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- From: James_Hastings-Trew@telepro.UUCP (James Hastings-Trew)
- Newsgroups: comp.sys.amiga.graphics
- Subject: Re: double hard drive capacity??? NOT
- Distribution: world
- Message-ID: <James_Hastings-Trew.0kim@telepro.UUCP>
- Date: 15 Sep 92 17:50:48 CST
- Organization: TelePro Technologies
- Lines: 86
-
- In a message dated Tue 15 Sep 92 12:41, 10667547@eng2.eng.monash.edu.au (ji
- wrote:
-
- > Slight correction. It's called XPK, version 2.3
- > It will be free-ware at the end of the month and will be available from
- > FTP.
- > Someone said I could BMS it from them, but I'm dumb and don't know what
- > BMS
- > is. Guess I'll have to wait until the end of the month....
- > This information is second hand... Perhaps it should become an FAQ, as
- > I
- > asked for such a program a while back too....
-
- > Jim
-
- I downloaded XPK last week from a bulletin board. Can't remember which one
- off hand.
-
- Anyway, here is the skinny:
-
- XPK consists of a number of compression libraries, a patch for LoadSeg, and
- a handler for a special type of device that can contain compressed files.
- It also has a few C: commands for compressing and de-compressing files.
-
- First of all, the compressors are VERY fast - as fast as LHA, and nearly as
- efficient. The decompressors are blazingly fast. I compressed a 1 meg
- executable (Imagemaster) down to half size. The normal one takes 11 seconds
- to load. The compressed one takes 8 seconds.
-
- When accessing files from the specially mounted device, compressed files
- are totally transparent to the operating system. For example, you can
- compress an ANIM file, and then use any standard VIEW program to look at
- it. As long as you approach the files through the mounted device, and not
- through the normal path, the decompression is completely transparent.
-
- For example, if you have a directory on dh0: called "Stuff" and you created
- a XPK device from that directory as so:
-
- Assign XFH0: dh0:stuff
- mount XH0:
-
- if you enter the directory like so:
-
- cd dh0:stuff
-
- the files will appear to be compressed, and unavailable to your
- applications. If you enter the directory like so:
-
- cd XH0:
-
- then the files will be transparently decompressed for you as you look at
- them, copy them, use them, etc.
-
- If you copy a file from dh0:Stuff to RAM:, you'd get the compressed
- version. If you copy a file from XH0: to RAM:, you'll get the original.
- It's neat!
-
-
- Executables that are compressed can be run from any directory. The caveat
- here is that any files which use overlays cannot be successfully compressed
- and used - same with any of the Powerpacker and Imploder type programs.
- That means that Imagemaster CAN be crunched, but Dpaint_4 or ProDraw cannot
- be.
-
- The other thing that is a small drawback to this scheme is that I would
- like to have files automatically compressed when placed in the special XH0:
- volume, but they are not. You have to use a CLI command to crunch the
- files.
-
- I have been using XPK on my system for a few days now, and find no problems
- with it, no slowdowns, and I am generally delighted with it's performance.
- Kudos to the authors, and I look forward to more functionality in the
- future (i.e. automatic re-compession of saved files).
-
- -- Via DLG Pro v0.992
-
- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- -
- Telepro!james_hastings-trew@access.usask.ca
- "[Democratic philosphy consists of] the idea of running your paycheck
- through the salad shooter and dumping the shreds on the compost heap of
- good intentions." -P.J. O'Rourke in Bill Clinton, The Rolling Stone
- Interview
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- -
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