home *** CD-ROM | disk | FTP | other *** search
- ACB Ver.1.29b (Shareware Version)
-
- ARCHIVER FOR COMMUNICATION PURPOSES -"TAUGHT CHANNEL"
-
- ACB Ver.1.29b - is designed for preliminary information compression for
- communication purposes.
-
- The use of the ACB algorithm gives the best compression coefficient.
- The associative coding algorithm puts higher demands towards equipment.
- Sizes of archives are decreased by 15-60% compared to ARJ,PKZIP,RAR,UC2.
- This justifies to the most extent increased expenses on data compression
- in telecommunication tasks.
-
- ---------------------- TECHNICAL REQUIREMENTS: ------------------------------
-
- For the work of ACB the following hardware is necessary:
- - recommended - Pentium-133 RAM 16 Mb (512 Kb cache);
- - minimum - i486SX-33 RAM 16 Mb;
- - Operational systems are: MS-DOS 6.0+,
- DOS session in:
- WINDOWS_95 ,
- WINDOWS_NT_4.0 ,
- OS/2 Warp .
-
- - For running ACB under WINDOWS_95, OS/2_Warp, WINDOWS_NT_4.0 it is necessary
- to set:
-
- - minimum size of swapping 8 Mb; maximum not less than 16 Mb;
- - size DPMI must be 16 Mb (sometimes it is sufficient to have 15 Mb)
-
- Note:
- - Usage of archives in the background mode under WINDOWS is effective.
- It can be recommended for computers with 20 Mb RAM and more.
- - For the ACB-algorithm it is necessary to have 15550000 bytes of FREE RAM
- (Cnv+Ext), or if free memory is less, the program can be executed under
- WIN_95,WIN_NT_4.0,OS/2, as the program uses its swapping, that results in
- dramatic slower packing/unpacking in big sizes of data (with 3Mb free RAM,
- slowing down takes place with 100 Kb (or more) of nonpacked data).
- -----------------------------------------------------------------------------
-
- ---------------------------- OVER-ALL INFO: ---------------------------------
- Usage:
- ACB <command> <[path\]archive_name>["context_name] [<[path\]mask>] [...]
-
- Commands:
- b - Backup files to archive with recurse subdirectories
- Note: command "b" has 3 modifications : "B" FAST, "b" NORMAL, "u" MAX.
- bf - Backup only files to archive without recurse subdirectories
- bN | bfN - Where N is size (Kb) of Volumes (enable multiple Volumes)
- r[PSW] - Restore files from archive
- l[PSW] - List archive contents
- p[PSW] - Error Protection
- c[PSW] - Error Correction
- d[PSW] - Deprotection of archive
-
- Note: PSW - password (len<17) can be absent
- After r-operation *.acp->*.acb or *.??p->*.??b (for multiple Volumes)
-
- EXAMPLES:
-
- ACB b win c:\win -packing of the catalogue WIN with subdirectories
- ACB B360 d:\awin c:\win\*.* -FAST packing in multivolume archive (360 Kb.)
- ACB r d:\awin e:\win3 -in catalogue WIN3 copy c:\win\*.* with subdirectories
- ACB uf53pKUK wrc c:\win\*.rc -MAX. packing of only files *.rc from catalogue
- WIN in multivolume archive (53Kb) with setting
- of protection mode with password=KUK
- ACB lKUK wrc -contents of wrc.??p
- ACB rKUK wrc -restore all data from wrc.??p in the current catalogue
- ACB pALmA wrc -setting of protection mode with password=ALmA wrc.??b->wrc.??p
- ACB cALmA wrc -testing and correcting of archive wrc.??p
- ACB dALmA wrc -deprotected wrc.??p->wrc.??b
-
- Commands: l,p,c,d can be used in the "Taught Channel"-mode (see below)
-
- ---- "TAUGHT CHANNEL" - MODE: ----
-
- "Taught Channel" - compression of another portion of information taking into
- account all earlier compressed information -context. For example: you transmit
- by modem a corrected version of the text transmitted yesterday. In this case
- it's possible to expect 100-time compression, in other words, only the latest
- information was transmitted. Besides, there's a possibility to maximize
- compression of the data of a certain type. For example, create a context from
- the files *.txt and use this txt-context to compress txt-files. In addition,
- such an approach ensures additional data protection against non-authorised
- access -it's impossible in principle without knowledge of the whole background
- data being decoded. In unpacking the context should be the same as in packing.
- The context file is renewed each time it is used. For example: you packed the
- text of an agreement using the context, the context file was renewed and can't
- be used to unpack the received archive but the receiving party (in our example
- "office") has a yesterday's context identical to yours up to the latest
- packing, that is why the transmitted archive in the office will be unpacked
- and the context file will be renewed and identical to yours. If you want to
- ban renewal of the context file set it in Read_Only.
-
- Note: the size of a context file grows proportionally to the length of the
- channel background. When the length of the channel background reaches
- 1671 Kb, the size of the context file stabilizes and can vary within
- the range: 1.5 .... 1.9 Mb.
-
- EXAMPLE:
-
- ACB b john"office.jon john.txt - John transmitted to the office a renewed text,
- ACB r john"john.ofs - the office unpacked the transmitted text.
-
- In the given example the name of the context file is convenient to be
- interpreted as address, for John it has the name "office.jon" and in the
- office the name "john.ofs".
-
- OR: ACB Bf3pFANTOMAS john"office.jon john.txt
- ACB rFANTOMAS john"john.ofs c:\john\let
-
- The same but in the multivolume_FAST_mode and with the use of the EP_mode.
-
- --- UPGRATE OF SOFTWARE BY "TAUGHT CHANNEL" - MODE: ---
-
- "TAUGHT CHANNEL" - MODE can be used in replacing old versions of software by
- new versions. General idea: User has an old version of your software. The
- difference of a new version from an old version is not more than 10% of code
- and 10% of documentation. If you organize your distribution by modules with the
- size not more than 1.2 Mb of initial data, "TAUGHT CHANNEL"-MODE can be used
- to update the software of your users. The size of the ACB-archives containing
- a new version of your software will be 4-8 times less compared to compression
- without the use of the "TAUGHT CHANNEL" - MODE.
-
- EXAMPLE:
-
- You have the version ACB_1.23c. In order to give you
- the new version ACB_1.29b I create the ACB-archive with the use
- of the "TAUGHT CHANNEL" - MODE:
-
- ---- Create.bat ----
- rem ACB.EXE - ACB_v1.23c
- ACB u tmp"acb.ctx acb.exe
- del tmp.acb
- rem acb129b.exe - ACB_v1.29b
- ACB u acb129b"acb.ctx acb129b.exe
- del acb.ctx
- --------------------
-
- As a result we receive the following:
-
- ----------------------------
- acb129b.acb <12292 bytes> against <35575 bytes>
- ----------------------------
-
- Now you can unpack and will have the new version ACB_1.29b:
-
- ---- Restore.bat ----
- rem ACB.EXE - ACB_v1.23c
- ACB u tmp"acb.ctx acb.exe
- del tmp.acb
- ACB r acb129b"acb.ctx
- del acb.ctx
-
- ------------------------- AGREEMENTS: ---------------------------------------
-
- ACB - does not have a possibility to add/take out one or several files
- in/out of the archive - only all the data.
- - Files with attributes: hidden, system, read_only are placed to archive too
- - Sizes of the compressed data are not limited, but the maximum separate file
- size is 64 Mb.
- - Maximum number of files in the archive is 4096.
- - Maximum size of the title is 256 Kb (PATH(s)\NAME(s).EXT(s)\ATTRIBUTE(s)).
- - Commands: l,p,c,d can be used in the "Taught Channel"-mode
- - In using FAST-mode (command "B") the speed of compression/decompression
- increases by 1.5 times but the sizes of the archives increase by 2-3% .
- - In using MAX.-mode (command "u") the speed of compression/decompression
- decreases by 1.5 times and the sizes of the archives decrease by 0.3...1%.
- - In using EP-mode (command "p") the sizes of the archives increase by 3.2 %.
- - Formats of previous versions are not supported.
- Creating a multivolume archive the following agreements are observed:
- - 1Kb == 1024 bytes
- - Name of the first volume *.00b...second *.01b...eleventh *.0ab...last *.acb
- - Unpacking begins with *.00b
- - If there is not enough disk space multivolume archive is created
- automatically!
- - For EP-mode (Errors Protection) names *.??b are renamed *.??p
- - For EP-mode always "multivolume archive" mode is set (by default
- size of volume is 13 Mb, if nothing else or more than 13 Mb is set)
-
- -------------------------- CONTENTS: --------------------------------------
- ACB.EXE ACB-compressor v.1.29b (Shareware Version)
- ZIP2ACB.BAT convertor *.ZIP --> *.ACB
- README.TXT text of this file
- ---------------------------------------------------------------------------
-
- ====================
-
- The Registered Version of this program can be purchased and received
- immediately on the Internet at Albert's Ambry. Registration at Albert's
- also eliminates shipping and handling costs. Please go to:
-
- http://www.alberts.com
-
- Search on: acb_129b.zip
-
- Click on the "Buy It" Hotlink to register this software.
-
- Thank you for registering this program.
-
- ====================
-
- George Buyanovsky
- Internet E-mail: new < acb@online.ru > , old < george@acb.alma-ata.su >
-
- 11.30.1996
-