Jonathan Osuch wrote:
The only way to find out any more about what is happening is to compile the parser with the debug messages turned on. Unfortunately, this is no longer possible under DOS due to lack of memory.
Not sure I understand exactly why (in details) that it may not be compiled under DOS any longer. Mike Frazier wrote:
The last thing the parser did was calculate z. That sounds like it could be z != 0. That one also gives the correct image if you filter out the negative zeros. Maybe the FPU doesn't have those.
This is quite likely and the most logical conclusion in my experience. I remember way back when, while still programming on main frames, that some compilers would allow both positive and negative zeros. At least until they were later modified in future releases to having only one possible signed value for a zero. Sincerely, P.N.L. -------------------------------------- http://www.Nahee.com/PNL/Fractals.html http://www.Nahee.com/Fractals/