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- ================================ UPDATE.DOC ================================
- ****************************************************************************
- Revision History of DIET 1.45f
- ----- Copyright(C) 1992-6/25 by Teddy Matsumoto -----
- ****************************************************************************
-
-
- History:
-
- Version 1.00x Test Versions.
-
- Version 1.01a (2/1/91) The first version with TSR type.
-
- Version 1.01b (2/16/91) Program which detects EMS memory by checking
- "EMMXXXX0" is open, conflicts with DIET.
-
- Diet conflicts with programs which hooked a function
- call in int21h for disk I/O.
-
- Version 1.02a (2/24/91) Changed method for detecting charcter Device.
-
- Memory resident part of Diet decreased with EMS use.
-
- TSR is disabled while a program, registered in
- environmental string DIETOFF, is running.
-
- DIET returns decompressed file size for the
- function call AH=4Eh/4Fh, while a program registered
- in DIETOFF.
-
- Version 1.02b (3/4/91) TSR disabled when DIETOFF specifies COMMAND.COM
- only when COMSPEC is specified first in environments.
- Now COMSPEC may set in any position in Environment.
-
- Sometimes DIET failed to make temporary files
- in the directory specified by -T option.
-
- Version 1.10a (4/1/91) Automated recompress feature added. New -P option.
- -Z option revised and new -ZR option is used.
- -B option, new.
- Overlay mode compression, -V option, is newly devised.
- New environmental Strings DIETOPT and TMP.
- When TSR part fails to decompress, DIET beeps at you.
-
- Function call AH=4B03 is supported.
-
- DIET hanged when it tries to compress a large,
- approximately 1MB in size, file. This Bug is
- fixed.
-
- DIET sometimes failed to compress EXE file with
- -O option. This Bug is fixed.
-
-
- Version 1.11 (5/12/91) DIET detects if DIET of a different version stays
- resident. DIET warns and exits.
- If you open a file with SHARE.exe, DIET sometimes
- fails to erase temporary files. This Bug is fixed.
-
- There are executable programs with extensions neither
- .COM nor .EXE. DIET checks such files.
-
- New -! option to check authenticity of DIET.EXE.
-
- Version 1.20 (8/20/91) -C option for Check Time Stamp.
- Old -C options is replaced by -H option now.
-
- New -D option to compress Device drivers.
-
- New -K option to kill temporary files after the
- termination of a program.
-
- The DIETed-file Listing option displays all files
- with DIETed file in reverse color.
-
- Version 1.20b(8/30/91) Device driver with xxxxx.EXE can now be compressed
- as a device driver.
-
- Sometimes DIET keeps inactive after it stayed
- resident until some command activates it. Bug fixed.
- IO.SYS, NEC' BIOS ver3.30jis, compressed safely
- now.
-
- Version 1.30x(10/x/91) TEST for New Version at Nifty:FLABO.
-
- Version 1.42 (11/8/91) The first version of Major revision 4.
- Different self-extraction routines are organized
- into a sole format.
-
- Compression modes are organized into
- Data-type and eXecutables only.
-
- DIET compresses overlays as Executable self-
- extracting data file.
-
- device=c:\bin\DIET.exe is possible.
-
- A New code area is moved to EMS, letting
- resident part of DIET is dramatically decreased.
-
- New K-option deletes temporary files only after
- the termination of the process to speed up.
-
- Newly created file recompressed with new option
- -W.
-
- Environmental string 'DIETSIZE' replaced by -S.
-
- Commands DIET ON, DIET OFF newly supported.
- DIETAPI interface is designed and documented.
-
- Version 1.43 (11/22/91) Environmental String NODIET is set.
- TIME STAMP of compressed file updated.
- DIET returns its EXIT codes even when it
- did automated recompression.
-
- Version 1.43a(11/24/91) NODIET=*.ABC matches "*.", this bug fixed.
- Files specified in NODIET string will be copied
- as they are even with -C option, without Decompress-
- Recompress.
-
- Version 1.43b(12/14/91) Automated recompression takes place only when all
- open files were closed.
-
- Version 1.44 (1/22/92) -G option for faster decompression.
-
- -N and -$ options to let DIET activate before you
- leave terminal.
-
- -P option detects overwritten files as decompressed.
-
- When DIET overwrites a DIETed file, -P option
- automatically recompress this file without -W option.
-
- -W option sets automatically -P option on.
- When a DIETed file is archived as the first file with
- LHA with no-compress option, DIET detects the whole
- archive as a DIETed file. Bug fixed.
- With MS-DOS ver5.0 MEM.exe has extra characters with
- DIET on display. Fixed.
-
-
- Major Revisions from version 1.44
- ---------------------------------
- <<<< Version1.44 to 1.45a >>>>
-
- Timing of erasing Temporary Files.
- ---------------------------------
- You execute a DIETed file with READONLY. Call COMMAND.COM as
- a child process, and exit to the original program. Since the
- child process terminated, DIET deletes the decompressed temporary
- file. There is only the DIETed original. You were lost with entry
- point. Now DIET stores information about time stamp in so-called
- PSP in every temporary file generated by unDIETing, and checks this
- value before deleting.
- More explicitly, every time a process terminates, DIET tries to
- delete temporary file without -K option flag set. Checks its
- current PSP value, if the value is not the same of DOS, DIET
- leaves the temporary file as it is. When DOS terminates a
- process, DOS lets DIET erase all the temporary files. DIET
- refrain deleting if the recorded PSP value is smaller
- than the current PSP, Program Segment Prefix.
-
- Collisions on EMS.
- -----------------
- Some TSR program places filenames on EMS page frame DS:DX.
- DIET staying resident on EMS, receives function call from such
- TSR program, then DIET switches pages and continues processing.
- However filename may be processed erroneously by either one of
- DIET or the other TSR program. DIET watches filename on the
- page frame and process it correctly now.
-
- Renamed Compressed Filename.
- ---------------------------
- With auto-compress created file -W option set. Suppose an editor does:
- copy textfile.DOC textfile.TMP
- rename textfile.DOC textfile.BAK
- edit textfile.TMP
- rename textfile.TMP textfile.DOC
- Only the textfile.TMP is recorded as the object for automated
- compression, if the file-names are concerned. DIET set -P option
- automatically with -W. Now DIET sets auto-recompression flag on
- files renamed with function call 56H. With this change, DIET
- compresses textfile.DOC and erases textfile.TMP. Please try with
- your editor.
-
- <<<< Version1.45a to 1.45b >>>>
-
- New -E option to retrieve files opened with Read Only attribute.
- ---------------------------------------------------------------
- When a file with READONLY attribute is accessed by Multiple
- Tasks or a file renamed as temporary under Task-Swapping, a
- temporary file might remain on your disk. DIET makes a
- decompressed temporary file when a READ-ONLY file is accessed,
- and its file handle is handed to a procedure. With this -E
- option, DIET decompresses the named file, and hand it over to
- procedure. Then the decompressed file has auto-recompression
- flag on, and is decompressed automatically if you specify -P
- option.
- I am quite sure, that you have a chance to use this option
- Try if your application uses a read-only file with some of
- the temporary file remain on your disk.
-
- DIET detects file with auto-recompress flags.
- --------------------------------------------
- In case of editors, there are two types of editors.
- Type A creates a file with extension .TMP, say,
- renames the original with .BAK. works with .TMP and renames
- it to the original name when editing is over.
- Type B does not leave .BAK, renames original with .TMP,
- and DELETES the original first, then works with .TMP and renames.
- When editing is done, DIET has to move file-handle to the right
- file to be recompressed, with extraneous efforts for both types
- of editors.
-
- Time Stamp Set.
- --------------
- DIET opens a file and reads its time stamp, copies it on the
- TMP file. For READ-ONLY file, DIET deletes TMP file when a
- process terminates and recompresses the original with time
- stamp that of TMP file. DIET version 1.45a has changed algorithm
- of copying TIME STUMP slightly. Consequently some application
- failed to transact to files distributed from updated versions.
- DIET newly introduced a well organized system to deal with
- TIME STAMP recording.
-
- <<<< Version1.45b to 1.45c >>>>
-
- DIET stays on UMB.
- When you use DOS 5.00 with device driver like HIMEM.sys,
- you may use Upper Memory Block for DIET to stay. You just
- don't do anything. DIET automatically detects available UMB,
- and moves into the area and stays resident there.
-
- I could not check all of the similar device drivers.
- However, you may try and will succeed to let it stay UMB resident.
- DRDOS6.00 and shell 4DOS does not support DIETAPI.
-
- You write a line in your config.sys,
- (o) device=diet.exe /z0 /p /j ...
- and if you have available UMB, you see DIET becomes TSR on UMB,
- NOT as a device driver.
- LOADHIGH is not necessary for DIET, namely, you don't have to
- write a line in the form:
- (x) devicehigh=diet.exe /z0 /p /j ...
- DIET does detect UMB by itself.
-
- Bug fixed with COMMAND.COM in UMB
- ---------------------------------
- With version 1.44 DIET acted abnormally when COMMAND.COM or
- BUFFERS were in UMB area. This Bug is fixed now.
-
-
-
- <<<< Version1.45c to 1.45d >>>>
-
- Bugs fixed.
- ----------
- Set -P or -W option with TSR DIET. Activate a shell program,
- issue a command within the shell, a DIETed program. Then suddenly
- you are exited from shell you started. These phenomena happened with
- shell programs FD and FILMNT, popular in Japan. In some cases,
- you are exited even without doing anything.
-
- Japanese popular encoder ISH.COM, equivalent of UUENCODE-DECODE,
- failed to recover original file extension, when file name does
- not have full length of 8 letters.
-
- These Bugs were fixed.
-
- Change in Algorithm.
- -------------------
- In modern applications, a file will suffer from renamings, copying
- to temporary files and deletions. DIET is must follow the correct
- file name which is to be restored finally. DOSSHELL or other shells
- with TASK-SWAPPING made DIET difficult to follow, or made DIET do
- unnecessary jobs for temporary files abusing your time.
-
- DIET essentially follows the two principles:
-
- 1. When a DIETed file is renamed or deleted, file name is recorded
- by DIET, but the file does not have auto-compress flag on.
-
- 2. When an unDIETed file is renamed to a name DIET has recorded,
- the file has auto-compress flag on.
-
-
- Remark.
- There were some minor revisions made to improve performance.
-
-
- <<<< 1.45d to 1.45f >>>> 06/25/1992
- CPU cache for 80486
- -------------------
- Self-extracting DIETed halted with CPU80486
- because of 32 bytes cache in CPU. This version
- revised from 145d, mainly for this reason.
- Since this is a test version, there is a new optional
- command to reveal information in the process of
- DIETing and unDIETing.
-
- ' -^ ' :option
- diet -^ xxx.exe
- shows informations with 'xxx.exe' if it is a DIETed
- executable.
-
- ------------------------------------------------------------------
- 92/6/25 Nifty: GBG00230 Teddy Matsumoto
- ------------------------------------------------------------------
- The address in DIET144.DOC
- okubo@tansei.cc.u-tokyo.ac.jp
- is not valid anymore. Internet users please direct
- mails to either one of the following:
- kenjirou@mathdent.im.uec.ac.jp
- c00236@sinet.ad.jp
- Kenjirou Okubo
-