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Lhwarp
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1990-01-17
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lhwarp120.lzh 33280 Approx time (min): 34 at 300 baud, 9 at 1200 baud
Contributed by: svigna Date: Tue Jan 16 14:59:30 1990
LHWARP 1.20
6th January, 1990
A disk tracker for the Amiga
Written by Jonathan Forbes
Lhwarp (Pronounced L-H-WARP) is a program which will read
tracks directly from your floppy disk, compress them, and output
them to a file. The advantages of using Lhwarp are:
o The entire disk structure, including the boot block, is
preserved.
o Lhwarp will always produce a smaller output file than ARC,
ZOO or WARP.
(note: this is only true when the default compression
algorithm is used)
o Lhwarp will only archive sectors which contain data, by
using the disk's
bitmap (however, Lhwarp will gladly compress every single
sector on
the disk, if you wish.)
o Using Lhwarp is much less hassle than archiving each and
every file
individually.
o The bootblock of any disk being either read or written is
displayed, so
that bootblock viruses can easily be found.
Lhwarp will produce files much smaller than those produced by
Warp, due to the fact that Lhwarp uses a more efficient
compression algorithm (Adaptive Huffman Encoding);
In addition, Lhwarp will only archive sectors which contain
data; deleted information is not archived (unless you explicity
request this to be done.)
For those who simply must have a faster compression rate,
Lhwarp provides two additional compression algorithms; squeezing
and vaporising (the latter is the 14 bit version of UNIX
Compress.) Both are much faster than the LHARC Adaptive Huffman
Encoding algorithm (called "freezing.") However, neither of them
comes close to the compression ratio of freezing.
Keywords: $binary compression huffman lharc lzhuf tracker utility
Download count: 0
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