG� �
support� th� followin� single-characte� command� t� chang� th� �
output display in one way or another:

0 to 9 - change speed (0=slowest, 9=fastest)

P or p - toggle pause when screen fills
(the user can dynamically turn on and off
the ability to delay when a screen fills)

^X - skip to next file

^C - abort to operating system

^S - pause output; any key will resume, and all
of these commands (except ^S) will work

PAG� i� constantl� acceptin� use� input�� an� thes� command� �
ar� i� effec� al� o� th� time�� Thi� include� th� tim� whe� PAG� �
ha� pause� afte� fillin� th� scree� (it� default)�� s� th� use� �
ca� tur� of� pagin� o� var� th� spee� a� thi� time�� i� s� �
desired� An� othe� characte� wil� b� ignored.

:The PRINT Command

Th� PRINԠ comman� i� use� t� prin� � fil� o� th� LST� �
device�� lik� LIS� does�� bu� offer� man� mor� options�� I� wil� �
prin� � heading�� pag� th� file�� numbe� th� pages�� numbe� th� �
lines�� plac� � date/tim� stam� o� th� output�� pu� th� fil� nam� �
o� th� output� an� others.

The PRINT command is of the following form:

PRINT dir:f1.typ,dir:f2.typ,... o...

wher� "dir:fn.typ�� i� a� ambigou� fil� nam� wit� � DIҠ prefi� �
(supportin� th� D� for� o� � name� directory� an� "o� i� on� o� �
mor� o� th� following:

E - Exact Print (Expand Tabs, Form Feed, No Line or
Page Numbers, No Heading)

F - Toggle default of file name display on page header
(defaul� i� ON� so � turn� of� name display)

H<delim>text<delim> - Define Heading text to appear
at the top of each page

I - Inspect Files (allow user to select files before
printing begins)

L - Enable numbering of each line

M - Disable Multiple Run Flag
(if multiple run is ON, then no "Set Top of Form"
message appears for each file and PRINT moves
from one file to another unattended); default is
with Multiple Run ON

N - Disable numbering of each page

Sn - Start printing on page n

T - Toggle date/time stamp in the header of each page
(a TIME subroutine must be assembled into PRINT
to enable the date/time stamp feature)

Th� specifi� feature� o� th� printe� ar� se� b�� th� �
installe� wit� GENINS�� Suc� feature� includ� th� numbe� o� �
physica� line� o� � page�� th� numbe� o� line� o� tex� o� � page� �
an� th� widt� o� � lin� i� characters.

Th� date/tim� stam� featur� i� ver�� machine-dependent�� an� �
PRIN� ha� t� b� reassemble� t� suppor� it.

While PRINT is running, the following commands work:

^C Abort and return to operating system

^X Skip to top of next page and skip to next file

:The PHELP Command

Th� PHEL� comman� i� � specia� versio� o� PRIN� designe� t� �
prin� Hel� (HLP� files�� PHEL� know� abou� th� structur� o� Hel� �
Files�� an� i� use� thi� informatio� t� prin� the� i� � preferre� �
format� I� i� i� dealin� wit� a� indexe� Hel� File� PHEL� print� �
th� inde� o� th� firs� pag� an� th� bod� startin� o� th� secon� �
page�� PHELР
alway� skip� t� th� to� o� � ne�� pag� whe� i� �
encounter� a� informatio� section�� I� output� � ne� lin� whe� � �
for� fee� characte� (use� b� HEL� t� brea� scree� displays)�� a� �
opposed to causing a page eject.�

The PHELP command is of the following form:

PHELP dir:f1.typ,dir:f2.typ,... o...

wher� "dir:fn.typ�� i� a� ambigou� fil� nam� wit� � DIҠ prefi� �
(supportin� th� D� for� o� � name� directory� an� "o� i� on� o� �
mor� o� th� following:

H<delim>text<delim> - Define Heading text to appear
at the top of each page

I - Inspect Files (allow user to select files before
printing begins)

L - Enable numbering of each line

Sn - Start printing on page n

T - Toggle date/time stamp in the header of each page
(a TIME subroutine must be assembled into PRINT
to enable the date/time stamp feature)

A� wit� PRINT�� ^� abort� th� printou� an� ^� skip� t� th� �
next file after issuing a form feed.

:The PROTECT Command

Th� PROTEC� comman� replace� th� attribut� se� capabilitie� �
o� th� STA� transien� an� add� mor� flexibility�� PROTECԠ i� �
designe� t� allo� th� use� t� specif� th� attribute� (Read/Only� �
System�� an� Archive� an� ta� bit� (th� Mos� Significan� Bit� o� �
the eight characters in a file name) of a file or set of files.

The PROTECT command is of the following form:

PROTECT dir:f1.typ,dir:f2.typ,... o...

A� th� reade� ca� see�� fil� lis� i� permitte� a� wel� a� �
name� directories�� Th� fil� spec� ma� b� ambiguous� Option� t� �
the PROTECT Command are:

PROTECT always "sees" both System and Non-System files.

I -- Inspect C -- Control

R, S, A -- Turn on Attributes Read/Only, System, and
Archive

n, 1 <= n <= 8 -- Set Tag Bits

Inspec� Mod� allow� th� use� t� loo� a� eac� fil� befor� i� �
i� "protected�� an� permi� o� disallo�� th� functio� t� b� �
performed on a case-by-case basis.

Contro� Mode� a� wit� th� RENAM� command� allow� th� use� t� �
se� th� nam� o� eac� fil� selecte� an� manuall�� se� it� �
attribute� an� ta� bits� I� respons� t� th� Contro� Mod� prompt� �
th� use� ca� typ� i� an� combinatio� o� th� letter� A�� R� S� an� �
the digits 1-8.

Examples:
PROTECT A4:*.COM,ROOT:*.COM RSI
Set the Attributes of all COM files in directories A4
and ROOT to Read/Only and System. Turn off the Archive
attribute and all tag bits. Allow the user to inspect
each file before the operation is performed.

PROTECT ROOT:*.TXT
Clear all attributes and all tag bits of all files of
type TXT in the directory named ROOT

PROTECT A: C
Allow the user to manually set all attributes and tag
bits of all files on Disk A in the current user

:The PATH Command

Th� PATȠ Comman� i� use� t� dynamicall� chang� � memory-�
base� fil� searc� pat� o� th� ZCPR� comman� searc� path�� Wit� �
PATH�� th� use� ca� defin� � ne� pat� t� b� followe� o� h� ca� �
view what the current path is.

Th� PAT� comman� i� installe� b� GENINS�� and�� durin� th� �
installatio� process�� GENIN� tell� PAT� th� beginnin� addres� o� �
th� pat� i� i� t� wor� with� PAT� ma� b� installe� severa� time� �
b� GENINS�� give� differen� pat� addresses�� an� the� save� unde� �
different names to support each path the ZCPR2 System uses.

Th� PATȠ comman� deal� wit� pat� expressions�� pat� �
expressio� i� � sequenc� o� director�� names� whic� ca� b� �
expresse� a� "ambiguous� D� forms�� absolut� D� forms�� o� Name� �
Directory forms.

A� absolut� D� for� indicate� jus� � dis� lette� (curren� �
use� i� assumed)�� jus� � use� numbe� (curren� dis� i� assumed)� �
o� bot� � dis� lette� an� � use� number�� A� "ambiguous� D� for� �
i� on� i� whic� th� dis� lette� o� use� numbe� o� bot� i� �
replace� wit� � "$� character� meanin� "curren� disk� o� "curren� �
user"�� Name� Director� form� o� course� i� simpl� th� nam� o� �
a directory.

T� illustrate�� let'� sa� tha� yo� ar� logge� int� B1�� Th� �
path
$0 A$ A0 ROOT

represents the sequence

B0 to A1 to A0 to ROOT

Th� PAT� Command� then� ma� b� invoke� b� thes� forms:

PATH // <-- Print Help
PATH <-- Display Path
PATH path-expression <-- Set Path

Actua� scree� display� illustratin� th� us� o� PAT� follow� �
Comments are denoted at the size by being prefixed with "<<".

B7>path // << Print Help
PATH Version 1.0
PATH allows the user to display his current path
and set a new path. It is invoked by one of the forms:

PATH <-- Display Path
PATH path-expression <-- Set Path
PATH // <-- Print Help

B7>path << Print Current Path
PATH Version 1.0
Current Path in Symbolic Form --
A$: --> A 15:
Current Path in Absolute Form --
A 7: --> A 15:
Current Path in Named Directory Form --
R-WS: --> ROOT:

B7>path $0 a$ base root: << Set a Path
PATH Version 1.0 << Note: a named dir may have a : suffix
Current Path in Symbolic Form --
$ 0: --> A$: --> A 0: --> A 15:
Current Path in Absolute Form --
B 0: --> A 7: --> A 0: --> A 15:
Current Path in Named Directory Form --
DEV-BASE: --> R-WS: --> BASE: --> ROOT:

B7>path 0 base root help << Set a Path with an Error in It
PATH Version 1.0

Invalid Path Expression Element -- Error Flagged at:
-->0 BASE ROOT HELP
This may be an invalid DU: form (disk or user out of range)
or an undefined named direcory.

Aborting to CP/M

B7>path a$ << I kept ROOT in the path before
PATH Version 1.0 << This is where my commands are
Current Path in Symbolic Form --
A$:
Current Path in Absolute Form --
A 7:
Current Path in Named Directory Form --
R-WS:
B7>path << Path Can't be found without ROOT being
PATH? << in the path expression
B7>a15:path a$ root << ... UNLESS the DU: prefix is used
PATH Version 1.0 << (DU: can be disabled by the ZCPR2 installer)
Current Path in Symbolic Form --
A$: --> A 15:
Current Path in Absolute Form --
A 7: --> A 15:
Current Path in Named Directory Form --
R-WS: --> ROOT:

B7>

No�� w� ar� bac� t� ou� origina� path�� Not� tha� b� �
disablin� th� D� form�� lo� o� securit� i� adde� t� th� system� �
Command� ca� onl� com� fro� th� curren� path� an� C� MUS� b� use� �
t� lo� int� � directory�� Adde� t� this�� o� course�� i� th� �
abilit�� t� hid� Syste� Directorie� fro� vie� b� PW� an� forcin� �
th� use� t� provid� � passwor� i� orde� t� ente� � Syste� �
Directory.

:The WHEEL Command

Th� WHEE̠ comman� i� use� t� enabl� an� disabl� certai� �
selecte� (a� installatio� time� ZCPR� residen� commands� � WHEE� �
optio� ca� b� specifie� whe� ZCPR� i� installe� o� � targe� �
system� I� th� WHEE� optio� i� enable� fo� � particula� command� �
tha� comman� wil� wor� onl� i� � Whee� Byte� locate� somewher� i� �
memory� i� set� Th� comman� wil� ech� a� a� erro� messag� i� th� �
Whee� Byt� i� no� set.

Th� WHEE� comman� i� use� t� se� an� rese� th� Whee� Byte� �
It supports the following forms:

WHEEL or WHEEL // <-- Print Help
WHEE� passwor� SE� <-- Se� Whee� Byt� (Enabl� Cmd)
WHEEL password <-- Set Wheel Byte
WHEE� passwor� RESE� <-- Reset� o� Clear� Whee� Byte

Th� WHEE� concep� ca� b� extende� int� transien� command� a� �
well�� Thi� i� no� don� wit� th� transient� supplie� wit� ZCPR2� �
however. The WHEEL command is installed by GENINS.

:The SAK Command

SAˠ (Strik� An� Key� wa� designe� t� provid� som� simpl� �
utilit� functions�� on� o� whic� i� associate� wit� th� Multipl� �
Comman� Lin� featur� o� ZCPR2� I� wa� designe� fo� th� followin� �
purposes:

1. to allow the user to program a wait in a multiple
command line until he instructs the system to
continue

2. to allow the user to abort a multiple command line

3. to allow the user to program an interruptable delay
in the execution of a multiple command line

4. to provide a simple alarm for the user

The SAK command line is:

SAK o...

where "o" is zero or more of the following options:

A -- DO NOT Allow the User to Abort the MCL
B -- Ring Bell
Pnn -- Pause nn seconds and continue if no response

Wit� N� options�� SA� wait� fo� use� input�� an� i� th� use� �
strike� � ^C�� the� th� multipl� comman� lin� i� aborte� an� �
control is returned to the user.

SA� i� particularl� usefu� i� th� use� wishe� t� interjec� � �
dela�� i� � multipl� comman� lin� generate� b�� Menu�� A� �
applicatio� whic� � foun� usefu� wa� t� displa� th� tim� t� th� �
user�� cal� hi� attentio� t� i� (vi� ECHO)� giv� hi� � dela� (vi� �
SAK), and then invoke dBASE II with an initializing command file.

:The COMMENT Command

COMMEN� i� � simpl� routin� whic� allow� th� use� t� typ� a� �
man�� line� a� h� wishe� withou� the� bein� processe� b�� ZCPR2� �
It has no arguments.

COMMENT has two main applications in the ZCPR2 environment:

1. when the console displays are being recorded,
COMMENT allows the user to easily type notes
to the future reader without having to begin
lines with a semicolon (;); all of these lines
are clearly shown to be comments since they begin
with the prompt "COMMENT>"

2� whe� consol� I/� i� redirecte� t� tw� differen�
users, such as CRT and MODEM I/O in parallel,
then COMMENT may be used to provide a simple
mechanism for them to communicate; both users
can type to each other without having any effect
on the system (such as command processing)

COMMENԠ i� aborte� b� strikin� � ^� a� th� firs� characte� �
o� � line� Backspac� an� Delet� bot� serv� t� ech� a� Backspace� �
space, backspace, and ^X and ^U both erase the current line.

I� COMMEN� i� t� b� use� t� cha� betwee� tw� users�� i� i� �
recommende� tha� a� over/ou� protoco� b� employe� (a� recommende� �
wit� th� UNI� WRIT� program)�� Th� firs� use� types�� and�� whe� �
finished�� terminate� wit� th� lette� "o� fo� over�� Th� secon� �
use� type� an� signal� completio� th� sam� way�� Completio� o� �
th� conversatio� ma� b� signalle� b� "o+o� fo� ove� an� out� �
Example:

COMMENT> Hi, Charlie, how's it going? o
COMMENT> Hi, Rick, fine ... and you? o
COMMENT> Fine, Charlie
COMMENT> Here is how I use XDIR -- let me do the typing
COMMENT> from now on ... just watch, and I'll reenter COMMENT
COMMENT> when done ... here goes o+o