This list complete as of version 20. None of these are necessarily supported in future. Add one to any debug value to trigger writing benchmark values to the file "bench". This gets stripped at startup; so all values used for other purposes are even. Example: "fractint debug=90" forces Fractint to use "C" code for Mandelbrot and Julia set computations. "Fractint 91" does the same thing, but also turns on the benchmark timer. 22 lorenz.c force float for 3D perspective 50 fractint.c compare estored files 70 fractint.c set fpu = 0 72 fractint.c don't use fast >= 287 fpu routines 90 fractals.c force "C" mandel & julia code (no calcmand or calmanfp) 90 fractals.c force generic code for fn+fn etc types 90 parser.c force "C" parser code even if FPU >= 387 94 parsera.asm Use old buggy pwr() 94 mpmath_c.c Use old buggy pwr() 96 parserfp.c write debug messages to disk files(3) 98 frasetup.c Use real formula for popcorn in the old case. 110 cmdfiles.c turns off first-time initialization of variables 200 fractint.c time encoder 300 jiim.c don't use MIIM queue 322 parserfp.c disable optimizer (FPU >= 387 only) 324 realdos.c disables help ESC in screen messages 420 diskvid.c don't use extended/expanded mem (force disk) 420 memory.c same for screen save (force disk) 420 editpal.c same for screen save (force disk) 422 diskvid.c don't use expanded mem (force extended or disk) 422 memory.c same for screen save (force extended or disk) 450 fractint.c abort in batch mode if savename exists 470 calcfract.c disable prevention of color 0 for BTM 472 calcfract.c enable solid guessing at bottom and right 700-720 miscovl.c set getprec() digits variable to nn 750 miscovl.c print out as many params digits as possible in PAR 870 fractint.c set fpu to max 87 910 miscovl.c disables Sylvie Gallet's colors= color compression fix. 920 miscovl.c makes colors= compression lossless. 1010 fractals.c force fp for newton & newtbasin (no mpc math) 1012 fractals.c swap sign bit of zero for mandelbrotmix4 1234 fractint.c force larger integer arithmetic bitshift value 2222 line3d.c show amount of extra seg memory used 2224 line3d.c old just-the-dots logic, probably a temporary thing 2870 fractint.c set fpu to max 287 3000 general.asm '~' goes to color play mode 3002 realdos.c don't show development in heading 3200 fracsubr.c disable auto switch back from arbitrary precision 3400 fracsubr.c disable auto switch from integer to float 3444 calcfrac.c turns on long double soi algorithm (passes=s) 3600 miscfrac.c pins the plasma corners to 1 3800 fracsubr.c turns off grid pixel lookup 4000 miscres.c turn on math error message (off otherwise) 4010 miscres.c use pre-19.3 centermag conversion. 4020 fracsubr.c use old timer. 4030 fracsubr.c use old orbit->sound code w/integer overflow. 4200 diskvid.c sets disk video cache size to minimum 6000 frasetup turns off optimization of using realzzpower types instead of complexzpower when imaginary part of parameter is zero 8088 general.asm set cpu = 86, ie dont use 32 bit stuff 9002-9100 fractint.c reduce video_type to (debug-9000)/2 if init was higher 10000 fractint.c display cpu, fpu, and free memory at startup 10000 fractint.c ? (try extra hard for minimal startup memory?) 10000 memory.c extra sanity checks and messages <> 0 line3d.c show "normal vector" errors instead of just fixing <> 0 prompts.c show info if fullscreen_prompt2 array invalid odd cmdfiles.c sets benchmark timer flag and subtracts 1 to even integer