Tried the Fractint Patch on DosBox SVN-Daum and NO lack of memory crash. Everything works just perfectly and really fast. Here are the relevant settings I use on XP. Important is the fixed cycles amount which may be higher with faster systems and dynamic kernel allocation=false. The image, an exciting zoom, generated in hardly believable 2 min. ; core=dynamic cputype=auto cycles=fixed 205170 #cycles=max cycleup=10 cycledown=20 ignore opcode 63=true apmbios=false isapnpbios=true realbig16=falsexms=true ; ems=true umb=true umb start=0 umb end=0 dynamic kernel allocation=false keep umb on boot=false keep private area on boot=false private area in umb=true automount=true int33=true biosps2=true keyboardlayout=auto dbcs=true filenamechar=true collating and uppercase=true files=127 ; [autoexec] # Lines in this section will be run at startup. # You can put your MOUNT lines here. mount c k:\dosfiles\FRACTINT\ ; ; https://www.dropbox.com/sh/4nssoibe8t1yvpe/AAAGX7fGueqCkkKboUhT3DkKa?dl=0 ; The link also contains the "look closely" input table with the explanation how to change the default functions, 3 versions as usual. ; ---------------------------Start Par-------------------------------------- 13567-10 { ; Caleidoscope - Zoom ; Time 0.02.59.55 Reso 1280/1024 ; Used DosBox SVN Daum ; SGG051 Colormap reset=2004 type=formula formulafile=mfr_14.frm formulaname=mfr_14_2 function=ident/ident/ident/ident passes=t center-mag=-0.83011/2.61569e-013/24.19704/1/90/3.88578058618804789e-016 params=-0.05487228003784295/0.2096011230811487/13567.07595752022/12534.4\ 911030602/150512.0404808048/384.3204896048/384.00482000595/128.300768859\ 1/256.3007684001/512.2007681001 float=y maxiter=3071 inside=maxiter outside=tdis periodicity=0 rseed=-2436 colors=000ZS0<12>HC0GB0FA0<3>A60960850<3>521421312<3>103103003<3>0040050\ 05015016<3>237247348<8>BDBCECDFC<8>PQGQRGSTH<7>baKcbKdcL<3>igMjgNkhN<3>n\ kOokPplP<3>rmQrmRsmR<3>smSsmSslT<3>rkUqjUqiU<3>nfVmfVmeV<9>aVW`UW_SWYRWX\ QWWPW<9>IDWHCWFBW<3>B7VA6V95V<3>52U42U31T<3>10S10S00S<3>00R00Q00Q<3>12P1\ 2O13O<4>56M67M68M<8>GIIIJHJKH<6>TTEUUEVWD<4>a`BbaBdbB<3>hf9ig9jh8<3>nj7o\ k6pk6<3>rm5rm4sm4<4>sm3sl2sl2<3>rj1qj1qi1<11>fZ0eY0cX0<2>`T0 }