home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Go64!
/
Go64_1999-07_1999_CSW_Side_B.d64
/
unzip.docs
< prev
next >
Wrap
Text File
|
2023-02-26
|
9KB
|
357 lines
Unzip64v2.12
------------
Copyright 1998 Errol Smith
What's New in 2.1?
------------------
- Main inflate routine is now MUCH
faster than before, (I re-wrote most
of it from scratch..)
- GZIP (*.gz) extraction!
- Fixed handling of ZIP's with paths
- Extracts some ZIP's made on *nix that
2.0 wouldn't
- 32bit CRC error checking
- 2mhz mode on a 128 in 64mode
- SCPU optimized
- dos command functions
- no longer clobbers BASIC on exit
- dozens of other internal changes,
minor bug fixes etc etc..
Introduction
------------
Unzip64v2 is a c64 program to extract
'ZIP' compressed archives created by
PKZIPv2.04g, Info-Zip 2.x or equivalent
programs. (extension '.zip')
Unzip64v2.12 will also now extract
'gzip' compressed files. These are made
with the GZIP compression program
commonly used on unix machines, and
have the extension '.gz'.
Unzip64v2 will work on a c64 or c128
in 64 mode. It is also compatible with
most expansion devices such as REU's
(using ramdos) and CMD products such as
hard drives, SCPU's etc. Unzip64v2.1
takes advantage of 2mhz mode on a c128
(in 64 mode) and is CMD SuperCPU
optimized.
This program is free to be distributed
as long as it is in it's original
archive, (UNZP6421.PRG)
NOTE The file is a Self-eXtracting-Zip,
-not- a 'normal' c64 program. Please do
not compress it with something else!
(you won't gain much if you try)
If you find the program useful, I
would appreciate some encouragement to
continue development. A donation of $10
(or more!) is suggested, though an
appreciative email/letter will suffice
if you can't afford a measly $10 or so
contribution (-:
I would also be happy with donations
of software (eg. if you are a software
author or distributor), or hardware
(eg utility carts - AR, FC etc, or any
CMD device). If you would like to
donate any of the above please contact
me in advance.
Anyone making a contribution will
recieve acknowledgement in this
documentation and/or on my web page.
I would like to thank all the people
that helped beta test the program and
provided feedback & suggestions.
Contact Information
-------------------
The latest news & updates of unzip64v2
can be found on my c64 web page at:
http://www.ros.com.au/^errol/64.html
(note the ^ above represents a tilde or
'squigly line')
Internet e-mail: errol@ros.com.au
Fidonet Netmail: Errol Smith
3:712/523.5
I can also be contacted in any of the
Fidonet CBM, CBM-128 & CBM-GEOS echoes.
Snail Mail:
Errol Smith
PO Box 119
Round Corner
NSW 2158
Australia
Important Notes
---------------
* To use RAMDOS with unzip64v2, set the
interface page at 207 ($cf)
* Unzip64v2 is always in development,
and may contain bugs. Any bug reports
& suggestions for improvements are
welcome. If reporting a bug I would
apreciate being sent the zipfile that
caused the error (if the program
crashes on a valid zip file).
* Unzip64v2 cannot decompress ZIP's
created by PKZIP1.xx. You will need to
use Bill Lucier's Unzip64 or David
Schmolls NZP128 package to decompress
these files. (the exception to this is
if the files are all stored, but that
is unlikely).
If Unzip64v2 says 'UNSUPPORTED!' when
unzipping then you probably have a
ZIP1.xx archive.
* The distribution archive -IS- a self
extracting zip archive. Unfortunately
the code is custom written for this
package and isn't publicly useable.
There are several practical limitations
to using zip for self extracting files,
but I will endeavor to release a
publicly usable 'SXZ' (?) module in the
future.
I didn't call the distribution an SFX
as it would be confused with LZH SFX
files. I propose the extension 'SXZ'
for future Self eXtracting Zips. Any
comments? Anyone?
Main Menu
---------
Most options are reasonably self
explanatory but I'll detail them anyway
to avoid any confusion.
F1 - Shows a directory of the source
device, using the source path.
F2 - This toggles the source device
number. This is the device that
the .ZIP or .GZ file is on. It
will automatically find the next
valid device on your system. Valid
device numbers are 8 through 30.
+ - Change the source path. This is
only of use to users of CMD drive
devices, and allows you to set the
partition & subdirectory for the
source zip/gz files. The path you
enter is pre-pended to the input
file verbatim. It MUST include a
trailing colon! CMD path example:
23//mystuff/:
Where "23" is the partition, "//"
is the root directory, "mystuff"
is the subdirectory, and "/:" ends
the path. Got it?
@ - Send a dos command to the source
device. You can use this to
scratch, rename, copy etc.
Hit only return to read the error
channel without sending a command.
Enter $ to read the directory of
the device (note this uses the
current/default path of the drive,
NOT the path defined with '+')
F3 - Shows a directory of the
destination device, using the
destination path.
F4 - Toggles the destination device
number (where the extracted files
will go). Similar to F2.
- - Change the destination path. This
is where extracted files will go.
See notes above about source paths
& remember the trailing colon.
* - Send a dos command to the
destination device. Similar to the
@ command above.
F5 - Set zip filename. Allows you to
set the name of the input file.
F6 - Toggle the default output file
type - P (PRG) or S (SEQ). This is
the file type that extracted files
will have. Note you can manually
override this with individual
files.
F7 - Unzip a file. This starts
unzipping the specified file. See
'Unzipping' later on for details.
F8 - Change unzip mode. This toggles
between 'zip' mode for .ZIP files
& 'gzip' mode for .GZ files.
Select the appropriate mode before
hitting F7!
q - Quit unzip64v2 & return to basic.
Press 'Q' (shift-q) for an AR
friendly reset.
Generally to use unzip64v2, you set
the appropriate source & destination
devices (and paths if needed), set the
zip file name with F5, then start
unzipping with F7.
UnZipping - Zip files
---------
Unzipping handles files within the zip
archive one at a time. As each file is
processed, the filename will be
displayed, followed by a query with
options [ynqaps]. Each letter means the
following:
y - Extract this file using the default
file type.
n - Do not extract this file & skip
to the next one.
q - Quit unzipping & return to the menu
a - Extract this file and ALL remaining
files without further prompts,
using the default file type.
p - Extract this file as a PRG file,
regardless of the default type.
s - Extract this file as a SEQ file,
regardless of the default type.
Simply press the letter of the option
you want.
Unzipping - Gzip files
There are no options for gzip files,
as they contain only one file. The file
is decompressed automatically when you
press F7.
Unzipping - General
The screen border will flash during
decompression (inflating). This is to
indicate activity, and for debugging.
When a file is finished being
extracted, you will normally get an OK.
This means the file passed the 32bit
CRC check. If you get a 'CRC error',
then the extracted file is corrupted,
which usually means the ZIP or GZ file
it came from is also corrupt.
Please ensure there is adequate disk
space on the destination drive before
beginning!
Past, Present & Future
----------------------
This program has been in development
part-time for over 2 years (since late
1995). I began the project primarily as
a self-education on compression theory.
It was also a shift from my previous C=
experience which was mostly as a demo
coder ('Strobe').
The program code is based partly on
publicly available C source
(eg. Info-Unzip) along with many other
sources of information on compression
theory, and the deflate algorithm in
particular.
I have many ideas for the future, both
my own and that of the many people who
have provided input to this program
during development. Though I can't
promise to do all (or any) of them,
here are some of the ideas for future
versions: (in no particular order)
- User Interface improvements
- Native 128 version
- Ability to list the files in a zip
without extracting them
- Pick list for choosing source zips
- Creation of stored zip files.
- Creation of compressed zip files (!)
- Self eXtracting Zip routine (SXZ)
for general public use.
- Decompression of zip1.xx archives
(imploded, shrunk, reduced)
- Decompression of D64 files (emulator
disk image) directly to a 1541 disk.
Which of these is done and when will
be determined largely by user feedback
as to what people want, how much
inspiration I have, what is practical,
and how much encouragement I get! (-:
Compression is a large step, and might
be difficult to achieve on a stock 64.
Creation of stored-only zip archives is
relatively easier, but the usefulness
of uncompressed archives is perhaps
questionable.
Anyway, comments, constructive
criticism or cash payments are all
welcome! <grin>
Errol Smith
Strobe/???
End.