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Some notes on Fractal2 & Fractal3:

  Fractal2 was an attempt to see if more speed could be realized by calling the MC68881 FPU directly on the MAC II. It does make a difference. Roughly a 60% speed increase over the SANE version. The drawback is that it does not run on a "Classic" Macintosh. But I thought there was still more room for improvement. Fractal and Fractal2 both called quickdraw for each calculated point. At res=1 that is 512 calls per line. I changed the method to save a line of bits and draw it once. That decreased the time by about 50%. The trade-off is that Fractal3 will only operate in res=1 mode. Use Fractal2 for larger than res=1, where the time is not a problem. Then use Fractal3 for res=1.
     Ray Sanders  (Thanks to Doug Felt for the original idea)