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ksp: more comment re-writing
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Vince Weaver
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commit
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109
ksp/ksp.bas
109
ksp/ksp.bas
@ -15,16 +15,49 @@
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' as well as slow down execution as BASIC is interpreted.
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'
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' Variable List: (Note, in Applesoft only first 2 chars matters)
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' A$ = keypressed
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' AN$ = astrounat name
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' C$ = contract name
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' D$ = ASCII(4) indicating we have a DOS command
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' AD() = astronaut dead
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' AN = rocket angle
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' AX/AY= rocket x/y acceleration
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' BF =
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' CQ = current quadrant (i.e. background to display)
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' DT =
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' DV() = deltaV
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' EM() = per-stage empty mass
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' FM() = per-stage fuel mass
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' EN() = engines per stage
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' FF() = fuel flow
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' FT() = fuel tanks per stack
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' G = gravity
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' GX/GY= gravity X/Y vector
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' H = horizon
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' I = loop iterator
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' J = loop iterator
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' KE = astronaut eyes
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' KR = planet radius
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' LN = launched
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' MX = maximum altitude reached
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' OM = orbit mode (view)
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' P = number of parachutes
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' RA = distance to center of planet
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' RR = altitude
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' RX/RY= rocket x,y position
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' S = Current Stage Number
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' SR = Number of struts
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' SS = Number of stages
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' TH() = stage thrust
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' TR =
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' T = time
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' SM() = per-stage stage mass
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' ST() = Stacks per stage
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' TM() = per-stage total mass
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' TW() = thrust/weight ratio
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' V = velocity magnitude
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' VX/VY= velocity x/y vector
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' W = Which astronaut
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'
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' Clear screen
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10 HOME:HGR:D$=CHR$(4)
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@ -110,23 +143,21 @@
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1330 PRINT "HOW MANY PARACHUTES? (0-3)";:INPUT P
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1350 PRINT "HOW MANY STRUTS? (0-20000)";:INPUT SR
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1370 SS=S
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1500 REM *** ASTRONAUT COMPLEX ***
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1505 TEXT: HOME
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1510 HTAB 11
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' *********************************
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' *** ASTRONAUT COMPLEX ***
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' *********************************
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1500 TEXT: HOME: HTAB 11
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1515 INVERSE: PRINT "ASTRONAUT COMPLEX": NORMAL
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1520 PRINT
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1522 PRINT "CHOOSE ONE KERBAL FOR THIS MISSION:"
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1525 PRINT
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1520 PRINT:PRINT "CHOOSE ONE KERBAL FOR THIS MISSION:":PRINT
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1530 FOR I=1 TO 8
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1540 IF AD(I) GOTO 1600
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1550 ON I GOSUB 1641,1642,1643,1644,1645,1646,1647,1648
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1560 PRINT " ";I;". ";AN$,AJ$;" S: ";AS$;" C: ";AC$
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1600 NEXT I
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1605 PRINT
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1610 INPUT W
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1605 PRINT: INPUT W
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1615 IF W<1 OR W>8 THEN PRINT "INVALID INPUT, PLEASE TRY AGAIN!": GOTO 1610
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1630 ON W GOSUB 1641,1642,1643,1644,1645,1646,1647,1648
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1630 GOTO 1700
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1630 GOTO 1776
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1641 AN$="JEBEDIAH" :AJ$="PILOT":AS$="****":AC$="****":RETURN
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1642 AN$="VALENTINA":AJ$="PILOT":AS$="****":AC$="****":RETURN
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1643 AN$="KAI" :AJ$="SCI ":AS$="*** ":AC$="***":RETURN
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@ -135,28 +166,43 @@
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1646 AN$="SLASHDOT" :AJ$="SCI ":AS$="*** ":AC$="*":RETURN
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1647 AN$="ZURGTROYD":AJ$="PILOT":AS$="** ":AC$="***":RETURN
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1648 AN$="DAPHTY" :AJ$="ENGR ":AS$="*** ":AC$="***":RETURN
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1700 REM TEXT:HOME
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1720 REM AN$="ZURGTROYD":SS=3
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1750 REM EN(1)=1:ST(1)=1:FT(1)=1
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1751 REM EN(2)=2:ST(2)=2:FT(2)=1
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1752 REM EN(3)=3:ST(3)=3:FT(3)=1
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'*** REM DEBUG, Uncomment and Jump here to skip loading
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'1700 REM TEXT:HOME
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'1720 REM AN$="ZURGTROYD":SS=3
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'1750 REM EN(1)=1:ST(1)=1:FT(1)=1
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'1751 REM EN(2)=2:ST(2)=2:FT(2)=1
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'1752 REM EN(3)=3:ST(3)=3:FT(3)=1
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'************************
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'* Rocket Summary ***
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'************************
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'*** REM Load Rocket Shape Table
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1776 POKE 232,0:POKE 233,16
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1783 PRINT CHR$(4);"BLOAD ROCKET.SHAPE,A$1000"
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1783 PRINT D$"BLOAD ROCKET.SHAPE,A$1000"
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1800 HOME:PRINT "ROCKET SUMMARY:":PRINT
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1802 G=-9.8:LN=0:CQ=0:OM=0:S=SS:DT=1
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1805 FOR I=1 TO S
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'*** REM EmptyMass=Engines*1.5T+(Stacks*FuelTanks)*0.5T
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1810 EM(I)=EN(I)*1.5+ST(I)*FT(I)*0.5
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'*** REM First stage also has a 1T capsule
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1812 IF I=1 THEN EM(I)=EM(I)+1.0
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'*** REM FuelMass=(Stacks*FuelTanks)*4T
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1814 FM(I)=ST(I)*FT(I)*4.0
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'*** REM StageFuel=FuelMass (one gets decremented as we use it up)
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1815 SF(I)=FM(I)
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'*** REM StageMass=EmptyMass+FuelMass
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1816 SM(I)=EM(I)+FM(I)
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'*** REM Total mass of stage includes all higher stages
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1820 TM(I)=0
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1822 FOR J=1 TO I
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1825 TM(I)=TM(I)+SM(J)
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1830 NEXT J
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'*** Thrust=NumberOfEngines*168kN
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1835 TH(I)=EN(I)*168
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'*** DeltaV=ISP*gravity*ln(total_mass/empty_mass)
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1840 DV(I)=270*-G*LOG(TM(I)/(TM(I)-FM(I)))
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'*** Thrust/Weight Ratio
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1850 TW(I)=TH(I)/(TM(I)*-G)
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'*** Fuel Flow
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1855 FF(I)=TH(I)/(270*-G)
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1990 PRINT "STAGE: ";4-I
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1991 PRINT " TANKS=";ST(I)*FT(I);" ENGINES=";EN(I)
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@ -166,20 +212,34 @@
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2000 NEXT I
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2998 GET A$
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2999 HOME
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'******************************
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'*** Main Loop ****
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'******************************
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3000 AN=0:GX=0:GY=-9.8:GA=0:V=0:VX=0:VY=0:AX=0:AY=0:KR=600000
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3016 RX=0:RY=KR+10:RA=KR+10:TR=0:T=0:BF=0:MX=0
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3020 HGR:ROT=0:SCALE=2:H=0
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3030 REM ** LAUNCHPAD **
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3035 PRINT:PRINT CHR$(4);"BLOAD LAUNCHPAD.HGR,A$2000"
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'**** REM ** LAUNCHPAD **
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3035 PRINT:PRINT D$"BLOAD LAUNCHPAD.HGR,A$2000"
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'**** REM DRAW HORIZON (GREEN)
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3038 HCOLOR=1:HPLOT 1,80 TO 132,80: HPLOT 148,80 TO 247,80
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'**** REM DRAW GANTRY (WHITE)
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3039 HCOLOR=3:HPLOT 110,110 TO 110,60:HPLOT TO 130,60: HPLOT 110,70 TO 130,70
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'**** DRAW SHIP
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3040 XDRAW 1+((S-1)*2)+TR AT 140,80
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4000 REM ** LOOP **
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4000 REM ** MAIN LOOP **
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'**** REM ** if not launched yet then skip physics
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4002 IF LN=0 GOTO 5032
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'**** Calculate altitude and set maximum if we are at new record
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4003 RR=RA-KR:IF RR>MX THEN MX=RR
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'**** If orbit mode then skip drawing horizon, etc
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4004 IF OM=1 GOTO 4018
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'**** If above 1.8km don't draw horizon
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'**** FIXME: do we need to check OM again?
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'**** FIXME: we draw the horizon one pixel too far to right
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4005 IF RR>1800 OR OM=1 THEN GOTO 4012
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'**** Erase old horizon
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4007 HCOLOR=0:HPLOT 1,80+H TO 132,80+H:HPLOT 148,80+H TO 247,80+H
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'**** Calculate and draw new horizon
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4010 H=RR/20:HCOLOR=1:HPLOT 1,80+H TO 132,80+H:HPLOT 148,80+H TO 247,80+H
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4012 IF RR<40000 AND CQ<>0 THEN GOSUB 7600
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4014 IF RR<40000 GOTO 4018
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@ -276,8 +336,10 @@
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8225 HCOLOR=1:HPLOT 259,155 TO 271,155:HPLOT 259,156 TO 271,156
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8226 HCOLOR=0:HPLOT 259,155 TO 271,155:HPLOT 261,156 TO 269,156
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8227 RETURN
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9000 REM *** CONTRACT COMPLETE ***
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9005 IF MX<40000 THEN C$="CRASH SHIP":F$="0.30":E$="-1":GOTO 9010
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'*****************************
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'*** CONTRACT COMPLETE ***
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'*****************************
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9000 IF MX<40000 THEN C$="CRASH SHIP":F$="0.30":E$="-1":GOTO 9010
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9007 C$="REACH SPACE":F$="200":E$="20"
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9010 TEXT:HOME
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9020 HTAB 10:VTAB 9
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@ -305,9 +367,10 @@
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9174 IF A$="4" OR A$="H" GOTO 9200
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9175 IF A$="5" OR A$="Q" THEN TEXT:HOME:END
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9176 GOTO 9160
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9200 REM *** HELP ***
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9210 HOME
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9220 PRINT "KSP-APPLE-II BY VINCE WEAVER"
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'*******************
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'*** HELP SCREEN ***
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'*******************
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9200 HOME:PRINT "KSP-APPLE-II BY VINCE WEAVER"
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9230 PRINT " APPLE II FOREVER"
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9240 PRINT " A,D - STEER SHIP LEFT/RIGHT"
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9250 PRINT " Z - START ENGINES"
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