From aek@apple.com Wed Jul 16 18:45 EDT 1997 Return-Path: Received: from mail-out1.apple.com by drs-esg.com (1.37.109.24/3.1.090690-DRS Electronic Systems Inc.) id AA280153150; Wed, 16 Jul 1997 18:45:50 -0400 Received: from apple.com (A17-128-100-140.apple.com [17.128.100.140]) by mail-out1.apple.com (8.8.5/8.8.5) with ESMTP id PAA28134 for ; Wed, 16 Jul 1997 15:42:02 -0700 Received: from apple.com (haxrus.apple.com [17.216.16.149]) by apple.com (8.8.5/8.8.5) with SMTP id PAA04592 for ; Wed, 16 Jul 1997 15:42:31 -0700 Date: Wed, 16 Jul 1997 15:44:28 PDT From: Al Kossow Subject: spacewar.pa To: djg@drs-esg.com X-Mailer: LeeMail 2.0.6 Message-Id: Status: RO From: Mike Umbricht To: aek@goonsquad.spies.com Message-ID: <009ADB77.70C6A9E0.5@kronos.egr-ri.ids.net> Subject: Re: pdp-8 PAL8 assembler Status: R From: aek@goonsquad.spies.com (Al Kossow) > >Could you forward a copy of this code to me? tnx.. Here is SPACE.PA I will send SPACE.CF off in another message. Enjoy, -mike ============================= cut here ===================================== / SPACE WAR / / INTERPLANETARY DEATH AND DESTRUCTION ON YOUR / LAB-8 / / EVAN SUITS / / THIS VERSION WORKS OFF EITHER THE BLUE RIBBON CONNECTOR OR THE / SR. WHEN THE PROGRAM IS STARTED (AT 0200) OR RESTARTED THE / SR WILL BE TESTED AND IF =0000 WILL BE USED FOR THE COMMAND / INPUT. OTHERWISE, THE BLUE RIBBON CONNECTOR (AX08 * C0-C7 * / XR OPTION ONLY) CONTINGENCY INPUTS WILL BE USED. / / WHEN THE PROGRAM IS STARTED THE TWO SHIPS SHOULD / APPEAR ON THE SCREEN WITH SHIP 'ONE' ON THE LEFT, SHIP / 'TWO' ON THE RIGHT. / / THE COMMAND WORD BIT ASSIGNMENTS ARE: / / SR BIT: C: FUNCTION: / / 0 0 SHIP ONE ROTATES LEFT / / 1 1 SHIP ONE ROTATES RIGHT / / 2 2 SHIP ONE ACCELERATES / / 3 3 SHIP ONE FIRES / / / / 8 4 SHIP TWO ROTATES LEFT / / 9 5 SHIP TWO ROTATES RIGHT / / 10 6 SHIP TWO ACCELERATES / / 11 7 SHIP TWO FIRES / / / / NOTE THAT TURNING RIGHT AND LEFT SIMULTANEOUSLY THROWS / THE SHIP INTO HYPERSPACE. IN THE CURRENT VERSION THE ODDS / ARE IN FAVOR OF YOUR MAKING IT BACK SAFELY. THE GAME IS OVER / WHEN ONE OR BOTH OF THE SHIPS HAVE BEEN DESTROYED AND THE / WINNER (IF ANY) IS IN NORMAL SPACE. WHEN THE WINNER / HAS BEEN ANNOUNCED, HIT ANY TTY KEY TO RESTART. / / SYMBOL DEFINITIONS FOR PAL8-PAL10 ZTEN=6342 OTEN=6344 XRIN=6331 XRCL=6334 SKXK=6321 CLXK=6352 DSB=6324 DXC=6301 DYC=6311 DXL=6302 DYL=6312 DIS=6304 CRF=6072 CCF=6052 / / THIS PROGRAM RELIES ON THE PROGRAM INTERUPT FACILITY FOR / REAL WORLD TIMING PURPOSES. / *0 0 /EFFECTIVE JMS 0 ON PROGRAM INTERUPT JMP I 2 /EXIT IMMEDIATLY TO SERVICE ROUTINE INTSER EMPTY, 0 /THESE LOCATIONS ARE RESERVED FOR ODT1, 0 /DEBUGGERS, ETC. ODT2, 0 ODT3, 0 / / ALL THE AUTO INDEX REGISTERS ARE NAMED BUT NOT ALL OF / THEM ARE USED. THE STATUS OF ANY GIVEN REGISTER CANNOT / BE DETERMINED AT ANY TIME EXCEPT BY CAREFUL INSPECTION OF / THE CODE. / *10 AUTO10, 0 AUTO11, 0 AUTO12, 0 AUTO13, 0 AUTO14, 0 AUTO15, 0 AUTO16, 0 AUTO17, 0 / / THE FOLLOWING ARE THE DATA FILES FOR THE TWO SPACE SHIPS / AS WELL AS CERTAIN OTHER PARAMETERS FOR CALCULATING POSITIONS / AND SO ON. THE ORDER OF THE LOCATIONS MUST BE PRESERVED / ALTHOUGH THE SIZE OF THE TABLES MAY BE VARIED / *20 ONEOUT, 0 /IF NON-ZERO CONTAINS REAMINING TIME OF EXPLOSION ONECNT, 0 /NUMBER OF POINTS IN FIGURE TO BE DISPLAYED ONEFLG, 0 /IN OR OUT OF NORMAL SPACE ONETHE, 0 /ANGLE OF ORIENTATION ON SCREEN ONEVEX, 0 /X COMPONENT OF VELOCITY ONEVEY, 0 /Y COMPONENT OF VELOCITY ONEPEX, 0 /X POSITION (12 BITS) ONEPEY, 0 /Y POSITION (12 BITS) ONESIN, 0 /SINE OF ANGLE ONECOS, 0 /COSINE OF ANGLE ONEFIN, 0 /SET WHEN EXPLOSION DIES OUT TWOOUT, 0 /SAME CONTENT AND ORDER TWOCNT, 0 /AS ABOVE TWOFLG, 0 TWOTHE, 0 TWOVEX, 0 TWOVEY, 0 TWOPEX, 0 TWOPEY, 0 TWOSIN, 0 TWOCOS, 0 TWOFIN, 0 / / THESE LOCATIONS ARE USED BY THE "VECTOR GENERATOR" IN / DISPLAYING THE FIGURES. A FOUR DOT VECTOR WILL BE DRAWN / FROM XONE,YONE TO XTWO,YTWO WITH STEPS OF SIZE DIXTEM,DIYTEM / XONEDS, 0 YONEDS, 0 XTWODS, 0 YTWODS, 0 DIXTEM, 0 DIYTEM, 0 DISCNT, 0 / / THE NEXT LOCATIONS ARE USED BY CALPOS TO DO A FAST / MULTIPLY TO HELP CALCULATE THE DISPLAY FILES. / T10SIN, 0 T20SIN, 0 T30SIN, 0 T10COS, 0 T20COS, 0 T30COS, 0 CALSIN, 0 CALCOS, 0 / / NOW COME THE VARIOUS ODDS AND ENDS ONE USUALLY FINDS ON / PAGE ZERO / SINE, SINEIN COSINE, COSINI MULT, MULTI RSHIFT, SHIFTR VECTOR, DISPLY CALPOS, POSCAL INTWRD, 0 INTCNT, 0 CLOCK, 0 HYPER, HYPSET MESOUT, CHARS THEADJ, THEAJI VEESCL, VEELIM ISHFT, DISHFT RESET1, RESE1 GAMOVR, 0 ACCFLG, 0 ACCPER, -30 MEXP, -400 PROX, 0 PROY, 0 PROLIF, -360 BUFTMP, 0 ONEFIL, DISBUF TWOFIL, DISBUF+40 P5, 5 P10, 10 P17, 17 P20, 20 P37, 37 P40, 40 P100, 100 P132, 132 P200, 200 P400, 400 P550, 550 P3777, 3777 M4, -4 M6, -6 M10, -10 M11, -11 M264, -264 M200, -200 M400, -400 M550, -550 / / THE PROGRAM MAY BE STARTED OR RESTARTED AT ANYTIME AT 0200. / THE DATA FILE ON PAGE ZERO IS CLEARED, ALL FLAGS INITIALIZED, / AND THE SR EXAMINED. IF THE SR=0 THE DISPLAY UPDATE ROUTINES / ARE SET TO PICK UP THE STATUS WORD FROM THE SR. IF THE SR / DOES NOT EQUAL ZERO, THE STATUS WORD IS READ FROM THE EIGHT / CONTINGENCY INPUTS ON THE BLUE RIBBON CONNECTOR OF THE AX08 / (XR OPTION ONLY). JUMP IS THEN TO THE DISPLAY / FILE UPDATE TO START OFF THE GAME. / *200 START, CLA CLL /START OR RESTART HERE ANY OLD TIME LAS /SR SNA CLA TAD SWRD /USE THE SR TAD XROPT /USE THE BLUE RIBBON CONNECTOR DCA COLDST /AND LEAVE IN THE TRAP LOCATION RESTRT, CLA CMA XRCL CLA CLL TAD P17 /FIRST CLEAR THE POSITION AND DATA DCA AUTO10 /TABLES OF THE TWO SHIPS TAD TABLEN DCA AUTO11 DCA I AUTO10 ISZ AUTO11 JMP .-2 TAD STRT1 /SET THE STARTING POSITIONS OF THE DCA ONEPEX /TWO SHIPS TAD STRT2 DCA TWOPEX TAD P37 /SET TRIG FUNCTIONS JUST IN CASE DCA ONECOS TAD P37 DCA TWOCOS /ZERO DEGREES IS POINTING STRAIGHT UP TAD ACCPER /SET COUNT FOR VELOCITY INCREASE DCA ACCFLG DCA ONEFIN /CLEAR ALL GAME END FLAGS DCA TWOFIN DCA GAMOVR JMS I BUFSET /RESET ALL PROJECTILE DISPLAY BUFFERS TAD P400 /START UP THE CRYSTAL CLOCK IN THE AX08 ZTEN OTEN TCF /CLEAR OTHER REMAINING LIKELY FLAGS PCF RRB CRF CCF CLA JMP COLDST /AND GO TO IT / / UPDATE IS REACHED WHENEVER THE PROGRAM IS STARTED OR THE / CLOCK COUNT OVERFLOWS INDICATING TIME TO RECALCULATE THE / THE DISPLAY FILES AND REFRESH THE DISPLAY. THE INTERUPT / COUNT IS RESTORED, THE STATUS WORD IS PICKED UP FROM EITHER / THE SR OR BRC, AND THE RECALCULATION PROCESS BEGUN. / UPDATE, CLA CLL /HERE ON CLOCK COUNT OVERFLOW. /START NEXT SWEEP COLDST, 0 /TRAP TO READ SR OR BRC LAS /HERE FOR SR DCA INTWRD /STORE TEMPORARILY TAD INTWRD /MASK OUT LEFTMOST 4 BITS RTR /FOR NUMBER ONE RTR AND LFTHAF DCA INTTEM /AND STORE TAD INTWRD /MASK OUT RIGHTMOST BITS FOR NUMBER TWO AND RYTHAF TAD INTTEM /ADD TOGETHER JMP .+3 /AND CONTINUE CODST, XRIN /HERE FOR BRC - PICK UP AND CLEAR XRCL DCA INTWRD /CONTINUE TAD M550 /RESTORE INTERUPT COUNT BEFORE NEXT DCA INTCNT /UPDATE ION /GET READY FOR THE NEXT CYCLE TAD ACCFLG /ALLOW VELOCITY INCREASE THIS TIME? IAC /ONLY WHEN ACCFLG=0 SMA SZA TAD ACCPER /IF ZERO, RESET COUNT DCA ACCFLG JMP I .+1 /NOW GET DOWN TO WORK. ONEUP BUFSET, SETBUF TABLEN, AUTO17-CALCOS INTTEM, 0 LFTHAF, 0360 RYTHAF, 0017 STRT1, 1000 STRT2, -1000 SWRD, 2000-CODST XROPT, JMP CODST / / THIS IS THE INTERUPT SERVICE ROUTINE. MOST OF THE / INTERUPTS WILL BE FROM THE CRYSTAL CLOCK WHICH WILL BE / COUNTED AND UNLESS THE COUNT OVERFLOWS THE INTERUPT IS / DISMISSED IMMEDIATLY. IF THE COUNT OVER FLOWS, JMP IS TO / UPDATE WITH IOF. / / SPECIAL CASE IS KEYBOARD INTERUPT WHEN THE GAMOVR FLAG IS / SET IN WHICH CASE THE GAME IS RESTARTED. / / UNEXPECTED INTERUPTS ARE COUNTED AND AFTER ENOUGH OF THEM / HAPPEN THE PROGRAM HALTS. IF THIS HAPPENS RELOAD OR FIND THE / STRANGE FLAG / INTSER, DCA INTACC /HERE RIGHT AFTER INTERUPT - STORE RAR /AC AND LINK DCA INTLNK /FOR POSSIBLE CONTINUATION SKXK /WAS IT THE CRYSTAL CLOCK? JMP INTBUS /NO TRY SOMETHING ELSE CLXK /YES CLEAR THE FLAG ISZ CLOCK /AND BUMP CLOCK COUNTER NOP /IGNORE OVERFLOW ISZ INTCNT /TIME FOR AN UPDATE? JMP INTRET /NO, DISMISS THE INTERUPT JMP UPDATE /YES, GO TO IT INTBUS, KSF /HERE ON NON-CLOCK INTERUPT JMP .+5 /NOT THE KEYBOARD KCC /CLEAR KEYBOARD FLAG TAD GAMOVR /IS THE GAMEOVER SZA CLA JMP RESTRT /YES, RESTART TCF /NO, HELL WITH IT ISZ INTGLH /COUNT ONE BADDIE SKP HLT /HALT IF TOO MANY BADDIES INTRET, CLA CLL /HERE TO DISMISS THE INTERUPT TAD INTLNK RAL TAD INTACC ION JMP I 0 INTACC, 0 INTLNK, 0 INTGLH, 0 / / NOW BEGINS THE GREAT UPDATE PROCEEDURE, FIRST FOR SHIP / NUMBER ONE (THE DELTA SHAPED SHIP WHICH APPEARS ON / THE LEFT AT THE START OF THE GAME). IF ALIVE THE STATUS / WORD (INTWRD) IS TESTED FOR REQUESTS FOR LEFT TURN, / RIGHT TURN, THRUST ON, AND LAUNCH PROJECTILE. THESE ACTIONS / MAY OR MAY NOT BE ACTED UPON DEPENDING ON COUNTS AND FLAGS. / WHEN THIS IS COMPLETE THE SAME OPERATION IS PERFORMED FOR / NUMBER TWO. / *400 ONEUP, TAD ONEFLG /FIRST SEE IF IT'S IN NORMAL SPACE SNA JMP ONEOK /YES IT IS IAC /NO, BUT IS IT JUST COMING OUT? SNA TAD ONEFIN /YES, THROW BACK IN IF ALREADY DESTROYED DCA ONEFLG /OTHERWISE JUST COUNT ONE JMP I ITWOUP /AND GO TO FIX UP NUMBER TWO ONEOK, TAD ONEOUT /IN NORMAL SPACE - IS IT EXPLODING? SZA CLA JMP ONEFIG /IF YES, ALLOW NO CONTROLS TAD TWOFIN /HAS THE ENEMY BEEN VANQUISHED? SZA CLA JMS I ONEWN /YES, SIGNAL VICTORY TAD INTWRD /NOW BEGIN TEST OF REQUEST AND OP300 /LEFT AND RIGHT TURN TOGETHER MEAN HYPERSPACE! TAD OM300 /TEST BITS 4 AND 5 SZA CLA JMP ONELEF /NOPE, CONTINUE CMA /YES, CALL HYPER WITH AC=-1 FOR NUMBER ONE JMP I HYPER ONELEF, TAD INTWRD /REQUEST FOR LEFT TURN? AND P200 /TEST BIT 4 SNA CLA JMP ONERYT /NO CLA CLL CMA /YES DECREMENT ANGLE JMP ONEFIG ONERYT, TAD INTWRD /HOW ABOUT RIGHT TURN AND P100 /TEST BIT 5 SZA CLA IAC /YES, INCREMENT ANGLE ONEFIG, TAD ONETHE /PICK UP AND ADJUST ANGLE (MAYBE) JMS I THEADJ /BRING BACK WITHIN LIMITS OF TRIG FUNCTIONS DCA ONETHE /AND STORE TAD ONETHE /FIND THEM TRIG FUNCTIONS JMS I SINE /AND STORE ONCE AND FOR ALL DCA ONESIN /IN THE APPROPRIATE PLACES TAD ONETHE JMS I COSINE DCA ONECOS TAD ONEOUT /DO NOT ALLOW THRUST IF EXPLODING SZA CLA JMP ONEVEL ONEMOV, TAD ACCFLG /ALLOW ANY VELOCITY INCREASE THIS CYCLE? SZA CLA JMP ONEVEL /NOPE TAD INTWRD /YES, ANY REQUESTED? AND P40 /TEST BIT 6 SNA CLA JMP ONEVEL /NONE REQUESTED TAD ONECOS /YES, ADD IN VELOCITY INCREMENT DEPENDING TAD ONEVEY /ON ORIENTATION JMS I VEESCL /BUT DO NOT ALLOW TO EXCEED MAXIMUM DCA ONEVEY /AND STORE TAD ONESIN /DO THE SAME FOR THE OTHER (X) COMPONENT TAD ONEVEX JMS I VEESCL DCA ONEVEX ONEVEL, TAD ONEVEX /NOW UPDATE THE POSITION WITH THE JMS I ISHFT /VELOCITY COMPONENTS DIVIDED BY 4 JMS I ISHFT /THIS MAINTAINS MAXIMUM RESOLUTION TAD ONEPEX DCA ONEPEX /IGNORE ANY OVERFLOW TAD ONEVEY /DO THE SAME FOR Y COORDINATE JMS I ISHFT /AND VELOCITY COMPONENT JMS I ISHFT TAD ONEPEY DCA ONEPEY TAD ONEOUT /DO NOT ALLOW PROJECTILE LAUNCH IF SZA CLA /EXPLODING JMP I ITWOUP ONELNC, TAD LNC1FG /OTHERWISE, SEE IF RELOAD IS FINISHED SNA CLA JMP .+3 ISZ LNC1FG /NO, CONTINUE RELOADING JMP I ITWOUP /AND EXIT TAD INTWRD /YES, READY TO LAUNCH, TRIGGER BEEN PULLED? AND P20 /TEST BIT7 SNA CLA JMP I ITWOUP /NO, WAIT FOR A BETTER SHOT /.....I GUESS..... TAD PROLIF /YES, SET CYCLE COUNT FOR THIS LAUNCH DCA I AUTO16 /AUTO16 ALWAYS POINTS AT THE NEXT SLOT IN THE FILE TAD ONEVEX /ADD SHIPS VELOCITY (SCALED OF COURSE) JMS I ISHFT /TO ORIENTATION TO EXTABLISH X VELOCITY JMS I RSHIFT /COMPONENT OF PROJECTILE TAD ONESIN JMS I RSHIFT /AND STICK IT IN THE FILE DCA I AUTO16 TAD ONESIN /MOVE THE LAUNCH POINT OUTSIDE THE CLL RTL /SHIP OF ORIGIN TAD ONEPEX DCA I AUTO16 /AND STORE X POSITION TAD ONEVEY /NOW DO THE SAME FOR THE Y VELOCITY AND JMS I ISHFT /POSITION JMS I RSHIFT TAD ONECOS JMS I RSHIFT DCA I AUTO16 TAD ONECOS CLL RTL TAD ONEPEY DCA I AUTO16 TAD M200 /START RELOAD CYCLE DCA LNC1FG JMS I RESET1 /RESET AUTO16 TO NEXT HOLE JMP I .+1 /NOW TO FIX IT UP WITH NUMBER TWO ITWOUP, TWOUP LNC1FG, 0 /PROJECTILE LAUNCH ENABLE OP300, 300 /HYPERSPACE REQUEST CODE BITS 4 AND 5 OM300, -300 ONEWN, ONEWIN /POINTER TO VICTORY MESSAGE / / HERE BEGINS THE UPDATE PROCEEDURE FOR SHIP NUMBER TWO. / OPERATION IS THE SAME AS FOR NUMBER ONE ABOVE. / *600 TWOUP, TAD TWOFLG /FIRST SEE IF IT'S IN NORMAL SPACE SNA JMP TWOOK /YES, CONTINUE IAC /NO, BUMP COUNT AND TEST FOR REENTRY SNA TAD TWOFIN /IF RE-ENTERING THROW BACK OUT IF FINISHED DCA TWOFLG /AND CONTINUE JMP I IONEST TWOOK, TAD TWOOUT /HERE WHEN READY TO UPDATE IN NORMAL SPACE SZA CLA /IS IT EXPLODING? JMP TWOFIG /YES DO NOT ALLOW HYPERSPACE TAD ONEFIN /DID WE JUST WIN? SZA CLA JMS I TWOWN /YES ENABLE END OF GAME MESSAGE TAD INTWRD /TEST FOR HYPERSPACE REQUEST AND OP14 TAD OM14 /BITS 8 AND 9 MUST BE SET SNA CLA JMP I HYPER /8 AND 9 SET. ENTER HYPER ROUTINE WITH AC=0 /FOR SHIP NUMBER 2 TWOLEF, TAD INTWRD /TEST FOR LEFT TURN - BIT 8 AND P10 SNA CLA JMP TWORYT /NOT SET CLA CLL CMA /SET, DECREMENT TWOTHE BY 1 DEGREE JMP TWOFIG /SKIP TEST FOR RIGHT TURN TWORYT, CLA CLL IAC RTL /TEST FOR RIGHT TURN - BIT 9 AND INTWRD SZA CLA IAC /IF SET INCREMENT TWOTHE BY 1 DEGREE TWOFIG, TAD TWOTHE /UPDTAE TWOTHE JMS I THEADJ /BRING TO WITHIN LIMITS OF SINE,COSINE DCA TWOTHE /AND STORE TAD TWOTHE JMS I SINE /CALCULATE SINE AND COSINE FUNCTIONS DCA TWOSIN /AND STORE IN DATA TABLE TAD TWOTHE JMS I COSINE DCA TWOCOS TAD TWOOUT /DO NOT ALLOW VELOCITY CHANGE IF EXPLODING SZA CLA JMP TWOVEL TWOMOV, TAD ACCFLG /NOW FOR ACCELERATION. TEST TO SEE IF ALLOWED SZA CLA /DURING THIS UPDATE CYCLE JMP TWOVEL /NOPE CLL IAC RAL /YES, TEST FOR BIT 2 SET AND INTWRD SNA CLA JMP TWOVEL /NOT SET TAD TWOSIN /UPDATE X VELOCITY COMPONENT BY SINE OF TAD TWOVEX /ANGLE OF ORIENTATION JMS I VEESCL /AND SCALE TO NOT EXCEED MAX DCA TWOVEX /UPDATE Y COMPONENT WITH COSINE TAD TWOCOS TAD TWOVEY JMS I VEESCL DCA TWOVEY TWOVEL, TAD TWOVEX /NOW UPDATE THE POSITION WITH THE VELOCITY JMS I ISHFT /COMPONENTS/16 JMS I ISHFT TAD TWOPEX DCA TWOPEX TAD TWOVEY JMS I ISHFT JMS I ISHFT TAD TWOPEY DCA TWOPEY TAD TWOOUT SZA CLA JMP I IONEST TWOLNC, TAD LNC2FG /NOW CHECK FOR PROJECTILE LAUNCH. FIRST SNA CLA /TEST TO SEE IF RELOAD COMPLETE JMP .+3 ISZ LNC2FG /NO, COUNT ONE CYCLE AND EXIT JMP I IONEST IAC /YES, TEST TRIGGER BIT 11 AND INTWRD SNA CLA JMP I IONEST /NOT SET, HELL WITH IT TAD PROLIF /OK, SET PROJECTILE LIFE DCA I AUTO16 /AUTO16 IS ALWAYS POINTING AT THE NEXT SLOT TAD TWOVEX /ADD SHIPS VELOCITY JMS I ISHFT /(ADJUSTED) JMS I RSHIFT TAD TWOSIN /TO THAT OF PROJECTILE - AGAIN X COMPONENT JMS I RSHIFT /FROM SINE OF ANGLE OF ORIENTATION DCA I AUTO16 TAD TWOSIN /SET INITIAL POSITION TO BE JUST AHEAD CLL RTL /OF THE SHIP TAD TWOPEX /X COMPONENT DCA I AUTO16 TAD TWOVEY /NOW THE Y COMPONENTS FROM Y VELOCITY JMS I ISHFT /Y POSITION AND COSINE JMS I RSHIFT TAD TWOCOS JMS I RSHIFT DCA I AUTO16 TAD TWOCOS CLL RTL TAD TWOPEY DCA I AUTO16 TAD M200 DCA LNC2FG /200 CYCLES OF RELOAD JMS I RESET1 /DRINK LEADEN DEATH, NUMBER ONE! JMP I .+1 /FINAL EXIT TO DISPLAY FILE CALCULATIONS IONEST, ONESET LNC2FG, 0 /RELOAD COUNT OP14, 14 /HYPERSPACE CODE OM14, -14 TWOWN, TWOWIN / / HERE BEGINS THE DISPLAY CALCULATIONS FOR THE TWO SHIPS. AT / THIS POINT ONLY THE POSITION AND ORIENTATION OF EACH VESSEL / IS ONF INTEREST SINCE THE VELOCITY AND ALL THAT HAVE ALREADY / BEEN TAKEN CARE OF. FOR THE BOTH SHIPS THE DISPLAY FILES ARE / CALCULATED AS A SERIES OF PAIRS OF X,Y COORDINATES. BETWEEN / EACH PAIR OF POINTS A FOUR POINT VECTOR WILL BE DRAWN. THE / ACTUAL COORDINATES ARE CALCULATED AS DISPLACEMENTS / FROM THE CENTRAL PSOTION OF THE SHIP, TAKING INTO ACCOUNT THE / ANGLE OF ORIENTATION. THE FORMULAS FOLLOWED ARE: / / X(POINT)=X(BASE)+X(REL)*COS[THE]+Y(REL)*SINE[THE] / / Y(POINT)=Y(BASE)+Y(REL)*COS[THE]-X(REL)*SINE[THE] / / WHERE SINE[THE] AND COS[THE] ARE THE FUNCTIONS OF THE / ANGLE OF ORIENTATION, X(BASE) AND Y(BASE) ARE THE / COORDINATES OF THE SHIPS POSITION AND X(REL) AND Y(REL) / CORRESPOND TO DISPLACEMENT PAIRS DEPENDING ON THE SHAPE / OF THE FIGURE. ALL X AND Y RELS LIE WITHIN THE RANGE 0-3 AND / THERE FORE ALL NECESSARY DISPLACEMENTS FROM BASE COORDINATES / MAY BE CALCULATEDFROM DIFFERENT COMBINATIONS OF T10SIN, T20COS / ETC. THESE VALUES ARE CALCULATED BY A CALL TO POSCAL WITH THE SINE / AND COSINE OF THE ANGLE OF INTEREST IN CALSIN AND CALCOS. / / FOLLOWING THIS METHOD ANY FIGURE DESCRIBABLE WITH A 7 BY 7 / MATRIX OF POINTS MAY BE QUICKLY CALCULATED. / / BEGINNING AT ONESET DIFFERENT DISPLACEMENT PAIRS ARE CALCULATED / AND DEPOSITIED THROUGH AUTO10 TO FORM THE DISPLAY FILE FOR SHIP NUMBER ONE. / *1000 ONESET, CLA CLL /BEGIN DISPLAY FILE FOR NUMBER ONE TAD ONEFLG /DONT BOTHER IF NOT IN NORMAL SPACE SZA CLA JMP I ITWOST TAD ONESIN /SET UP FOR MATRIX COMPONENT CALCULATIONS DCA CALSIN TAD ONECOS DCA CALCOS JMS I CALPOS /CALL THE CALCULATOR / / CONSIDER THE 7 BY 7 MATRIX OF DISPLACEMENT POINTS WITH THE / CENTER AT 0,0 CORRESPONDING TO THE SHIPS POSITION. A SERIES / OF POINTS IS NOW DESCRIBED AROUND THIS CENTER USING THE / MULTIPLES OF THE TRIG FUNCTIONS JUST CALCULATED / SO THAT ANY POINT ON THE OUTLINE IS DESCRIBABLE AS X,Y / DISPLACED BY X,Y OF THE SHIP ITSELF / TAD ONEFIL /SET UP AUTO10 AS THE DISPLAY FILE DCA AUTO10 /POINTER TAD ONEPEX /THE FIRST POINT OF THE OUTLINE IS TAD T30SIN DCA I AUTO10 / 0,3 OR TOP CENTER TAD ONEPEY TAD T30COS DCA I AUTO10 TAD T10COS CIA /THE SECOND IS TAD ONEPEX DCA I AUTO10 / -1,0 TAD T10SIN /OR JUST LEFT OF DEAD CENTER TAD ONEPEY /AND SO ON DCA I AUTO10 TAD T30SIN TAD T30COS /THE THIRD POINT IS CIA TAD ONEPEX / -3,-3 DCA I AUTO10 TAD T30COS /OR BOTTOM LEFT HAND CORNER CIA TAD T30SIN TAD ONEPEY DCA I AUTO10 TAD T10SIN CIA /FOURTH POINT TAD ONEPEX DCA I AUTO10 / 0,-1 TAD T10COS CIA /OR JUST BELOW CENTER TAD ONEPEY DCA I AUTO10 FLAM1, TAD INTWRD /TEST FOR POWER ON. IF ON, DRAW THE AND P40 /FLAME WITH AN EXTRA POINT SOME SNA CLA /DISTANCE DIRECTLY BELOW THE SHIP JMP ONECON /POWER NOT ON - CONTINUE TAD ONEOUT /DO NOT ALLOW IF EXPLODING SZA CLA JMP ONECON TAD ONFG1 /USE ONFG1 TO TURN THE FLAME ON AND SNA /OFF TO MAKE IT FLICKER. DISPLAY THE CLA CLL CMA RAL /FLAME ONE TIME OUT OF THREE DCA ONFG1 ISZ ONFG1 JMP ONECON /ONE OUT OF THREE TIMES THIS WILL SKIP TAD ONFG2 /VARY ALSO THE LENGHT OF THE FLAME CMA /WITH LONG SHORT LONG SHORT DCA ONFG2 TAD ONFG2 /TIP OF FLAME AT EITHER SNA CLA TAD T10SIN / 0,-4 OR TAD T30SIN / 0,-3 CIA TAD ONEPEX DCA I AUTO10 TAD ONFG2 SNA CLA TAD T10COS TAD T30COS CIA TAD ONEPEY DCA I AUTO10 TAD T10SIN CIA TAD ONEPEX /RETURN DISPLAY TO 0,-1 DCA I AUTO10 TAD T10COS CIA TAD ONEPEY DCA I AUTO10 CLA CLL CMA RAL /ADD -2 TO POINT COUNT ONECON, TAD M6 /SET POINT COUNT TO -6 OR -8 DCA ONECNT TAD T30SIN /CONTINUE WITH DISPLAY FILE - THIS POINT CIA TAD T30COS / AT 3,-3 TAD ONEPEX / DCA I AUTO10 /OR LOWER RIGHT HAND CORNER TAD T30SIN TAD T30COS CIA TAD ONEPEY DCA I AUTO10 TAD T10COS /NEXT TAD ONEPEX / DCA I AUTO10 / 1,0 TAD T10SIN / CIA / OR JUST RIGHT OF CENTER TAD ONEPEY DCA I AUTO10 TAD T30SIN /FINALLY BACK TO TAD ONEPEX / DCA I AUTO10 / 0,3 TAD T30COS / TAD ONEPEY / TOP CENTE DCA I AUTO10 JMP I ITWOST /NOW FOR NUMBER TWO ITWOST, TWOSET ONFG1, 0 /USED TO COUNT FLICKERS ONFG2, 0 /SHORT OR LONG FLAG / / HERE BEGINS THE DISPLAY FILE GENERATOR FOR SHIP TWO. / IT WORKS JUST LIKE THE ONE FOR NUMBER ONE BUT WITH / DIFFERENT DISPLACEMENT PAIRS AND TWO EXTRA POINTS / *1200 TWOSET, CLA CLL /DONT BOTHER IF NOT IN NORMAL SPACE TAD TWOFLG SZA CLA JMP I IFILDS TAD TWOSIN /SET UP TO HAVE DISPLACEMENT INCREMENTS DCA CALSIN /CALCULATED TAD TWOCOS DCA CALCOS JMS I CALPOS TAD TWOFIL /SET AUTO10 TO POINT TO SECOND DISPLAY DCA AUTO10 /FILE TAD T30SIN /FIRST POINT AT TAD TWOPEX / DCA I AUTO10 / 0,3 TAD T30COS / TAD TWOPEY / OR TOP CENTER DCA I AUTO10 TAD T20COS CIA TAD T20SIN TAD TWOPEX DCA I AUTO10 TAD T20SIN TAD T20COS /SECOND POINT TAD TWOPEY / -2,2 DCA I AUTO10 TAD T20COS /THIRD POINT CIA / -2,0 TAD TWOPEX DCA I AUTO10 TAD T20SIN TAD TWOPEY DCA I AUTO10 TAD T20COS TAD T30SIN CIA TAD TWOPEX /FOURTH POINT DCA I AUTO10 / -2,-3 TAD T30COS CIA TAD T20SIN TAD TWOPEY DCA I AUTO10 TAD T20SIN CIA /NEXT TAD TWOPEX / 0,-2 DCA I AUTO10 TAD T20COS CIA TAD TWOPEY DCA I AUTO10 FLAM2, CLA CLL IAC RAL /NOW THE FLAME BIT. CHECK FOR POWER ON AND INTWRD SNA CLA JMP TWOCON /NO, FORGET IT TAD TWOOUT /NOT ALLOWED IF EXPLODING SZA CLA JMP TWOCON TAD TWFG1 /SET THE 1-3 FLICKER AS WITH #1 SNA CLA CLL CMA RAL DCA TWFG1 ISZ TWFG1 /ALSO THE LENGHT VARIATION JMP TWOCON TAD TWFG2 /EVERY OTHER TIME LONG CMA DCA TWFG2 /FLAME TIP AT EITHER TAD TWFG2 / 0,-3 SNA CLA /OR TAD T20SIN / 0,-5 TAD T30SIN CIA TAD TWOPEX DCA I AUTO10 TAD TWFG2 SNA CLA TAD T20COS TAD T30COS CIA TAD TWOPEY DCA I AUTO10 TAD T20SIN /NOW BACK UP TO THE SHIP CIA TAD TWOPEX DCA I AUTO10 TAD T20COS CIA TAD TWOPEY DCA I AUTO10 CLA CLL CMA RAL /ADD -2 TO POINT COUNT TWOCON, TAD M10 /SET POINT COUNT TO -8 OR -10 DCA TWOCNT TAD T30SIN /CONTINUE WITH DISPLAY FILE CIA /NEXT POINT AT 2,-3 TAD T20COS TAD TWOPEX DCA I AUTO10 TAD T30COS TAD T20SIN CIA TAD TWOPEY DCA I AUTO10 TAD T20COS /NEXT POINT TAD TWOPEX / DCA I AUTO10 / 2,0 TAD T20SIN CIA TAD TWOPEY DCA I AUTO10 TAD T20COS /AND THE NEXT AT TAD T20SIN TAD TWOPEX / 2,2 DCA I AUTO10 TAD T20SIN CIA TAD T20COS TAD TWOPEY DCA I AUTO10 TAD T30SIN TAD TWOPEX DCA I AUTO10 TAD T30COS /AND THE LAST AT TAD TWOPEY / DCA I AUTO10 / 0,3 JMP I IFILDS /NOW TO DISPLAY THE WHOLE MESS IFILDS, FILDIS TWFG1, 0 /FLIK THE FLAME TWFG2, 0 /LONG OR SHORT / / HERE TO DISPLAY THE TWO SHIPS. CHECK FIRST FOR COLLISION / AND THEN SET THE TWO PAIRS OF COORDENATES FOR THE END / POINTS AND CALL THE "VECTOR GENERATOR" TO DRAW THE DOTS / IN BETWEEN. WHEN THE COUNT OVERFLOWS DO THE SAME FOR / NUMBER TWO. THEN EXIT TO DISPLAY ALL THE PROJECTILES. / *1400 FILDIS, CLA CLL /ALL SET TO GO JMS I COLIDE /TEST FOR COLLISION FIRST DSB 1 /IF NO COLLISION TAD ONEFLG /SKIP NUMBER ONE IF NOT IN NORMAL SZA CLA /SPACE JMP TWODIS TAD ONEFIL /SET UP POINTERS TO DISPLAY FILE DCA AUTO10 /FOR NUMBER ONE TAD ONECNT /ALONG WITH VECTOR COUNT DCA AUTO11 TAD I AUTO10 /SET OUT THE FIRST POINT PAIR DCA XONEDS TAD I AUTO10 DCA YONEDS TAD ONEOUT /NORMAL DISPLAY OR EXPLOSION? SZA CLA JMP I IONEEX /GO ELSE WHERE FOR EXPLOSION FILONE, TAD I AUTO10 /STEP TO NEXT PAIR OF POINTS DCA XTWODS /SET X AND Y TO NEW POINT TAD I AUTO10 DCA YTWODS JMS I VECTOR /CALL THE DOT DRAWING MACHINE ISZ AUTO11 SKP /COUNT JMP TWODIS /DO NUMBER TWO ON OVERFLOW TAD XTWODS /SWAP POINTS FOR NEXT PAIR DCA XONEDS TAD YTWODS /THE GENERATOR DRAWS FROM ONE DCA YONEDS /TOWARDS TWO JMP FILONE TWODIS, TAD TWOFLG /HERE TO DO NUMBER TWO SZA CLA /BUT NOT IF IN HYPER SPACE JMP I IPRODS TAD TWOFIL /SET UP FILE POINTER AS IN ONE DCA AUTO10 TAD TWOCNT /AND THE COUNT DCA AUTO11 TAD I AUTO10 /I SUPPOSE THIS COULD BE A SUBROUTINE TOO DCA XONEDS TAD I AUTO10 DCA YONEDS TAD TWOOUT /IS IT EXPLODING? SZA CLA JMP I ITWOEX /YES, HOW EXCITING TWDLOP, TAD I AUTO10 /NO HOW DULL, STICK IN NEXT PAIR OF DCA XTWODS /POINTS TAD I AUTO10 DCA YTWODS /AND CALL THE VECTOR SEQUENCE JMS I VECTOR ISZ AUTO11 JMP .+3 JMP I .+1 /WHEN COUNT OVERFLOWS GO ON TO IPRODS, PRODIS /DO THE PROJECTILE THING TAD XTWODS /OTHERWISE SWAP ON TO THE NEXT PAIR DCA XONEDS /OF POINTS TAD YTWODS DCA YONEDS JMP TWDLOP COLIDE, COLLID IONEEX, ONEEXP ITWOEX, TWOEXP / / THIS IS THE SO CALLED "VECTOR GENERATOR" WHICH DRAWS A / SERIES OF DOTS FROM XONEDS,YONEDS TO XTWODS,YTWODS. / THE COORDINATE COMPONENTS ARE DIVIDED INTO FOURTHS AND / FOUR DOTS DRAWN ON THE SCOPE SCREEN. NOTE THAT NO DOT / IS DRAWN AT XONEDS,YONEDS. THIS IS COMPENSATED FOR ELSEWHERE. / DISPLY, 0 /ENTER TO DRAW A FOUR POINT VECTOR TAD XONEDS /FROM XONEDS,YONEDS CIA /TO XTWODS,YTWODS TAD XTWODS /DIVIDE COORDINATE DIFERENCES INTO JMS DISHFT /FOURTHS DCA DIXTEM /AND STORE INCREMENT TAD YONEDS CIA TAD YTWODS JMS DISHFT DCA DIYTEM TAD M4 /FOR FOUR DOTS DCA DISCNT DISLOP, TAD XONEDS /ADD INCREMENT TO CURRENT X AND Y TAD DIXTEM DCA XONEDS /NOTE THAT THIS ROUTINE DESTROYS TAD YONEDS /XONEDS AND YONEDS TAD DIYTEM DCA YONEDS TAD XONEDS RTR /DIVIDE BY 8 TO FIT SCREEN SIZE RAR DXC DXL /SET X VALUE CLA TAD YONEDS /DO THE SAME FOR Y RTR RAR DYC DYL DIS /AT LAST SOMETHING TO SEE!! CLA ISZ DISCNT /DONE YET? JMP DISLOP /NOPE JMP I DISPLY /YUP DISHFT, 0 /A GENERALIZED SHIFT ROUTINE CALLED CLL /FROM EVERYWHERE TO DIVIDE THE SPA /AC BY FOUR WITH AN ASR RIGHT CML IAC /NOTE THAT NEGATIVE NUMBERS ARE RAR /ROUNDED UPWARDS (TOWARD ZERO) CLL /TO MAKE IT COME OUT RIGHT SPA CML IAC /EVEN SO THERE ARE SOME ROUNDING ERRORS RAR /SOMEWHERE. SO MUCH FOR 12 BIT MACHINES JMP I DISHFT / / HERE TO DISPLAY ALL THE PROJECTILES AND TEST FOR HITS. / THE PROJECTILE DISPLAY FILE IS SEARCHED FOR PROJECTILES WITH / NON-ZERO COUNTS AND WHEN ONE IS FOUND THE POSITION IS / UPDATED BY THE VELOCITY, THE POINT DISPLAYED AND TESTED FOR / A HIT. / *1600 PRODIS, CLA CLL / BEGIN DISPLAY OF THE PROJECTILES TAD BUFST /POINT TO BEGINNING OF DISPLAY FILE DCA BUFTMP DSB 2 /SET EXTRA BRIGHT FOR SINGLE POINTS PROLOP, TAD I BUFTMP /PICK UP NEXT COUNT SNA JMP EXPIRE /THIS ONE IS DEAD - GO TO THE NEXT IAC /INCREMENT COUNT AND REPLACE DCA I BUFTMP ISZ BUFTMP /BUMP POINTER TO X VELOCITY TAD I BUFTMP ISZ BUFTMP /THEN TO XPOSITION AND UPDATE X POSITION TAD I BUFTMP /WITH THE VELOCITY WHICH IS CONSTANT DCA I BUFTMP TAD I BUFTMP DCA PROX /AND STORE X POSITION FOR DISPLAY AND TEST ISZ BUFTMP /NOW TO Y POSITION AND VELOCITY TAD I BUFTMP ISZ BUFTMP TAD I BUFTMP /SAME LITTLE GAME DCA I BUFTMP TAD I BUFTMP DCA PROY /STORE THE NEW Y VALUE TAD PROX /DISPLAY THE POINT WITH RTR /THE SAME SHIFT AS FOR THE SHIPS RAR /FOR THE SMALL SCREEN DXC DXL CLA TAD PROY RTR / RAR DYC DYL DIS /THERE IT IS!! CLA JMS I CHKOUT /TEST FOR A HIT ISZ BUFTMP /MOVE POINTER ON AND TEST FOR END TAD BUFTMP /OF BUFFER TAD BUFLIM SZA CLA JMP PROLOP /NOT AT END - CONTINUE / / HERE AT THE END OF THE PROJECTILE DISPLAY. IF THE GAMOVR / FLAG IS SET, GO ON TO THE MESSAGE DISPLAY - VICTORY LAP / SECTION. OTHERWISE PICK UP THE REMAINING CLOCK COUNT / TO GIVE THE FANS SOMETHING TO LOOK AT, AND MOVE THE / ELECTRON BEAM TO A LOWER CORNER. THE COUNT DISPLAYED / IN THE AC IS THE NUMBER OF 100 USEC CLOCK TICKS REMAINING / WHEN THIS CODE IS REACHED BEFORE THE NEXT UPDATE WOULD / BEGIN. TURNS OUT THAT ROUGHLY 2/3 OF THE CPU IS LEFT / OVER SHOULD ANYONE WANT TO DO ANYTHING VERY FANCY. / FINISH, TAD GAMOVR /IS THIS THE VICTORY LAP OR WHAT? SZA CLA JMP I ENDGAM /YES, GO TO PUT UP THE MESSAGE TAD M400 /MOVE THE BEAM OFF SCREEN DYC DYL CLA CLL DXC DXL TAD INTCNT /PICK UP THE COUNT CIA JMP . ENDGAM, JOBLOP EXPIRE, TAD BUFTMP /HERE TO ADVANCE THE BUFFER TAD P5 /POINTER TO THE NEXT PROJECTILE DCA BUFTMP /UNLESS THE END TAD BUFTMP /OF THE BUFFER TAD BUFLIM /IS REACHED SZA CLA /IN WHICH CASE JMP PROLOP /IT JMP FINISH /QUITS BUFST, DISBUF+101 BUFLIM, -DISBUF-175 CHKOUT, CHECK RESE1, 0 /THIS IS CALLED TO SET THE POINTER TAD MRES /(AUTO16) TO THE NEXT FREE SLOT DCA RESCNT /FOR A PROJECTILE LAUNCH. 12 POSSIBLE RESLOP, TAD RESPNT /MOVE THE POINTER TO THE NEXT SLOT TAD P5 DCA RESPNT TAD RESPNT /RESTE IF AT END OF BUFFER TAD BUFLIM SZA CLA JMP RESCON TAD BUFST DCA RESPNT RESCON, TAD I RESPNT /FIND A HOLE YET? SNA CLA JMP RESFND /YES, SET UP AUTO16 ISZ RESCNT /NO COUNT JMP RESLOP /AND TRY AGAIN HLT /NO HOLES AT ALL? RESFND, CMA /BACK THE POINTER FOR AUTO INDEXING TAD RESPNT DCA AUTO16 JMP I RESE1 MRES, -14 RESCNT, 0 RESPNT, 0 SETBUF, 0 CMA /THIS ROUTINE IS CALLED FROM THE TAD BUFST /STARTING SEQUENCE TO INITIALIZE ALL DCA AUTO16 /THE BUFFER POINTERS AND SO ON TAD BUFST DCA BUFTMP TAD BUFST DCA RESPNT TAD BUFST DCA SETPNT SETLOP, DCA I SETPNT ISZ SETPNT TAD SETPNT TAD BUFLIM SZA CLA JMP SETLOP JMP I SETBUF SETPNT, 0 / / THIS HERE NOW THING CHECKS THE COORDINATES OF THE MOST RECENTLY / DISPLAYED PROJECTILE AGAINST THOSE OF THE SHIPS ON THE SCREEN. / IF WITH A COLLISION LIMIT A HIT IS RECORDED AND THE LIFE / COUNT OF THE PROJECTILE ZEROED TO REMOVE IT. A HIT SHIP / IS SUITABLY FLAGGED / *2000 CHECK, 0 /HERE TO TEST FOR A PROJECTILE HIT TAD ONEFLG /CANT HIT SOMETHING IN HYPERSPACE SZA CLA JMP CHECK2 TAD ONEOUT /OR SOMETHING THAT'S BEEN HIT SZA CLA JMP CHECK2 TAD PROX /CHECK X COORDINATES OF SHIP ONE CIA /AND PROJECTILE TAD ONEPEX /THIS SORT OF THING IS WHY THE SPA /COORDINATES HAVE TO BE MAINTAINED TO 12 CIA /BITS TAD LIMIT /CLOSE ENOUGH? SMA CLA JMP CHECK2 /IF X ISN' CLOSE ENOUGH THEN NO HIT TAD PROY /X WAS CLOSE ENOUGH, HOW ABOUT Y? CIA TAD ONEPEY SPA CIA TAD LIMIT SMA CLA JMP CHECK2 /NO HIT TAD MEXP /DEPOSIT EXPLOSION COUNT IN ONEOUT DCA ONEOUT /ALL THAT IS NECESSARY JMS CUTOUT /REMOVE PROJECTILE CHECK2, TAD TWOFLG /NO HIT ON NUMBER ONE, TRY NUMBER TWO SZA CLA JMP I CHECK /BUT NOT IF IN HYPERSPACE TAD TWOOUT /OR IF ALREADY HIT SZA CLA JMP I CHECK TAD PROX /CHECK X'S FIRST CIA TAD TWOPEX SPA /GET ABSOLUTE VALUE OF DIFFERENCE CIA TAD LIMIT /AND TEST MAGNITUDE AGAINST PROXIMITY SMA CLA /LIMIT JMP I CHECK /NOWHERE NEAR CLOSE TAD PROY /NYAH, NYAH CIA /TRY THE Y'S TAD TWOPEY SPA CIA /ABSOLUTE VALUE OF DIFFERENCE TAD LIMIT SMA CLA JMP I CHECK /CLEAN MISS! TAD MEXP /HIT ON TWO - END EVERYTHING BY SETTING DCA TWOOUT /TWOOUT TO NON-ZERO EXPLOSION COUNT JMS CUTOUT JMP I CHECK /EXIT AFTER DESTOYING PROJECTILE LIMIT, -120 /PROXIMITY LIMIT FOR WHAT CONSTITUTES A HIT CUTOUT, 0 /THIS ROUTINE ZEROES OUT THE MOST RECENTLY TAD M4 /DISPLAYED PROJECTILE BY ZEROEING THE TAD BUFTMP /COUNT DCA CUTPNT DCA I CUTPNT JMP I CUTOUT CUTPNT, 0 / / THIS ROUTINE IS CALLED TO TEST FOR A COLLISION BETWEEN THE / TWO SHIPS. THE COORDINATES OF BOTH ARE COMPARED / AND IFF SUFFICIENTLY CLOSE BOTH ARE DESTROYED BY SETTING / THEIR EXPLOSION COUNTS NON-ZERO. / COLLID, 0 /HERE TO TEST FOR COLLISION TAD ONEFLG /NO TEST IF EITHER SHIP IS IN SZA CLA /HYPERSPACE OR EXPLODING JMP I COLLID TAD TWOFLG SZA CLA JMP I COLLID TAD ONEOUT SZA CLA JMP I COLLID TAD TWOOUT SZA CLA JMP I COLLID TAD ONEPEX /BOTH SHIPS AVAILABLE FOR COLLISION CIA /CHECK X COORDINATES FIRST TAD TWOPEX SPA /GET ABSOLUTE VALUE OF DIFFERENCE CIA TAD COLLIM /CLOSE ENOUGH? SMA CLA JMP I COLLID /NOPE, FORGET IT TAD ONEPEY /YES, NOW TRY THE Y COORDINATES CIA TAD TWOPEY SPA CIA /GET MAGNITUDE ONLY TAD COLLIM SMA CLA /CLOSE ENOUGH? JMP I COLLID TAD MEXP /YES, SET BOTH EXPLOSION COUNTS DCA ONEOUT TAD MEXP DCA TWOOUT JMP I COLLID COLLIM, -300 / / THIS ROUTINE IS CALLED TO SET ONE OF THE TWO SHIPS INTO / HYPERSPACE. ON ENTRY THE AC=-1 FOR SHIP #1, 0 FOR SHIP / NUMBER 2. THE LOCATION CLOCK IS USED FOR A RANDOM / ADDRESS POINTER FROM WHICH WILL BE DRAWN THE / VARIOUS PARAMETERS FOR REENTRY. / *2200 HYPSET, DCA RTNFLG /HERE WITH AC=-1 OR 0 TAD RTNFLG /SET UP LIST POINTER SZA CLA TAD ONEDIF /TO APPROPRIATE SHIP FILE TAD TWOLST DCA AUTO15 TAD CLOCK /SET UP "RANDOM NUMBER GENERATOR" DCA AUTO17 TAD I AUTO17 /PICK UP FIRST THE AMOUNT OF TIME AND TIMOUT /OUT OF NOMAL SPACE LIMITED TO -777 CIA /UPDATE CYCLES ( ABOUT 15 SECONDS) DCA I AUTO15 /AND STORE IN ONEOUT OR TWO OUT TAD I AUTO17 /THE NEXT RANDOM NUMBER BECOMES THE JMS I THEADJ /ANGLE OR ORIENTATION ON REENTRY DCA I AUTO15 TAD I AUTO17 /AND THE NEXT BECOMES THE X VELOCITY JMS VEESET /COMPONENT DCA I AUTO15 TAD I AUTO17 /AND THEN THE Y COMPONENT JMS VEESET DCA I AUTO15 TAD I AUTO17 DCA I AUTO15 TAD I AUTO17 DCA I AUTO15 TAD I AUTO17 /FINALLY SEE IF RETURN WILL BE SUCCESSFLY AND TIMOUT TAD MHYP /ABOUT 3/4 CHANCE SMA CLA JMP HYPRET /OK TAD RTNFLG /THIS IS THE ONE TIME IN FOUR. SET SZA CLA /UP FOR EXPLOSION ON REENTRY TAD ONEDIF TAD OUTLOC DCA VEESET TAD MEXP DCA I VEESET HYPRET, ISZ RTNFLG JMP I TWORTN JMP I ONERTN TIMOUT, 777 ONEDIF, ONEFLG-TWOFLG TWOLST, TWOFLG-1 RTNFLG, 0 ONERTN, TWOUP TWORTN, ONESET OUTLOC, TWOOUT MHYP, -200 VEESET, 0 /HERE TO LIMIT VELOCITY COMPONENTS CLL SPA /GET MAGNITUDE CML AND HM177 /LIMIT TO 177 SZL CLL CIA JMP I VEESET /AND EXIT HM177, 177 ONEEXP, CLA CLL /HERE TO DISPLAY SHIP NUMBER ONE AS TAD ONETHE /AN EXPLOSION TAD INCONE /FIRST ROTATE IT BY A GOOD DOLLOP DCA ONETHE JMS I IXPDIS /THEN CALL THE EXPLOSION GENERATOR ISZ ONEOUT /DONE WITH THE EXPLOSION? JMP I NOWTWO /NO, NORMAL RETURN IAC /YES, SET INTO PSEUDO HYPER SPACE DCA ONEFLG IAC /DISABLE RETURN FROM HYPER SPACE DCA ONEFIN TAD TWOFIN /IS NUMBER TWO STILL AROUND? SNA CLA JMP I NOWTWO /YES, RETURN JMP I TIEUP /NO, TIE BALL GAME TWOEXP, CLA CLL /HERE TO DISPLAY SHIP NUMBER TWO TAD TWOTHE /AS AN EXPLOSION. BASH IT AROUND TAD INCTWO DCA TWOTHE JMS I IXPDIS /THEN DISPLAY IT ISZ TWOOUT /DONE WITH EXPLOSION? JMP I NOWPRO /NO, NORMAL RETURN IAC /YES, SEND INTO PSEUDO HYPER SPACE DCA TWOFLG IAC /DISABLE NORMAL RETURN FROM HYPERSPACE DCA TWOFIN /CHECK NUMBER ONE TAD ONEFIN SZA CLA /STILL ALIVE AND WELL? JMP I TIEUP /NO, TIE GAME JMP I NOWPRO /YES, CONTINUE ON NOWTWO, TWODIS NOWPRO, PRODIS TIEUP, NOWIN IXPDIS, EXPDIS INCONE, 55 INCTWO, 55 / / HERE TO DISPLAY THE FIGURE POINTED TO BY AUTO10 AS / AN EXPLOSION. THIS WORKS THE SAME WAY AS THE NORMAL / DISPLAY ROUTINE EXCEPT THAT THE COORDINATE INCREMENTS / ARE INVERTED TURNING THE FIGURE INSIDE OUT FOR S / A SORT OF CLOBBY EXPLOSION. / *2400 EXPDIS, 0 /HERE TO DISPLAY A FIGURE INSIDE OUT TAD I AUTO10 /WITH THE POINTERS AND COUNTS ALREADY DCA XTWODS /SET UP BY FILDIS OR TWODIS TAD I AUTO10 /STICK NEXT TWO POINTS INTO LINE DCA YTWODS TAD XTWODS CIA /CALCULATE INCREMENT THE WRONG WAY TAD XONEDS DCA DIXTEM /AND STORE TAD YTWODS CIA TAD YONEDS DCA DIYTEM /SAME FOR Y TAD M4 /4 DOTS IN THE VECTOR" DCA DISCNT /COULD HAVE CALLED THE OTHER /VECTOR GENERATOR I SUPPOSE EXPLOP, TAD XONEDS TAD DIXTEM /ADD X AND Y INCREMENTS TO THE RUNNING DCA XONEDS /TOTALS AND DISPLAY THE RUNNING TAD YONEDS /TOTALS NORMAL SIZE TAD DIYTEM DCA YONEDS TAD XONEDS RTR /COULD MAKE TWICE AS BIG BY NOP-ING RAR /THE RAR'S BUT THE SCREEN IS SMALL ENOUGH DXC DXL /AS IT IS CLA TAD YONEDS RTR RAR DYC DYL DIS CLA ISZ DISCNT /DONE 4 DOTS? JMP EXPLOP /NO ISZ AUTO11 /DONE ALL VECTORS IN THE FILE? SKP JMP I EXPDIS /YES, EXIT TAD XTWODS /NO SWAP TO NEXT PAIR OF POINTS DCA XONEDS TAD YTWODS DCA YONEDS JMP EXPDIS+1 / / VEELIM IS THE SCALING ROUTINE FOR VELOCITY COMPONENTS. / THE COMPONENTS ARE SCALED TO REMAIN IN THE RANGE 140 / TO -140. THIS IS NECESSARY TO AVOID ASTRONOMICAL SPPED / BUILDUP ON THE SMALL SCREEN. UNFORTUNATELY THE X AND Y / COMPONENTS ARE SCALED SEPARATELY WHICH GIVES SLIGHT BUT / NOTICABLE DISTORTIONS IN DIAGONAL FLIGHT PATHS. IN THE / NORMAL HEAT OF THE BATTLE NO ONE WILL REALLY NOTICE. / VEELIM, 0 /ENTER TO SCALE VELOCITY HELD IN DCA VEEHLD /AC TAD VEEHLD SMA /BRANCH FOR POSITIVE OR NEGATIV JMP VEEPOS TAD VEEMAX SMA CLA /GREATER THAN MAXIMUM POSITIVE? JMP VEECLR /NO TAD VEEMIN /I MEAN MAXIMUM NEGATIVE - YES SET JMP I VEELIM /TO MAX NEGATIV VEEPOS, TAD VEEMIN /GREATER THAN MAX? SPA CLA JMP VEECLR /NO TAD VEEMAX /YES SET TO MAX JMP I VEELIM VEECLR, TAD VEEHLD /IT WAS IN RANGE ALL ALONG JMP I VEELIM VEEHLD, 0 VEEMIN, -140 VEEMAX, 140 THEAJI, 0 /HERE TO ADJUST THE ANGLE TO A RANGE SMA /0-550 OR 0-360 DEGREES. THIS IS JMP .+3 /NECESSARY TO INSURE THAT PUSHDOWN OVERFLOW TAD P550 /WILL NOT HAPPEN IN THE SINE AND COSINE JMP .-3 /ROUTINES. THIS SIMPLY TAKES THE AC TAD M550 /MODULO 360 AND EXITS SMA JMP .-2 TAD P550 /FOLLOW IT THROUGH AND SEE IF IT DOESN'T JMP I THEAJI / / ONE OF THESE ROUTINE IS ENTERED WHEN A WINNER IS DECLARED. / THE ADDRESS OF THE VICTORY MESSAGE IS PLACED IN MESS AND / THE GAMOVR FLAG SET TO CAUSE A BRANCH TO JOBLOP WHEN THE / DISPLAY CYCLE IS COMPLETED. THE ROUTINE WILL THEN DISPLAY / THE APPROPRIATE MESSAGE OVER THE REMAINING SHIPS IF / ANY UNTIL THE KEYBOARD IS MOLESTED OR THE CLOCK RUNS OUT / AND THE NEXT DISPLAY UPDATE CYCLE IS SET. AT ANY RATE THE / PROGRAM WILL REACH HERE ONLY WHEN SOMEONE HAS BITTEN THE / INTERGALACTIC DUST. / ONEWIN, 0 /THIS IS CALLED WHEN TWOFIN IS SET TAD MES1 /AND ONE FIN IS NOT. SET ONE TO VICTOR DCA MESS /AND SET GAMOVR FLAG IAC DCA GAMOVR JMP I ONEWIN /THEN RETURN TO UPDATE CYCLE TWOWIN, 0 /THIS IS CALLED WHEN ONEFIN IS SET TAD MES2 /AND TWO FIN IS NOT DCA MESS /SET ALSO GAMOVR IAC DCA GAMOVR JMP I TWOWIN NOWIN, TAD MES4 /GET HERE WHEN BOTH ONEFIN AND TWOFIN DCA MESS /ARE SET . IAC DCA GAMOVR /NOBODY EVER REALLY WINDS /UP THE WINNER IN THESE THINGS JOBLOP, DSB 1 /THIS IS ENTERED FROM FINISH WHEN TAD MES0 /GAMOVR IS SET AND SERVES TO DISPLAY JMS I MESOUT /THE VICTORY MESSAGE ON THE SCREEN TAD MESS /USING THE CHARACTER GENERATOR SOMEWHAT JMS I MESOUT /FURTHER ON UNTIL THE GAME IS RESTARTED TAD MES5 /OR UNTIL THE INTERRUPT COUNT OVERFLOWS JMS I MESOUT /AND THE UPDATE CYCLE IS RESTARTED TAD MES3 JMS I MESOUT FINITO, JMP JOBLOP MES0, MESS0 MES1, MESS1 MES2, MESS2 MES3, MESS3 MES4, MESS4 MES5, MESS5 MESS, 0 / / THE FOLLOWING ARE THE SINE AND COSINE ROUTINES CUSTOMIZED / FOR THIS PROGRAM FROM ANOTHER I WORKED ON. CALL EITHER / SINE OR COSINE WITH ANGLE IN DEGREES IN AC. THE ARGUEMENT / IS REDUCED THROUGH RECURSION UNTIL BETWEEN 0-89 DEGREES / AND THEN A TABLE LOOKUP DONE TO OBTAIN THE VALUE. IT TAKES / UP A FAIR AMOUNT OF SPACE BUT IT WORKS JUST FASTER / THAN SHEEP. THE COSINE CALL JUST TRANSFORMS THE ARGUEMENT / THROUGH SOME TRIGONOMETRIC GARBAGE AND CALLS THE SINE / ROUTINE. NOTE THAT CALLING EITHER ROUTINE WITH TOO / LARGE AN ARGUEMENT WILL CAUSE PUSHDOWN OVERFLOW AND THEN / ALL HELL WILL BREAK LOOSE. THE ORIGINAL ROUTINE FROM WHICH / THIS WAS STOLEN HAD FULL WORD PRECISION. / *6400 SINEIN, 0 /I REALLY CANT BRING MYSELF TO COMMENT DCA SINARG /THIS. IT'S VERY STRAIGHFORWARD TAD SINEIN DCA I SINPSH ISZ SINPSH TAD SINARG SZA JMP SINNG2 SINPOP, CLA CLL CMA TAD SINPSH DCA SINPSH TAD I SINPSH DCA SINEIN TAD SINARG JMP I SINEIN SINNG2, SMA JMP SINPOS CIA JMS SINEIN SINNEG, CIA DCA SINARG JMP SINPOP SINPOS, TAD M264 SPA JMP .+2 JMP SINNEG-1 TAD P132 SPA JMP SINELK SZA CLA JMP .+3 TAD P37 JMP SINNEG+1 TAD SINARG TAD M264 JMP SINNEG-1 SINELK, TAD P132 TAD SINTAB DCA SINEIN TAD I SINEIN DCA SINARG JMP SINPOP SINARG, 0 SINPSH, SINLST SINLST, 0 0 0 0 0 0 SINTAB, SINES-1 COSINI, 0 CIA TAD P132 JMS SINEIN JMP I COSINI SINES, 00 /1 01 /2 01 /3 02 /4 02 /5 03 /6 03 /7 04 /8 05 /9 05 /10 06 /11 06 /12 07 /13 07 /14 10 /15 10 /16 11 /17 11 /18 12 /19 12 /20 13 /21 13 /22 14 /23 15 /24 15 /25 16 /26 16 /27 17 /28 17 /29 20 /30 20 /31 20 /32 21 /33 21 /34 22 /35 22 /36 23 /37 23 /38 24 /39 24 /40 25 /41 25 /42 25 /43 26 /44 26 /45 27 /46 27 /47 27 /48 30 /49 30 /50 30 /51 31 /52 31 /53 31 /54 32 /55 32 /56 32 /57 33 /58 33 /59 33 /60 33 /61 34 /62 34 /63 34 /64 35 /65 35 /66 35 /67 35 /68 35 /69 36 /70 36 /71 36 /72 36 /73 36 /74 36 /75 37 /76 37 /77 37 /78 37 /79 37 /80 37 /81 37 /82 37 /83 37 /84 37 /85 37 /86 37 /87 37 /88 37 /89 MULTI, 0 /THIS IS STANDARD SINGLE PRECISION CLL /MULTIPLY ROUTINE WHICH WAS ONCE SPA /USED. I'VE LEFT IT IN SINCE CMA CML IAC /THERE IS LOTS OF CORE LEFT OVER AND DCA MULMP1 /MAYBLE SOMEDAY I'LL NEED IT TO PUT DCA MULMP5 /IN A SUN OR SOMETHING. THIS IS THE TAD I MULTI /STANDARD DEC SUBROUTINE WITH DIFFERENT SNA /LABELS JMP MULPSN+2 SPA CMA CML IAC DCA MULMP2 TAD MULTHR DCA MULMP3 MULMP4, TAD MULMP1 RAR DCA MULMP1 TAD MULMP5 SZL TAD MULMP2 CLL RAR DCA MULMP5 ISZ MULMP3 JMP MULMP4 TAD MULMP1 RAR MULPSN, SZL JMP MULCMP DCA MULMP1 TAD MULMP5 MULMPZ, ISZ MULTI JMP I MULTI MULCMP, CMA CLL IAC DCA MULMP1 TAD MULMP5 CMA SZL IAC JMP MULMPZ MULTHR, 7764 MULMP1, 0 MULMP5, 0 MULMP2, 0 MULMP3, 0 / / SHIFTR DIVIDES THE AC BY TWO WHETHER POSITIVE OR NEGATIVE / AND IS CALLED FROM VARIOUS PLACES. NOT ENTIRELY MYSTERIOUS / SHIFTR, 0 CLL SPA CML IAC RAR JMP I SHIFTR / / POSCAL IS CALLED TO CALCULATE THE COORDINATE INCREMENTS / NECESSARY TO PRODUCE THE SHIP FIGURES. RATHER THAN DOING / A LOT OF EXPENSIVE MATH THIS DOES A QUICK PRODUCTION / OF 1, 2, AND 3 TIMES THE SIN AND COSINE VALUES FOUND / IN CALSIN AND CALCOS LEAVING THEM IN THE TABLE FOR / ONESET AND TWOSET. IF THE SCOPE WERE ANY BETTER / THIS PROBABLY WOULDN'T BE NEAR GOOD ENOUGH BUT.... / POSCAL, 0 TAD CALSIN DCA T10SIN TAD T10SIN CLL RAL DCA T20SIN TAD T10SIN TAD T20SIN DCA T30SIN TAD CALCOS DCA T10COS TAD T10COS CLL RAL DCA T20COS TAD T10COS TAD T20COS DCA T30COS JMP I POSCAL *7000 /GENERAL PURPOSE SYMBOL GENERATOR / CHARS, 0 /ENTRY TO PLOT CHARACTER STRING DCA ADDR /STORE STRING ADDRESS TAD I ADDR /FETCH DOUBLE CHARACTER RTR /SHIFT RTR / FOR FIRST RTR / CHARACTER JMS CHAR /PLOT CHARACTER SKP /NORMAL RETURN -- SKIP JMP I CHARS /TERMINATION RETURN -- EXIT TAD I ADDR /RECALL DOUBLE CHARACTER ISZ ADDR /ADVANCE STRING ADDRESS JMS CHAR /PLOT CHARACTER JMP CHARS+2 /NORMAL RETURN -- REPEAT JMP I CHARS /TERMINATION RETURN -- EXIT / CHAR, 0 /ENTRY TO PLOT SINGLE CHARACTER AND K77 /MASK OUT UPPER BITS CLL RAL /MULTIPLY CODE BY TWO TAD TABLE /ADD TABLE BASE ADDRESS DCA POINT /CONSTRUCT POINTER TO 24-BIT CODE CMA /INITIALIZE COUNTER FOR DCA COUNT2 / TWO PLOT WORDS TAD I POINT /FETCH FIRST PLOT WORD ISZ POINT /INCREMENT POINTER FOR NEXT ONE SNA /SKIP IF NOT SPECIAL CHARACTER JMP SPCHAR /ELSE GO PROCESS IT DCA CURPLT /SAVE CURRENT PLOT BITS XPLOT, TAD KM6 /INITIALIZE 6-BIT DCA COUNT6 / COUNTER TAD YVALUE /RESET Y TEMPORARY DCA YTEMP / VALUE FOR CHARACTER TAD XVALUE /OUTPUT CURRENT DXC DXL / X-VALUE TO CRT TAD XINCR /INCREMENT DCA XVALUE / ABSCISSA YPLOT, TAD CURPLT /RECALL CURRENT PLOT BITS CLL RAL /GET NEXT BIT DCA CURPLT /SAVE REMAINING PLOT BITS SNL /SKIP IF POINT TO PLOT JMP CNTINU /ELSE JUMP AHEAD TAD YTEMP /OUTPUT CURRENT DYC DYL DIS / Y-VALUE TO CRT CLA CLL /CLEAR AC TAD CURPLT /RECALL CURRENT PLOT BITS SNA CLA /SKIP IF POINTS REMAINING JMP WRDEND /ELSE WORD IS FINISHED CNTINU, TAD YTEMP /INCREMENT TEMPORARY TAD YINCR / Y-VALUE FOR NEXT DCA YTEMP / CHARACTER STEP ISZ COUNT6 /SKIP IF 6 BITS PLOTTED JMP YPLOT /ELSE PLOT NEXT ONE JMP XPLOT /GO UPDATE X-VALUE WRDEND, ISZ COUNT2 /SKIP IF ANOTHER BIT WORD JMP EXIT /ELSE EXIT TAD I POINT /FETCH SECOND BIT WORD SZA /SKIP IF NO PLOT POINTS JMP XPLOT-1 /ELSE GO PLOT THEM EXIT, TAD XVALUE /INCREMENT ABSCISSA TAD XINCR / FOR SPACE BETWEEN DCA XVALUE / SYMBOLS JMP I CHAR /EXIT FROM CHAR / SPCHAR, TAD I POINT /FETCH TRANSFER VECTOR DCA POINT /STORE AS INDIRECT ADDRESS JMP I POINT /GO TO APPROPRIATE ROUTINE SPACE, TAD XINCR /FETCH BASIC ABSCISSA INCREMENT CLL RTL /MULTIPLY BY FOUR AND JMP EXIT / GO CREATE SPACE CRLF, TAD INITX /"CARRIAGE RETURN" RESETS X DCA XVALUE / TO ITS ORIGINAL VALUE LF, TAD YINCR /"LINE FEED" CLL RTL / DECREMENTS THE CLL CIA RAL / Y-VALUE BY TAD YVALUE / EIGHT SCALE DCA YVALUE / STEPS JMP I CHAR /EXIT FROM CHAR RESET, TAD INITX /"RESET" RESETS DCA XVALUE / X AND Y TO TAD INITY / THEIR ORIGINAL JMP RESET-2 / VALUES TERM, ISZ CHAR /TERMINATE CODE CAUSES JMP I CHAR / EXIT TO P+2 / INITX, 0 /INITIAL X-VALUE INITY, 327 /INITIAL Y-VALUE XVALUE, 0 /CURRENT X-VALUE YVALUE, 0 /CURRENT Y-VALUE XINCR, 6 /BASIC X INCREMENT VALUE YINCR, 10 /BASIC Y INCREMENT VALUE YTEMP, 0 /TEMPORARY Y-VALUE CURPLT, 0 /CURRENT PLOT BITS ADDR, 0 /CURRENT STRING ADDRESS COUNT6, 0 /6-BIT COUNTER COUNT2, 0 /2-WORD COUNTER KM6, -6 /CONSTANT FOR COUNT6 K77, 77 /CHARACTER CODE MASK POINT, 0 /TABLE POINTER / / TABLE, .+1 /TABLE BASE ADDRESS 0 /SPECIAL CHARACTER (00) TERM /TERMINATION CODE 7611 / A 1176 7745 / B 4532 3641 / C 4122 7741 / D 4136 7745 / E 4541 7705 / F 501 7741 / G 5173 7710 / H 1077 4177 / I 4100 2040 / J 4037 7714 / K 2241 7740 / L 4040 7702 / M 277 7706 / N 3077 7741 / O 4177 7705 / P 502 3641 / Q 6176 7715 / R 2542 2245 / S 5122 177 / T 100 3740 / U 4037 1720 / V 4037 7730 / W 3077 4136 / X 3641 374 / Y 7403 6151 / Z 4543 7741 / [ 0 204 / \ 1020 4177 / ] 0 436 / ^ 400 0 /SPECIAL CHARACTER (37) RESET /RESET 0 /SPECIAL CHARACTER (40) SPACE /SPACE 5600 / ! 0 303 / " 0 1477 / # 7714 2277 / MARKER 2200 2313 / % 6462 7777 / BLOCK 7777 300 / ' 0 3641 / ( 0 4136 / ) 0 4040 / UNDERSCORE (52) 4040 1034 / + 1000 0 /SPECIAL CHARACTER (54) LF /LINE FEED 1010 / - 1000 4000 / . 0 2010 / / 402 3641 / 0 4136 4442 / 1 7740 4261 / 2 5146 2145 / 3 5321 1710 / 4 1077 4745 / 5 4531 7750 / 6 5070 6111 / 7 503 2255 / 8 5522 705 / 9 577 2400 / : 0 0 /SPECIAL CHARACTER (73) CRLF /CARRIAGE RETURN; LINE FEED 1024 / > 4200 1212 / = 1200 4224 / < 1000 255 / ? 300 / / HERE FOLLOW THE PACKED ASCII TEXTS FOR THE VARIOUS / VICTORY MESSAGES. PERSONS ADVENTEROUS TO FIND THIS MIGH CARE / TO TOGGLE IN SOME CUTE LITTLE MESSAGES OF THEIR OWN. / MESS0, 3773 MESS5, 7340 4040 4040 4000 MESS1, 1716 0500 MESS2, 2427 1700 MESS3, 2711 1623 4100 MESS4, 1617 0217 0431 0000 *7400 DISBUF, 0 / THE DISPLAY BUFFERS BEGIN HERE AND EXTEND UP SOMEWHERE TO / AROUND 7575 OR SO. / / / / / $ //////////////////////////// / / THIS IS THE END / ///////////////////////////