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============= Changes for ECU 3.10 =======================================

This file gives hints about what has changed.  Rereading or skimming
the manual is highly recommended.  My apologies if some changes did
not get reflected in the manual.  Please let me know.

1. Add nice interactive and procedure commands and %nice integer function.

2. Add the %uid and %gid integer function.

3. If ECU starts setuid, always reset the uid to the real uid.
   Previously this only happened if ECU was setuid to root.

4. Made compatible with Metro Link X11R4 xterm under SCO UNIX/386.
   To use:
   a. include -DMETROLINK_X11R4 in CFLAGS of ECU compilation.
   b. edit the models/nonansikeys file patched by this patch
      to comment out the SCO ODT xterm key definiton and
      uncomment the Metro Link X11R4 definition.
      Follow other instructions you see in the nonansikey file.

5. Fixed miscellaneous typos and misspelled words in models/nonansikeys.

6. Environment variables LINES and COLS override termcap li and co
   values like terminfo curses does.  This gives you the correct
   size screen on xterms, but the ecu curses stuff still sees
   the termcap description un altered, giving you shorter (usually 24 line)
   dialing and help menus.

7. Support is provided in nonansikeys for Metro Link's MetroX newest
   xterm (the one that uses pty pseudottys).  (Some of the key
   bindings are differerent and some .xinitrc and xterm resources
   are required; see 'models/nonansikeys'.)

8. The -N switch for the procedure commands sx, sy, sz, rx, ry, and
   rz forces the "no curses" mode for file transfer.  This mode
   uses brief, tty-style reporting of file transfer progress.
   The "no curses" mode is automatically invoked if the console
   is not a pty or multiscreen and has a lower baud rate than the
   attached communication line.

9. I added a dialer for the "generic Hayes-style 2400" (dialgHA24) and
   for the USR Courier 2400 (dialgUSR24).  My USR is at least
   6 years old and I don't even know if they still make them or
   if it is the same modem.

10. A new config procedure greatly simplifies making and installing.

11. I don't know if this will get it or not, but to try and help
    our European friends to be able to use alt_[a-z].ep, the keycodes
    required in the mapkeys file have changed from
      128 through 153 (0x80 through 0x99)     to
      229 through 249 (0xE0 through 0xF9).
    Reread mapkeys/README.

12. Termination of file transfers by SIGINT did not cause termination
    of procedfure execution in pre-3.10 versions.  In this version, it does.

    The appropriate manual sections have been updated to indicate:

    Integer variable $i0 receives the exit status from the transfer.
    Note: procedure execution IS terminated by a SIGINT to the spawned
    file transfer process.  This is different than for versions prior
    to 3.10.  If $i0 is set to -1, the file transfer program did not
    begin.

13. kbdtest3 is included to help figure out nonansikey configurations.
    see models/nonansikeys.

14. SCO UNIX MEMMOVE() AND GCC

memmove() is a very, very fast non-overlapping memory copy, but
since it does not save certain registers it uses, calling from
GCC can be tricky.  GCC does a fabulous job of grinding all it
can out of the available registers; MSC doesn't make very good
use of registers, er, I mean keeps a lot of registers for scratch
use.  I've never seen 386 MSC use dx except as a side effect of
multiply.  I guess that's what somebody (Gates?) meant by "tuning"
one compiler to meet many needs being adequate. Enough philosophy,
though.

I am using of -fcall-save-{ax,bx,cx,dx} since in at least one
case (ecufkey.c display_keyset()), rigorous optimization and
really righteous register usage caused a call to strlen() to
screw up since cx is not preserved by strlen.

strlen:         push    edi
strlen+0x1:     mov     edi,[esp+0x8]
strlen+0x5:     xor     eax,eax               <-- goodbye ax 
strlen+0x7:     mov     ecx,0xffffffff        <-- goodbye cx
strlen+0xc:     repne   scasb
strlen+0xe:     inc     ecx     
strlen+0xf:     mov     eax,ecx 
strlen+0x11:    not     eax
strlen+0x13:    pop     edi
strlen+0x14:    ret

memmove:        push    ebp
memmove+0x1:    mov     ebp,esp
memmove+0x3:    mov     edx,edi               <-- move rather than push
memmove+0x5:    mov     ebx,esi               <-- move rather than push
memmove+0x7:    mov     esi,[ebp+0xc]
memmove+0xa:    mov     edi,[ebp+0x8]
memmove+0xd:    mov     eax,edi               <-- goodbye ax 
memmove+0xf:    mov     ecx,[ebp+0x10]        <-- goodbye cx (OK w/MSC)
memmove+0x12:   jcxz    memmove+0x43
memmove+0x14:   cmp     edi,esi
memmove+0x16:   jbe     memmove+0x2e
memmove+0x18:   mov     eax,esi
memmove+0x1a:   add     eax,ecx
memmove+0x1c:   cmp     edi,eax
memmove+0x1e:   jae     memmove+0x2e
memmove+0x20:   mov     eax,edi
memmove+0x22:   add     esi,ecx
memmove+0x24:   add     edi,ecx
memmove+0x26:   dec     esi
memmove+0x27:   dec     edi
memmove+0x28:   std
memmove+0x29:   rep     movsb
memmove+0x2b:   cld
memmove+0x2c:   jmp     near memmove+0x43
memmove+0x2e:   mov     eax,edi
memmove+0x30:   test    Byte Ptr 0x1f:0x1,al
memmove+0x36:   je      memmove+0x3a
memmove+0x38:   movsb
memmove+0x39:   dec     ecx
memmove+0x3a:   shr     ecx,1
memmove+0x3c:   rep     movsw
memmove+0x3f:   adc     ecx,ecx
memmove+0x41:   rep     movsb
memmove+0x43:   mov     esi,ebx
memmove+0x45:   mov     edi,edx
memmove+0x47:   pop     ebp
memmove+0x48:   ret
memmove+0x49:   nop
memmove+0x4a:   nop
memmove+0x4b:   nop

15.  A documented feature is that upon connecting to a remote
dialed through the directory, if a 'fkey' key set from ~/.ecu/keys 
matches the directory name, the key set is automatically loaded.
This feature has never worked (I never used it or tested it.)
Recently I told someone they could use it and they reported it
did not work.  It does now.

16. The example file models/sz_update.ep was treating skipped files
as a failed transfer.  This was fixed.

17. Interactive and procedure commands 'pushd' and 'popd' were added.

18.  Adding pushd and popd documentation made ecu.man too long
giving me "word overflow" and a core dump from my nroff.  So,
there are now two documents, ecu.man and exits.man.  The latter
is very short and is just a kludge since the former is as long as
it can be.

19. Added the procedure rlog command for procedure control of
receiver logging.

20. Added _initial.ep, _connect.ep and _hangup.ep. See "Special
Procedures" in the manual.

21. The use of #ifdef GCC140 is made to take advantage of a
assembly source generation bug fix in gcc 1.40.

22. Running ecu with no pre-existing phone directory and specifying
a logical phone number (directory entry) to dial caused erratic
behavior or core dump.  This has been fixed.  Thanks for the report
from [e-mail].  He did a good job of testing
an alpha version of 3.10.

23. Pressing an invalid function key during interactive command
entry used to destroy the string being entered.  This has
been fixed.

24. The ESCape vs. function key keyboard input discrimination
algorithm has been improved.  Fewer, if any, function keys will now
misinterpreted as ESCape keys followed by "junk."
README.P1           ECU 3.10 Patch 1     Mon Aug 12 03:46:20 EDT 1991

This describes patch 1 to ECU 3.10, bringing the program to
version 3.11.  Due to the manner in which the program builds its
version strings, patchlevel.h should contain #define PATCHLEVEL
11.

To use
------

To apply the patch, unshar all of the parts.  This step will
create patch files and overwrite some files whose diffs were
larger than the new files.

type the command
    sh PATCH1.APPLY

then do the
    Configure
sequence and re-make

Once you are satisfied the patch has been correctly applied,
you may 
    rm PATCH1.*
and
    make neat
to remove the usual crud and peanut hulls left on the floor after
a patch operation.

This patch fixes the following problems:
----------------------------------------

1.  ISC lock files are placed in /usr/spool/locks.  ECU now has a
configurable lock file directory whose name is automatically selected
depending upon the machine type.

1.  1.  Several problems with compiling the the makedirs program under
XENIX were fixed.

3.  The 'w' (wait) subcommand of the dialing directory screen was not
asking for both single and multiple entry list weait values, but only
the first.

4.  VT220 and perhaps other terminals insist upon generating the CSI
(ESCape plus 0x80) character as a function prefix.  To handle the need
for eight bit keryboard support for nonansikeys, I did the following:

   a. fixed the ECU code to honor the full eight bits of keyboard
      code sequences when processing function key reads.

   b. removed other code that masks the parity bit of various data items.

   c. added code the kbdtest3.c that includes an stty -a listing for
      the keyboard at the time it is run.  I also specify in clearer
      terms what parity was in use and that may be required to use
      the keyboard.

5.  Previously, you had to have a copy of nonansikeys in each user's
.ecu directory who use non-ANSI consoles.  You may now put a single copy
in the ECU library directory (usually /usr/local/lib/ecu).  ECU searches
first in ~/.ecu then in the library directory.

5a. The manual stated a number of restrictions regarding
the codes which can be transmitted by a keyboard to be supported
by the non-ANSI console feature.  I missed updating that manual part
when I released 3.10.  ECU 3.10 merely requires the code sequence
to be free of nulls and less than 33 characters in length.

6.  The models/nonansikeys file has been updated to include an entry for
the latest Metro Link X11R4 server.  The new server has improved default
key bindings and the previously dead KP_5 (unshifted Keypad 5) lives.

7.  In previous revisions of ECU, when editing an existing string on a
screen, the cursor was placed at the end of the line at the commencement
of editing.  This was untrue of 3.10 and this patch restores the
behavior.

8.  Baud rates below 300 now get two stop bits.  I doubt anyone is using
110 baud but if you ever get the hankering, it will work now.

9.  In the respond function of the expect-respond handler, \n sent CR
not NL as documented.

10.  The test for an environment HZ was incorrect causing the
sys/param.h value to be used always.

11.  The 'nap' procedure command napped for the wrong amount of time if
the -m option was used.

12. Under some conditions, ecuungetty would find a lock file created by
its (parent) ECU and report that the line was in use by another dial out.
This has been around for a long time.

13. The command history mechanism got botched up by some last minute
changes to the tty line input editor.