On Wed, 28 Jul 2010 "O'Donnell, Dan" daniel.odonnell@uleth.ca wrote:
I'd have my doubts about ChiWriter files, though that might have been a pre-PC program for the SuperPet.
This was a popular PC program for writing scientific, especially mathematical texts:
http://www.horstmann.com/ChiWriter/
Its internal format was rather simple and easy to reverse-engineer, you can find its short description e.g. at
http://mirror.ctan.org/support/chi2tex/read.me
I should have still the C source code of a converter to TeX by Horstman
http://www.tug.org/TUGboat/Articles/tb12-3-4/tb33horstman.pdf
but the legal status of it is not clear for me. I've received it indirectly without any conditions, but later its author started to sell the program. This
http://www.ctan.org/tex-archive/support/chi2tex/
contains unfortunately only binaries (which you can however still run, at least in principle, under Free-DOS in a virtual machine).
This
http://www.ctan.org/tex-archive/support/chi2ltx/
may also be of some use.
Best regards
JSB