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-
- LHA205 HELP GUIDE
-
- by Irv Hoff, cleared by Yoshi-san
-
- 27 January 1991
- NOTE: The help guide built into LHA.EXE is still
- in Japanese. Refer to the very end of this
- LHA205.HLP for the English version last made
- available.
-
-
-
- LHA205 - WHAT IS IT?
- -------------------
-
- LHA205 is a dual purpose archive program.
-
- 1) Its primary purpose is to take normal binary or text files
- and make them smaller in size. This saves great amounts of
- storage space, with typical results being approximately 1/4
- to 1/3 of original size. It can handle any size file that
- can be placed on the disk, together with the compressed file
- it then makes. Files in excess of 1 Mb may be easily used,
- even though perhaps only 200 Kb RAM might be available.
- This eliminates any potential problems from one computer to
- another.
-
- It does this with by using special "compression tables."
- These are automatically built into the program and involve
- mathematical procedures which are simple for a computer.
-
- 2) The secondary purpose is to take more than one of these
- programs and include them in just one file, although each
- will have its own individual name inside that file.
-
- This is called an "archive." In the days of
- CP/M, they were called "library" files. In the
- early days of MS-DOS (and other comparable pro-
- grams used by IBM computers) they were called
- .ARC files.
-
- However, as other comparable programs appeared,
- they were given various "extents" to identify
- the program used. Some sample names are .ARC,
- .DWC, .LZH, .PAK, .ZIP, etc.
-
- Each has its own special characteristics.
- Lists comparing the various programs are
- available.
-
-
- ARCHIVE FILES
- -------------
-
- LHA205 can have hundreds of files in a single .LZH archive.
- This allows storing complete hard disk directories in a space
- typically 1/2 or less the original total - although many of the
- files might already be archived.
-
- One such check made a file called "TEST.LZH." It had 200 files
- and was 41% the original directory size.
-
- Not only is this a great saving in size for storage, but puts
- (in this case), the 200 files into one, single file. This is
- often beneficial. Among other things, all files associated with
- one program are kept together in the same archive.
-
-
- ------------------------------------------------------------------------
-
- SIMPLE INSTRUCTIONS FOR USING LHA205:
- -------------------------------------
-
- 1) To compress one file called ABC.TXT. (It will make a
- file called ABC.LZH.)
-
- 'a' LH205 a ABC ABC.TXT
- or
- 'a' LH205 a ABC.LZH ABC.TXT
- ^ ^ ^
- a b c
-
-
- a = command
- b = archive program name
- c = pgm (or pgms) to be added/compressed
-
-
- Either is suitable, one requires more typing.
-
- a) In this case, the "a" is called a command. There are
- 12 of those available (shown below). A few are dupli-
- cates to initially help users more familiar with other
- programs.
-
- Typing LH205 will display this list on the screen. It
- also gives a very short summary what the command does.
-
-
- 2) ADDING a program to an existing file:
-
- 'a' LH205 a ABC ABC.DOC
-
-
- 3) ADDING SEVERAL files at one time:
-
- 'a' LH205 a ABC PGM1.EXT PGM2.EXT PGM3.EXT
- ^
- archive name
-
- 4) DELETING a file called PGM4.EXT:
-
- 'd' LH205 d ABC PGM4
- ^
- archive name
-
- 5) EXTRACTING a file called PGM4.EXT:
-
- 'e' (or 'x') LH205 e ABC PGM4
- ^
- archive name
-
- 6) LOOKING at the archive contents:
-
- 'l' (or 'v') LH205 l ABC PGM4
- ^
- archive name
-
- 7) DISPLAY a text file in an archive:
-
- 'p' LH205 p ARC PGM4
- ^
- archive name
-
- COMMANDS:
- ---------
-
- There are 12 commands available (several are duplicates, to
- make the program somewhat more compatible with programs that
- may have better-known to the user. The 'l' and 'v' are very
- slightly different, the 'v' putting the file name on a line
- by itself.)
-
- These are listed by typing just LHA without any command of file name:
-
- a: Add files to archive u: Update files to archive
- f: Freshen files in archive m: Move new files into archive
- d: Delete files from archive p: disPlay files in archive
- e: Extract files from archive x: eXtract files with directory
- l: List of files in archive v: View list with directory
- t: Test integrity of archive s: make a Self-extracting archive
-
-
-
- SWITCHES
- --------
-
- (There are 15 "switches" which will be explained in the
- MANUAL. Those include:
-
- <option>
- r: Recursively collect files w: assign Work directory
- x: allow eXtended file names m: no Message for query
- p: distinguish full Path names c: skip time-stamp Check
- a: allow any Attributes of files z: Zero compression (only store)
- t: archive's Time-stamp option h: select Header level (default = 1)
- o: use Old compatible method n: display No indicator
- i: not Ignore lower case l: display Long name with indicator
- @: Response file name option
-
- - end -
-
-