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DOS/32a: utility to extract Linear Compressed (LC) files? (Users)

posted by Zyzzle, 23.12.2022, 10:44

> > The sample file I'm trying to decompress is QV.EXE included in Quickview
> v.
> > 2.61 package. (This loads fine into v. 7.35 SD, but v. 9.1.2 SD refuses
> > saying it "LC files are not supported in this version). This is for sole
> > purpose of recompressing it by UPX to save much more diskspace over very
> > inefficient SC.EXE (non-LZ77 compressor).
>
> Did you already try to reach QV author Wolfgang Hesseler?
Yes, I did try successfully, and reached him a few years ago (2018 or so), and he was not interested in releasing a UPX'ed version of Quickview. Or, at least did not indicate it would be in his best interests, since it is "harder" to extract / decompress the LC executables, there being no built-in extractor. He was a very nice fellow. So, I tried -- merely for educational use, mind you, to find a way to make such version myself, since UPX (lzma compression) yields in general about ~30 to 50% smaller .EXE than the compressed files produced by DOS 32/A SC.EXE. My intention being to create very small, optimized portable DOS with Quickview player which will fit on floppy disk.

My goal merely being to create smallest-possible binaries by recompressing these LC files. Another example is the MPXPLAY.EXE executable, which is also compressed by LC.exe, and that is a totally donation-based project. I did not try contacting PDFSoft author, however.

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