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DIFF.MSG
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1986-03-11
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History of DIFF.C
DIFF was developed by Kevin Kenny, when he was still here, on
an 8-bit CP/M system using BDS C. Later, I converted the source
to 16-bit CP/M-86 using the CP/M-86 version of Computer
Innovations C-86 C compiler. Later yet, I converted it to MS-DOS
generic using the MS-DOS version of CI C-86. Stil later yet, it
was used as a test of portablility of C source by converting it
to both Lattice and Mark Williams C. It has successfully run
under all conditions. I believe that Kevin converted it to
Waterloo C on GCOS just before he left but that source appears to
be lost.
As you can see from his copyright statement, Kevin developed
this program in 1983, if my memory serves me correctly, early
1983. It has not been functionally modified since the first
release. Kevin did release the source to the 'public domain'
through the C-Users' Group (then the BDS C-Users' Group.) His
intent, as he informed me, in copyrighting the source was to
discourage commercial use of his source in products that were
later sold.
There are two versions of the main source program in this
archive, DIFF.BDS and DIFF.C. DIFF.BDS is, I believe, Kevin's
original source as released to th C-Users's Group. DIFF.C is the
converted form for one of the 16-bit C compilers, from the '.h'
files, I would say Lattice C. The DOC file is untouched by human
hands since Kevin wrote it. I do NOT guarantee that the .EXE
file was produced from the DIFF.C file, it may well be the .EXE
file produced by the Mark Williams compiler.
DIFF has not yet been converted to Aztec C (8-bit or 16-bit),
DeSmet C, Microsoft C, MIX C, or any other 8- or 16-bit C.
Don-Willx4396