ISP program runs under dosemu on Linux

I have been reading "Space Propulsion Analysis and Design" to
understand how to calculate the ISP of a fuel combination.
I started working on some C code (see http://offshore.ai/vince/isp-c.txt)
but the numbers are not making sense yet.

I then went to http://www.dosemu.org and installed dosemu on my Linux
machine (just unzip 2 tar files with binaries) and was happy to see
that the ISP program on Bruce Dunn's site can run under dosemu on
Linux.
You can get it at http://www.dunnspace.com/isp.htm
It is interesting to run. You give it some fuel, oxidizer,
pressure, expansion ratios, it will show you ISP, the exhaust
composition, temperature, average molecular weight, etc. It will
also search for the ideal fuel/oxidizer ratio. Fun stuff.

It seems this code and other similar programs are based on a NASA
report:

Computer program for calculation of complex chemical equilibrium
compositions, rocket performance, incident and reflected shocks,
and Chapman-Jouguet detonations
Gordon, S. (NASA Lewis Research Center, Cleveland, OH, United States);
Mcbride, B. J. (NASA Lewis Research Center, Cleveland, OH, United
States)
NASA Center for AeroSpace Information (CASI)
NASA-SP-273 , 1976

There are also 2 other follow on reports:

Finite area combustor theoretical rocket performance
Gordon, Sanford (Gordon, Sanford, Cleveland, Ohio , United States);
Mcbride, Bonnie J. (NASA Lewis Research Cen
ter, Cleveland, OH, United States)
NASA Center for AeroSpace Information (CASI)
NASA-TM-100785 , 1988

Computer program for calculation of complex chemical equilibrium
compositions and applications. Supplement 1: Transport properties
Gordon, S. (Gordon (Sanford) and Associates, Cleveland, OH, United
States);
Mcbride, B. (NASA Lewis Research Center, Cleveland, OH, United
States);
Zeleznik, F. J. (NASA Lewis Research Center)
NASA Center for AeroSpace Information (CASI)
NASA-TM-86885 , 1984

All 3 of these reports can be purchased from NASA at:

http://ntrs.nasa.gov/

-- Vince