On Sun, 2005-11-27 at 14:18 -0800, David Fisher wrote:
Thank you for your response. Attached are the six fractals concerned. I tested the par files and they display on my system, the originals being created at SF7 resolution. Also attached is a copy of my fractint.cfg which might be useful. Other info possibly useful: chip: AMD 64 3200+ 1.84Ghz clock 1.00Gb ram OS: MS DOS 6.2 on removeable bootable HD. No windows present on system when fractint is running.>
What you are seeing is Fractint switching to floating point math when either the X or Y resolution is larger than 2048. Why that happens has to do with whether the pixel values are pre-generated in a grid, or the pixel values are generated on the fly. The value of 2048 was arbitrarily chosen (so it might be possible to change it) as an indication that the grid would be too large to fit into the available memory. This is memory in a specific location and of a specific size (32 Kbytes, I think), which is shared with the graphics modes. Jonathan