EED - Extended EDitor

The Text Editor in the 41CX represents  a  major  improvement  in
manual  ASCII  file  handling.   This little program, EED, incor-
porates automatic creation and resizing of the file and  provides
a  few  other  functions I've found useful, including printer and
mass storage support.   If you don't have these, you  can  easily
delete   the   relevant   routines   (and  any  others  you  deem
unnecessary).  Also, some of the routines might be useful separa-
tely (even for C/CV users).

User instructions:
0.  Ensure there is a zero-byte program file named " " (space) in
the X-memory (needed to reactivate key assignments; see PPC  Cal-
culator  Journal  V10N8P53c  or  V11N4P11, or Keith Jarett's book
"Extended Functions made easy", program "IN").  EED can easily be
modified  to  use  other  key suspension techniques (like PPC ROM
SK/RK) or the assignments may simply be cleared (either  selecti-
vely  or  by CLKEYS); or you may just trust that there is nothing
assigned to the local label keys (delete  lines  1-6,  33-35  and
196-198).
1.    Place  the  file name in ALPHA and XEQ "EED".   If the file
doesn't already exist it will be created, its type is checked and
it is resized as large as possible. Then key assignments are sus-
pended and ED is entered.
2.   The following operations are available when you exit ED.  In
most  cases  you must set the pointer (cursor) before leaving ED.
After the operation is completed, ED is re-entered automatically.
R/S with ALPHA off returns to ED without doing anything else  (if
you stopped to think or something).
R/S with ALPHA on searches for a string (POSFL): place the string
in ALPHA and press R/S (with ALPHA on).  If it is found (after
the current pointer position) the cursor is positioned at  it,
else a tone sounds and the cursor remains where it is.
A: Loading  the  file  from  mass storage: place the mass storage
file name in ALPHA if it differs from the XM  file  name,  and
press A.
B: Printing  records:  enter bbb.eee in X, where bbb is the first
record you wish to print and eee the last, and press  B.    To
print the entire file, use .9.   This works with the 82143A as
well as any HP-IL printer or video interface  (utilizing  full
line  length,  one  record per line if possible).   Characters
128-255 will be sent mod 128, however (blame ACA).
C: Non-keyboard characters: enter the character  code  1-255  and
press  C.    If you wish to enter a null, you must key a dummy
character in ALPHA first and delete it when back in ED.
c: Changing multiple occurrences of a string: Place  "/s1/s2"  in
ALPHA,  where  / may be replaced by any non-null character not
occurring in either s1 or s2, pointer limit in X, and press c.
All occurrences of string s1 between  current  pointer  and  x
will  be  changed  into s2.   Both s1 and s2 must be at most 7
characters long.
D: Deleting characters near the beginning of a big file is rather
slow if you do it character-by-character in ED.  This provides
a faster way: just key in the number of characters you want to
delete  (from  the  pointer  position,  not  beyond the end of
record) and press D.
d: Deleting multiple records: enter the  number  of  records  you
wish to delete (from current on) and press d.
H: Moving  half-records: pressing H will move the end of the cur-
rent record, from pointer on, to the end of the  record  whose
number is in X. This allows you to split a record in two, join
two records, or just move a record around.
I: Inserting  characters  in  a  big  file can also be annoyingly
slow.   You can insert up to 24 characters  simultaneously  by
keying them in ALPHA and pressing I (leave ALPHA mode first).
3.   When you've done with the file for the time being, there are
three ways to leave EED (exit ED first):
E: This will only resize the file to minimum in XM.
J: This will save the file in  mass  storage.    Place  the  mass
storage  file  name  in  ALPHA  if it differs from the XM file
name.  If the mass storage file does not exist, necessary size
is  computed and displayed with a tone.   You may enter a dif-
ferent (bigger) size if you wish; then press R/S and the  file
will be created. (Note that the size will always be rounded up
to the nearest multiple of 32, but the estimated size is disp-
layed  accurately  to  give  you some idea about how much room
there would be left.   The estimate is usually a few bytes too
big, depending on the number of odd-length records.) After the
file   has  been  saved,  a  tone  sounds  and  display  shows
"PURFL?Y/N".   If you wish to purge the file from XM, press Y;
if  you  wish to retain it there, press N - it will be resized
to minimum as in E.
e: If you wish to purge the file from XM without saving it, press
e.  As above, you will be asked to verify this drastic step by
pressing Y.
Registers R00 and R01 are used (to save the file name),  and USER
is left on. The file name is left in ALHA and its size in X.

Technical notes:
- Line 111 appends 6 nulls (hex F77F000000000000).
- Lines 1-6 and 198 are necessary in case EED is the last program
in CAT 1.   Then the GETP in line 197 will cause program execu-
tion to continue from line 1.   Note that the  program  may  be
started by R/S immediately after loading even though it doesn't
begin with label.
- VERIFY  on  line  148 is only used to check if the file already
exists on mass storage.   Extended I/O ROM owners might substi-
tute FLTYPE or FLLENG.
- Lines 79-81 are needed with the 9114A Disc Drive only.  Similar
operation is not needed with SAVEAS because preceding VERIFY or
CREATE has left the drive motor spinning.
- In certain operations a few extra bytes are needed in the file.
In H and c characters  are  inserted  before  deleting  because
DELCHR may delete the entire record.

Tapani Tarvainen [337]
Kiljanderinkatu 2 A 7
SF-40600 JyvÌskylÌ
Finland