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- SQ version 1.5a is an experimental outgrowth of Richard
- Greenlaw's file compression utility. Note that it was
- developed by modifying SQ 1.5, not 1.6 which has been in
- the public domain for a year or so.
-
- 1.5a changes:
-
- a) Directed I/O support was removed.
-
- b) Leor Zolman's WILDEXP command-line interface was
- added. All file and output drive specifications
- are taken from the command line.
-
- c) Output file sizes are checked against input file
- sizes. If SQ finds a file which doesn't compress
- very well then it discards the output file, and,
- if the output was on a different disk from the
- input file then the input file is simply copied
- to the destination disk.
-
- d) A command-line option consisting of a single plus
- sign (+) causes SQ to ask whether or not to
- discard a poorly-compressed file.
-
- e) Files of 8 sectors or less are never squeezed.
- Even on single-density standard CP/M interchange
- disks no space saving would be realised and, when
- transferring such files by modem the saving in
- transmission time is not significant.
-
- Examples:
-
- 1 A>sq *.c *.asm
-
- squeezes all .C and .ASM files on the logged-in
- disk.
-
- 2 A>sq b: *.c *.asm
-
- same as above except that the squeezed files are
- written to the B: disk.
-
- 3 A>sq b: *.c + *.asm
-
- same again except that if a .ASM file is found not
- to compress well then SQ will ask whether or not to
- discard the output file and copy the original.
-
- 4 A>sq b: *.* !*.com
-
- squeeze all except .COM files and write the output
- files to the B: disk.
-
- Note that this IS a pre-release version of SQ. PLEASE USE
- IT AND REPORT ANY BUGS OR SUBMIT ANY SUGGESTIONS via this
- system or to
-
- John Hastwell-Batten,
- 38 Silvia St, Hornsby, NSQ 2077
- (02)477 4225 ah, (02) 239 9327 bh.
-