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- UNPACKING AND INSTALLING
- INCLUDING ARCS, ZIPS, LZH AND MORE
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- Many times a shareware package is quite large and has been
- compressed or "archived" to fit on the disk. Another use for
- archiving, or packing many files into one highly compressed
- file, is to decrease telephone charges and time when transmitting
- files by modem. In a previous section we indicated the following
- filename extensions as pertaining to compressed or "archived" files:
-
- .ZIP ---------> Compressed file, use PKUNZIP to unpack
- .ARC ---------> Compressed file, use ARC system
- .PAK ---------> Compressed file, use PAK system
- .LZH ---------> Compressed file, use LHARC
- .ZOO ---------> Compressed file, use ZOO system
-
- Let's take a closer look. For example, the file FUN454.ZIP
- might contain the following files contained within the
- ZIP archive.
-
- FUNNELS EXE
- FUNNELS DOC
- FUNNELS INV
- ATC DAT
- FUNNELS SCR
- FUNNELS TXT
-
- By the way, in the above example, FUN454.ZIP, we are given the
- probable clue that this might be Version 4.54 of the program.
- This is another odd but useful convention when dealing with
- the shareware community and archived or compressed files.
-
- In the shareware trade, one frequently hears the terms "ARCING,
- ZIPPING, UNZIPPING, LHARCING, PAKING" and similar terms. You
- can quickly understand that "archive processing" or compressing
- and uncompressing disk files is what these terms refer to!
-
- Not all disks contain archives - some do, some don't. To unpack
- the program you need a few blank floppies (or a hard drive) and
- a special unpacking utility program to unpack. If your software
- needs this utility, it is usually available on one (or several) of
- your disks or can be ordered from most computer clubs or shareware
- disk vendors. Here is how to unpack an archive file ending in
- ZIP. Other files ending in .LZH, .ZOO and other file extensions
- are quite similar in use.
-
- Files which end in .ZIP are unpacked with PKUNZIP.EXE. For our
- example let's pretend we are unpacking the file SAMPLE.ZIP.
-
- Start with a BLANK formatted floppy. Copy the program file you
- wish to unpack (e.g., SAMPLE.ZIP) and the file PKUNZIP.EXE
- onto the blank floppy. Hard drive users may prefer to simply
- copy the file to be unpacked and the unpacking utility
- PKUNZIP.EXE to their hard drive. For our example, SAMPLE.ZIP and
- PKUNZIP.EXE are now on a floppy in the A: drive.
-
- Next we need a place to put the unpacked files! For computers
- without a hard drive put a blank formatted floppy in your other
- empty B: floppy drive. This is where the unpacked newly expanded
- files will go: the DESTINATION OR TARGET drive for the unpacked
- software. Hard drive users will probably just unpack to the hard
- drive (C:) using a subdirectory on the hard drive as the target
- area.
-
- Using the examples which follow, type an unpacking command
- showing the source drive containing the packed file, the name of
- file and the final destination drive; press enter or return key
- after typing the unpacking command. Of course, substitute the
- name of the file you are using for the file SAMPLE.ZIP. Blank
- spaces in the command ARE essential.
-
- EXAMPLE: A>pkunzip A:SAMPLE.ZIP B:
-
- Translation: unpack or unzip all files from the packed file
- SAMPLE.ZIP contained on the A: floppy drive and send the
- unpacked files to the B: floppy drive. Press enter or return key
- after typing the command.
-
- EXAMPLE: C>pkunzip C:sample.ZIP B:
-
- Unpack files from C: hard drive area to a blank floppy on B:
- drive.
-
- By the way, you can omit the .ZIP file extension for a shortcut.
-
- EXAMPLE: C>pkunzip C:sample B:
-
- Files are now unpacked and ready to use in the conventional
- manner - after unpacking you will probably see the readme, text
- and documentation files you need. The data is now in a more
- familiar DOS file format. The archive can "inflate" more than
- 200% from its compressed format in some cases!
-
- Some programs are very large and may be submitted to you in
- several parts. You might find a program which consists of
- three or four packed .ZIP, .LZH or other archive file(s) on
- several disks.
-
- NOTE! for hard drive users you are usually wise to unpack each
- program to a separate subdirectory on your hard disk. For
- example, to use pcwrite you might unpack the files to C:\PCW. Of
- course, you must first create a subdirectory called PCW on your
- hard drive BEFORE you start. To prepare a subdirectory, use the
- DOS md (make directory) command (example c>md pcw.) Hard drive
- users might wish to delete the original compressed ARC/ZIP files
- from their hard drive since the unpacked versions are now ready
- and the original floppies serve as your backup copies.
-
- UNPACKING ARCHIVED/COMPRESSED PROGRAMS
- ON SINGLE FLOPPY SYSTEMS LACKING A HARD DRIVE
-
- A problem arises trying to uncompress archived programs on
- single drive systems. Most computers have at least two drives.
-
- On a single drive system you may need to uncompress your
- programs to a special memory area of the computer called a RAM
- DRIVE. Your DOS manual covers this option or you can obtain a
- shareware package which produces a ram drive and thus allows
- your computer to "think" it has two floppy drives. This is
- about the only alternative for unpacking software on a single
- drive machine. Generally single drive computers may not be fully
- IBM compatible with many modern software packages which may need
- two drives. Suggest you 1) return disks to vendor for refund or 2)
- consider adding a second drive as most modern fully compatible
- machines offer or 3) attempt unpacking with a RAM DRIVE then
- copy back to disk. Later versions of DOS contain a RAM DRIVE
- program. You can also obtain RAM DRIVE programs from shareware
- and other software vendors.
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