Success sort off! I did download those. But I linked with the pre made single precision package. Reading the manual more carefully reveal that there is not the complete FPMP-11 package in those pre made object files. So one have to assemble ones own version by specifying exactly which modules to include in a short file and then feed the six source file into PAL11-S. And voila a tailor made version of FPMP-11 made for SPACE WAR is produced. I then fed this object into LINK11-S followed by the 19 object files of SPACE WAR. Finishing with the POINT module. And after doing this twice I was greeted by a MODULE MAP and a 7323 byte absolute binary file! * U * E LOAD MAP TRANSFER ADDRESS: 000001 LOW LIMIT: 025562 HIGH LIMIT: 037460 ********** MODULE FPMP11 SECTION ENTRY ADDRESS SIZE <. ABS.> 000000 000000 < > 025562 000640 $ERR 026364 $ERRA 026374 $ERVEC 026414 $ICI 025570 $ICO 026074 $OCI 025562 $OCO 026066 $POLSH 026360 $V20A 026360 ********** MODULE CHAR SECTION ENTRY ADDRESS SIZE < > 026422 000246 CHAR 026422 ********** MODULE CHRTAB SECTION ENTRY ADDRESS SIZE < > 026670 000606 CHRTAB 026670 ********** MODULE COMPAR SECTION ENTRY ADDRESS SIZE < > 027476 000444 COMPAR 027476 ********** MODULE EXPLOD SECTION ENTRY ADDRESS SIZE < > 030142 000330 EXPLOD 030142 EXPREP 030260 EXPX 030266 EXPY 030270 ********** MODULE GRAVTY SECTION ENTRY ADDRESS SIZE < > 030472 000450 GRAVTY 030472 ********** MODULE MULPLY SECTION ENTRY ADDRESS SIZE < > 031142 000304 MULPLY 031142 ********** MODULE PARM SECTION ENTRY ADDRESS SIZE < > 031446 001214 PARM 031446 ********** MODULE PWRUP SECTION ENTRY ADDRESS SIZE < > 032662 000106 ********** MODULE RESET SECTION ENTRY ADDRESS SIZE < > 032770 000206 CENTER 040000 ORBIT 000400 RESET 032770 RES01 033156 ********** MODULE RKT1 SECTION ENTRY ADDRESS SIZE < > 033176 000160 RKT1 033176 ********** MODULE RKT2 SECTION ENTRY ADDRESS SIZE < > 033356 000142 RKT2 033356 ********** MODULE SCORE SECTION ENTRY ADDRESS SIZE < > 033520 000266 SCORE 033520 ********** MODULE SINCOS SECTION ENTRY ADDRESS SIZE < > 034006 000462 SINCOS 034006 ********** MODULE SLINE SECTION ENTRY ADDRESS SIZE < > 034470 000114 SLINE 034470 ********** MODULE SPCWAR SECTION ENTRY ADDRESS SIZE < > 034604 000232 ADBR 176772 ADCS 176770 AMMO 035022 ANGH1 034760 ANGH2 035006 ANGL1 034756 ANGL2 035004 ANGMID 000702 DAC0 176750 DAC1 176752 DAC2 176754 FIRE 001440 FLAG1 034736 FLAG2 034764 GAME1 035026 GAME2 035030 GRVFLG 035032 HIT1 035010 HIT2 035012 MASK 002100 PTREP 035034 RKTSIZ 007000 SHOTS1 035014 SHOTS2 035016 SPCRST 034624 SPCWAR 034604 SUNSZ 004000 TSPEED 035024 WIN 035020 XDISP1 034754 XDISP2 035002 XSIZE1 034746 XSIZE2 034774 XVELH1 034752 XVELH2 035000 XVELL1 034750 XVELL2 034776 YDISP1 034744 YDISP2 034772 YSIZE1 034734 YSIZE2 034762 YVELH1 034742 YVELH2 034770 YVELL1 034740 YVELL2 034766 ********** MODULE SUN SECTION ENTRY ADDRESS SIZE < > 035036 000304 SUN 035036 ********** MODULE UPDAT1 SECTION ENTRY ADDRESS SIZE < > 035342 000356 UPDAT1 035342 ********** MODULE UPDAT2 SECTION ENTRY ADDRESS SIZE < > 035720 000356 UPDAT2 035720 ********** MODULE POINT SECTION ENTRY ADDRESS SIZE < > 036276 001162 POINT 036276 PTNUM 036456 PASS 2 * Starting SPACE WAR (after loading the IOX-11 library) then gave this dialogue: sim> go 034604 SPACE WAR ANY CHANGES? (YES-NO) Y WANT A SUN WITH GRAVITY? (YES-NO) Y WANT REAPPEARING PHOTON TORPEDSOES? (YES-NO) Y INPUT # OF TORPEDOS RKTS WILL HAVE. STD=64 64 INPUT # OF HITS TO DESTROY A RKT STD=32 32 INPUT SPEED OF TORPEDOES. STD=16000 16000 HALT instruction, PC: 000042 (BIC R4,SP) sim> So it does run! I would guess that the lack of proper AD01 and AA11 hardware in SimH is the reason for the HALT, but it remain to be investigated! Next step is to adapt the code to the AR11 hardware in place for AD01 and AA11.