Version differences:

./mandel.asm

   Final version, saves 1024x768 BMP on exit (size can be changed by defining
   constant values).  Program can take up to several minutes to write the
   output image, depending on window range and defined resolution.


./c/*

   C implementations.  Since checking algorithm correctness is somewhat
   difficult in assembly, it was tested here before assembly versions were
   written.

./version0/mandel.*

   First version, use 64 iterations for point test, adjust grayscale color ramp
   after render.  Fast.  Does not write output file.

./alpha1/mandel.*

   Second version, use 128 iterations.  Blue color ramp replaces grayscale
   ramp.  Reasonably fast.  Does not write output file.

./alpha2/mandel.*

   Third version, adds supersampling to alpha1.  Output file is fixed at
   320x200 (direct screen dump).  Slower than alpha1, but writes output fast.