Deep in caverns under Arcadia, fuel cannisters of semi-matter ore to power the city's defensive shield have been cached away against the day when the aliens would return. Composed of mixed-charge matter, hyke (as it is called) is easily persuaded to annihilate itself in the manner of matter-antimatter reactions, but is more easily stored.
Now that the attack has begun, brave volunteer retrievers must don helipacks, fly down into the caves and bring up the ore, so that Arcadia may not fall.
R.O.T.O. is a game of coodination, reflexes, timing and a hint of strategy that should keep you going for a while before Arcadia can claim victory.
Plug in your Action! cartridge and type in Listing 1. Action! is forgiving about case, spacing and line divisions, so you need not slavishly follow the format of the listing (which is compressed somewhat for purposes of publication).
SAVE it before attempting to RUN it! If you try to run R.O.T.O. from memory, the source code will be overwritten and ruined, causing much gnashing of teeth. Because R.O.T.O. is so large, it must be compiled off of disk or cassette.
Go have lunch while the source code's being saved (about fifteen minutes). Come back, clear memory with the SHIFT CLEAR, and enter the monitor with the CTRL-M command.
Rewind the tape containing the R.O.T.O. source code, press PLAY, type in R "C:" and RETURN. Have some more lunch. The computer is rereading the source code, compiling il as it does. When it's finished compiling, the game will automatically start.
In the future, you may play R.O.T.O. by inserting the tape containing the source code into the recorder and typing the R "C:" command.
<pic>
Cannisters of hyke are scattered about the caves. They look like the fuel intake, except that they're glowing. Pick up these cannisters by touching them, then return to the intake and touch it. This advances your score and charges the shield in accordance with however many cannisters you've deposited.
Each cannister is worth fifty points. Returning ore also refuels your helipack. Picking up more than ten cannisters before depositing them will cause their magnetic fields to interact with explosive results.
Your man moves up, down, left, right and diagonally in all directions, although he moves downwards faster than up. Moving against the screen's border will scroll more caverns into view, although you'll automatically stop at the far ends of the caves.
Don't run into a wall, or you'll lose a helipack. Watch your fuel. too. Running out will produce the expected effect.
Your retriever is also equipped with a molecular debonding device to facilitate going through rock. Press the fire button to let off a shot. The debonder will vaporize any chunk of rock you fire on. but you will lose a point for even' piece of the caves you eliminate (because you're reducing their structural integrity).
Unfortunately, the debonder will also affect a fuel cannister. Rupturing the magnetic bottle containing the hyke will produce a large explosion and prevent anyone else from retrieving fuel.
Also, attacks from the alien fleet will shake the caves periodically, causing rocks to break loose from the ceiling. Shooting rocks is worth one point each (for cleaning up). Don't run into them, and be careful that the tremors don't send you into a wall.
Pressing any key while a game is in progress will pause it. Press another key to resume play. If you want to begin again, press START.
If you play well and retrieve enough cannisters to top 1000 points, the shield will have stayed up long enough for reinforcements to arrive—and the city will be saved.
On the other hand, if you wreck while hauling cannisters, you could deplete the ore supply so that victory is impossible.
Remember which portions of the caverns you've mined out, and definitely recall the way back to the fuel intake. The cave network is generated randomly each game, so expect variety.
R.O.T.O. may end in five ways:
I shudder to think what I would have gone through using a conventional assembler. Even when the source code became too large to co-reside with the object code, I could compile off of my Axlon RAMDisk with little loss of development time.
The author would appreciate any letters of business offers, extravagant praise, or, failing that, constructive commept. Have fun and save Arcadia!
; R.O.T.O. by Mike Stortz
SET $000E=$4000
SET $0491=$4000
DEFINE bytes="64",lines="80",
rock="194",pmb_page="128",
cb_page="128",cb_adr=""32768",
dl_page="136",dl_adr="34816"
misc_page="137",misc_adr="35072",
sc_page="140",sc_adr="35840"
BYTE
rtclok=$14,atract=$4D,lmargin=$52,
rowcrs=$54,dindex=$57,sdmctl=$22F,
gprior=$26F,crsinh=$2F0,
ch=$2FC,gractl=$D01D,
hitclr=$D0lE,consol=$D0lF,
audctl=$D208,skstat=$D20F,
pmbase=$D407,wsync=$D40A,
vcount=$D40B,nmien=$D40E,
chbas=$2F4,chbase=$D409,
hscrol=$D404,vscrol=$D405,
pcolr0=$2C0,pcolrl=$2C1,
pcolr2=$2C2,pcolr3=$2C3,
colpm0=$D012,colpm1=$D013,
colpm2-$D014,colpm3=$D015,
colr0=$2C4,colr1=$2C5,
colr2=$2C6,colr3=$2C7,
colr4=$2C8,
colpf0=$D016,colpf1=$D017,
colpf2=$D018,colpf3=$D019,
colpf4=$D01A
BYTE ARRAY hposp=$D000,mxpf=$D000,
hposm=$D004,pxpf=$D004
CARD colcrs=$55,savmsc=$58,
vdslst=$200,sdslst=$230,
txtmsc=$294
BYTE i,j,k,l,cx,cy,x,y,xs,xsm,ys,joy,
phase,mc,face,flag,bak,fore,
fuel,packs,enable,whine,
carried,end,cans,fallc,shake,
shakec
BYTE ARRAY logo=
[85 85 88 88 88 88 85 85
128 96 88 88 88 88 96 128
0 5 21 88 88 88 88 88
0 128 96 88 88 88 88 88
0 149 149 2 2 2 2 2
0 85 85 80 80 80 80 80
2 9 37 37 37 37 37 37
80 84 37 37 37 37 37 37
85 89 88 88 88 88 0 0
128 96 88 88 88 88 88 1
88 88 88 88 88 88 21 5
88 88 88 88 88 88 96 128
2 2 2 2 2 2 2 66
80 80 80 80 80 80 80 80
37 37 37 37 37 9 2 64
37 37 37 37 37 84 88 0],
cset=
[ 0 124 198 198 198 198 254 124
0 56 120 120 56 56 124 254
0 124 206 28 56 112 254 254
0 254 28 56 28 206 254 124
0 28 60 124 220 254 28 28
0 254 192 252 14 206 254 124
0 124 192 252 206 206 254 124
0 254 14 28 56 112 112 112
0 124 198 124 198 198 254 124
0 124 206 126 14 30 124 120
0 56 124 206 206 222 206 206
0 252 14 252 206 206 254 252
0 124 254 198 192 198 254 124
0 248 220 206 206 222 220 216
0 126 252 0 240 192 252 126
0 126 252 0 252 248 224 224
0 126 224 224 238 230 254 126
0 230 230 238 230 230 230 230
0 254 56 56 56 56 254 254
0 14 14 14 14 206 254 124
0 238 238 252 240 252 238 238
0 224 224 224 224 224 252 254
0 198 238 254 214 238 238 238
0 198 238 246 254 238 230 230
0 124 198 198 198 198 254 124
0 252 6 254 252 224 224 224
0 124 198 198 198 204 254 118
0 252 6 254 252 238 238 238
0 126 0 248 126 14 254 252
0 254 0 56 56 56 56 56
0 230 230 230 230 230 254 254
0 230 230 230 230 254 124 56
0 198 198 214 254 238 198 198
0 198 238 124 56 124 238 198
0 230 230 124 56 56 56 56
0 254 28 56 112 224 254 254
0 0 0 0 0 0 0 0
255 255 187 255 223 255 251 255
60 126 223 253 255 247 126 60
255 255 255 255 255 123 49 0
255 255 255 255 222 158 12 8
63 127 127 127 63 31 63 127
127 63 63 31 63 127 63 31
0 49 123 255 255 255 255 255
8 12 158 222 255 255 255 255
254 252 248 248 252 254 252 248
248 252 254 254 252 248 248 252
0 0 32 80 255 126 68 34
4 12 30 56 16 16 32 64
0 0 4 10 255 126 34 68
32 48 120 28 8 8 4 2],
man0=
[ 0 254 16 16 28 24 28 20
24 36 42 46 52 8 8 8
8 16 16 0 0
0 127 8 8 56 24 56 40
24 36 84 116 44 0 0 16
16 8 8 8 0],
man1=
[ 0 254 16 16 16 26 26 28
16 48 49 48 48 8 24 16
16 32 32 32 32
0 127 8 8 8 40 40 40
8 12 140 12 12 16 24 8
8 4 4 4 4],
rotor= [254 124 56 16 56 124
127 62 28 8 28 62],
can= [24 60 126 90 195 195 219 255],
dldata=
[112 112 112 68 0 misc_page
4 6 11 6 139 48],
dldata2=
[112 70 160 misc_page 136
65 0 dl_page],
manadr=[0 21],rotoradr=[0 6],
missile,mdata=[ 3 12 48 192],
mx(4),my(4),id(20),ary,screen,dlist
CARD pmb,cb,a,temp,b,high
CARD ARRAY table(bytes),fall (20)
INT xd,yd,oxd,oyd,ii,score,shield
INT ARRAY mxd(4)
PROC SetVbv=$E45C(BYTE aa,bb,cc)
PROC Vblank()
[$48] ; PHA
vscrol=ys hscrol=xs*xsm
[$68] ; PLA
[$4C $62 $E4] ; JMP XITVBV
RETURN
PROC Dli()
BYTE d
[ $48
$8A $48 $98 $48 $A5 $AC $48
$A5 $AE $48 $A5 $AF $48 ]
; PHA
; TXA PHA TYA PHA LDA $AC PHA
; LDA $AE PHA LDA $AF PHA
wsync=0
IF vcount<64 THEN
chbase=chbas+2
colpf0=fore
colpf4=bak
IF enable=1 THEN
colpf1=202
colpf2=(rtclok RSH 1)&$3A
colpf3=6
ELSE
colpf1=0
colpf2=0
colpf3=0
FI
ELSE
chbase=chbas
colpf1=202
colpf4=64
FI
[ $68 $85 $AF $68 $85 $AE
$68 $85 SAC $68 $A8 568 $AA
$68]
; PLA STA $AF PLA STA $AE
; PLA STA $AC PLA TAY PLA TAX
; PLA
[$40] ; RTI
RETURN
PROC Wait(BYTE w)
BYTE w1
W1=rtclok
DO until rtclok=w1+w OD
RETURN
PROC PmSet()
sdmctl=62 gractl=3 hitclr=0
pcolr0=152 pcolr1=118 gprior=33
pmbase=pmb_page chbas=cb_page
RETURN
PROC ZeroOut()
Zero(miSSile,1280)
FOR i=0 TO 3 DO
hposp(i)=0 hposm(i)=0
OD
SndRst()
RETURN
PROC DoPhase()
Phase==+1
IF phase=6 THEN phase=0 FI
RETURN
PROC DoScore()
IF score>1000 THEN end=5 FI
dindex=2
rowcrs=4 colcrs=14 PrintBD(6,packs)
rovcrs=6 colcrs=l4 PrintD(6," ")
rowcrs=6 colcrs=14 PrintID(6,score)
dindex=6
Plot(fuel,5) Plot(shield,7)
RETURN
PROC ChargeShield()
IF carried<>0 THEN
shield==+carried LSH 2
score==+carried*50 DoScore()
SndRst()
FOR i=1 TO 250 step 10 DO
Sound(3,250-i,10,6)
Wait(1)
OD
Sound(3,0,0,0)
carried=0 fuel=50 whine=0
color=1
Plot(0,5) DrawTo(fuel,5)
Plot(0,7) DrawTo(shield,7)
color=0
FI
hitclr=0
RETURN
PROC CheckShake()
IF Rand (0)=255 AND
Rand (5)=0 and
shake=0 THEN
shake=Rand(10)+10
shield==-Rand(20)
IF Shield<0 THEN shield=0 FI
IF Shield=0 THEN end=2 FI
Plot(159,7) DrawTo(shield,7)
FI
IF shakec<>0 THEN
shakec==-l
ELSE
shakec=60
IF shake<>0 THEN
shake==-1
j=Rand(10)
IF fall(j)=0 THEN
a=table(cy)+cx+Rand(20)
IF screen(a)=0 THEN
fall(j)=a id(j)=rock
screen(a)=rock
FI
Sound(2,255-shake,2,6)
xsm=Rand(5)
ELSE
xsm=0
Sound(2,0,0,0)
FI
FI
RETURN
PROC CheckFuel()
IF (rtclok=0 or rtclok=128) AND
fuel<>0 THEN
DoScore() fuel==-1
FI
RETURN
PROC EndGame()
Zero(Misc_adr+80,80) ZeroOut()
dindex=2 rowcrs=4 colcrs=0
IF end=1 THEN
PrintDE(6," NO PACKS LEFT")
ELSEIF end=2 THEN
PrintDE(6," SHIELD DEPLETED")
ELSEIF end=3 THEN
PrintDE(6," CANNISTER RUPTURED")
ELSEIF end=4 THEN
PrintD(6," TOO MANY CANNISTERS")
ELSEIF end=5 THEN
PrintDE(6," ARCADIA THANKS YOU")
FI
PutDE(6) PrintDE(6," game over")
FOR a=1 TO 400 DO
Sound(0,a rsh 1,8,6)
DO UNTIL vcount=128 OD
FOR i=0 TO 60 DO
colpf0=vcount+rtclok
wsync=0
OD
OD
RETURN
PROC GetDir()
joy=15!stick(0) xd=0 yd=0
IF (joy&8)<>0 THEN xd= 1 FI
IF (joy&4)<>0 THEN xd=-1 FI
IF (joy&2)<>0 THEN yd= 2 FI
IF (joy&1)<>0 THEN yd=-1 FI
IF xd<>0 or yd<>0 THEN
oxd=xd oyd=yd
FI
RETURN
PROC Scroll()
IF (joy&4)<>0 THEN xs==+1 x==+1
IF xs=8 THEN
IF cx=0 THEN xs==-1
ELSE cx==-1 xs=0
FI
FI
ELSEIF (joy&8)<>0 THEN xs==-1 X==-1
IF xs=255 THEN
IF cx=44 THEN xs==+1
ELSE cx==+1 xs=7
FI
FI
FI
IF (joy&2)<>0 THEN ys==+1 y==-2
IF ys=8 THEN
IF cy=68 THEN ys==-1
ELSE cy==+1 ys=0
FI
FI
ELSEIF (joy&1)<>0 THEN ys==-1 y==+1
IF ys=255 THEN
IF cy=0 THEN ys==+1
ELSE cy==-1 ys=7
FI
FI
FI
DO UNTIL vcount=128 OD
ary=@a a=screen*table(cy)+cx j=12
FOR i=0 TO 17 DO
dlist(j+1)=ary(0)
dlist(j+2)=ary(1)
j==+3
a==+bytes
OD
RETURN
PROC MoveMan()
Zero(pmb+y,26) Zero(pmb+256+y,26)
x==+xd y==+yd
hposp(0)=x hposp(1)=x
IF xd>0 THEN face=0
ELSEIF xd<0 THEN face=1 FI
a=pmb+y+(phase RSH 2)
temp=manadr(face)
MoveBlock(a,man0+temp,21)
MoveBlock(a+256,man1+temp,21)
a=pmb+y+1
a==+phase RSH 2
i=rotor(rotoradr(face)+phase)
Poke(a,i) Poke(a+256,i)
Sound(0,phase LSH 2-(yd LSH 3),8,2)
RETURN
PROC GoBoom()
SndRSt()
Zero(missile,256) mx(0)=0 mx(1)=0
Waint(30)
ary=pmb+y
FOR i=0 TO 170 DO
FOR j=1 TO 20 DO
colpm0=64+Rand(8) LSH 1
colpm1=64+Rand(8) LSH 1
wsync=0
OD
k=Rand(24) ary(k)==&Rand(0)
k-Rand(24) ary(k+256)==&Rand(0)
Sound(1,i,4,6)
Wait(1)
OD
Zero(pmb,512)
SndRst() pcolr0=152 pcolr1=118
Wait(20) enable=0
FOR i=0 TO 14 step 2 DO
fore=46-i
Wait(5)
OD
fore=0 Wait(60) hitclr=0
carried=0 whine=0 shake=0 face=0
packs==-1
IF packs=0 THEN end=1 FI
FOR i=0 TO 19 DO
screen(fall(i))=0
fall(i)=0
OD
fuel=50 color=1
Plot(0,5) DrawTo(fuel,5)
color=0
x=84 y=110 cx=0 cy=0 xs=7 ys=0
DoScore() Scroll() MoveMan()
fore=36 enable=1
RETURN
PROG GetCan()
i=x-35 j=y-50
i==RSH 3 j==RSH 3
a=table(j+cy)+i+cx
IF screen(a)=l59 THEN
screen(a)=0
carried==+1
IF carried=11 THEN end=4 FI
whine-200 hitclr=0
FI
RETURN
PROC Falling(CARD bb)
j=screen(bb-64)
IF j=159 OR j=rock THEN
FOR k=10 TO 19 DO
IF fall(k)=0 THEN
fall(k)=bb-64 id(k)=j EXIT
FI
OD
Falling(bb-64)
FI
RETURN
PROC ZapIt(BYTE zz)
atract=0
l=mxd(zz)+2
j=mx(ZZ)-31-1 RSH 2-xs
k=my(ZZ)-72*ys
j==RSH 3 k==RSH 3
missile(my(zz))==&255-mdata(zz)
mx(zz)=0
a=table(cy+k)+cx+j
IF screen(a)=159 THEN end=3 FI
IF screen(a)=rock THEN score==+2 FI
bak=70 fore=12
FOR j=0 TO 10 DO
screen(a)=65
FOR k=1 TO 100 DO OD
screen(a)=0
FOR k=l TO 100 DO OD
Sound(1,200,2,15-j)
OD
bak=0 fore=36 screen(a)=0
Sound(l,0,0,0)
hitclr=0 score==-1 DoScore()
Falling(a)
RETURN
PROC Bump()
i=pxpf(0) j=pxpf(1)
IF (i&1)<>0 OR (j&l)<>0 OR
(i&8)<>0 OR (j&8)<>0 THEN
GoBoom()
ELSEIF (i&2)<>0 OR (j&2)<>0 THEN
ChargeShield()
ELSEIF (i&4)<>0 OR (j&4)<>0 THEN
GetCan()
FI
IF mxpf(0)<>0 THEN ZapIt(0) FI
IF mxpf(l)<>0 THEN ZapIt(l) FI
RETURN
PROC StartMiss()
IF strig(0)=0 and flag=0 THEN
flag=1 mc==!1
IF mx(mc)=0 THEN
Missile(my(mc))==&(255!mdata(mc))
my(mc)=y+10
Missile(my(mc))==%mdata(mc)
mx(mc)=(x+4+face RSH 3)&254
mxd(mc)=face LSH 2-2
FI
FI
flag=Strig(0)!1
RETURN
PROC MoveMiss()
j=2
FOR i=0 TO 1 DO
temp=mx(i)
IF temp<>0 THEN
temp==-mxd(i) hposm(i)=temp
IF x>temp THEN
k=x-temp
ELSE
k=temp-x
FI
Sound(1,k,12,8)
ELSE
j==-1
FI
mx(i)=temp
IF j=0 THEN Sound(1,0,0,0) FI
OD
RETURN
PROC MoveRocks()
FOR i=0 TO 19 DO
temp=fall(i)
IF temp<>0 THEN
IF screen(temp)=0 THEN
temp=0
ELSE
a=temp+64
IF screen(a)<>0 THEN
temp=0
IF id(i)=159 THEN end=3 FI
ELSE
screen(temp)=0
screen(a)=id(i)
temp==+64
FI
FI
FI
fal1(i)=temp
OD
RETURN
PROC CheckRocks()
fallc==-l
IF fallc=0 THEN
fallc=20 MoveRocks()
FI
RETURN
PROC DrawWall(CARD st BYTE cc,in,len)
BYTE ii,jj
CARD tt
screen(st)=1
tt=st+in
FOR ii=1 TO len-2 DO
jj=Rand(2)
screen(tt)=cc+jj
tt==+in
OD
screen(tt)=1
RETURN
PROC DrawCaves()
sdmctl=0 sdslst=dlist
Zero(sc_adr,5120)
Zero(misc_adr,512)
FOR i=0 TO 11 DO
dlist(i)=dldata(i)
OD
a=screen j=12
FOR i=0 TO 17 DO
dlist(j)=64+32+16+6
dlist(j+1)=a&$FF
dlist(j+2)=a RSH 8
j==+3
a==+bytes
OD
dlist(j-3)=128+64+16+6
FOR i=0 to 7 DO
dlist(j+i)=dldata2(i)
OD
txtmsc=misc_adr
FOR i=0 TO 7 DO
Poke(misc_adr+17+i,79+i)
Poke(misc_adr+57+i,87+i)
OD
rowcrs=2 colcrs=0
PrintE("fuel packs:")
colcrs=0
PrintE("shield score:")
PrintE(" by mike stortz")
dindex=6 color=1
Plot(0,5) DrawTo(fuel,5)
Plot(0,7) DrawTo(shield,7)
a=0
FOR i=0 TO 7 DO
FOR j=0 TO 15 DO
k=Rand(32)
IF (k&16)<>0 THEN k==%4 FI
IF (k&l)<>0 THEN
DrawWall(a,3,l,4) FI
IF (k&2)<>0 THEN
DrawWall(a*3,5,bytes,10) FI
IF (k&4)<>0 THEN
DrawWall(a+576,7,1,4)
IF Rand(5)=0 THEN
screen(a+514)=rock
FI
FI
IF (k&8)<>0 THEN
DrawWall(a,9,bytes,10) FI
IF (k&16)<>0 AND
j>0 AND j<15 THEN
screen(a+513)=159 FI
a==+4
OD
a==+576
OD
FOR a=8 TO 68 STEP 10 DO
i=(Rand(14)+1) LSH 2
FOR j=i+1 TO i+2 DO
screen(table(a)+j)=0
screen(table(a+1)+j)=0
screen(table(a+2)+j)=0
OD
OD
screen(69)=95 screen(70)=95
screen(133)=95 screen(134)=95
PmSet()
RETURN
PROC Title()
BYTE t
Graphics(21)
PmSet() ZeroOut()
Zero(Missile,1280)
Zero(misc_adr,3000)
screen=savmsc dlist=sdslst
colr0=150 colr1=146
colr2=40 colr3=68 colr4=64
k=0
FOR i=6 TO 13 DO
FOR j=8 TO 15 DO
screen(j*20+i)=logo(k)
k==+1
OD
OD
FOR i=6 TO 13 DO
FOR j=16 TO 23 DO
screen(j*20+i) = logo (k)
k==+1
OD
OD
dlist(31)=32
dlist(32)=64+32+6
dlist(33)=0
dlist(34)=misc_page
b=misc_adr
FOR i=35 TO 43 DO
dlist(i)=32+6
OD
dlist(44)=6
FOR i=45 TO 52 DO
dlist(i)=0
OD
dindex=0 lmargin=1
dlist(10)=6
savmsc==+100
PrintD(6," last ") PrintID(6,score)
colcrs=10
PrintD(6,"high ") PrintCD(6,high)
savmsc=misc_adr+300
rowcrs=0 colcrs=l
PrintDE(6," reserve ore ")
PrintDE(6,"transport operation")
PrintDE(6," THE CITY OF ")
PrintDE(6,"ARCADIA IS UNDER ")
PrintDE(6,"ATTACK. YOUR JOB ")
PrintDE(6,"IS TO RECOVER FUEL")
PrintDE(6,"CANNISTERS OF HYKE")
PrintDE(6,"AND RETURN THEM TO")
PrintDE(6,"THE UPPER LEFT END")
PrintDE(6,"OF THE CAVERNS. IF")
savmsc==+400 rowcrs=0 colcrs=1
PrintDE(6,"YOUR SCORE EXCEEDS")
PrintDE(6,"1000. ARCADIA HAS ")
PrintDE(6,"HELD OUT LONG ")
PrintDE(6,"ENOUGH FOR HELP TO")
PrintDE(6,"ARRIVE. DON'T ")
PrintDE(6,"SHOOT A CANNISTER ")
PrintDE(6,"OR CARRY MORE THAN")
PrintDE(6,"10 AT A TIME. AND ")
PrintDE(6,"DON'T RUN INTO A ")
PrintDE(6,"WALL. GOOD LUCK! ")
savmsc==+400 rowcrs=0 colcrs=1
PutDE(6)
PrintDE(6," press START")
PrintDE(6," to play")
x=86 y=58 yd=-1 xd=0 ys=0 xs=0
phase=0 l=0
DO
IF yd=-l THEN
yd=0 xd=2 gprior=36
ELSEIF yd=1 THEN
yd=0 xd=-2 gprior=33
ELSEIF xd=-2 THEN
xd=0 yd=-1
ELSE
xd=0 yd=1
FI
FOR t=0 TO 39 DO
IF xd=-2 and x=150 THEN
gprior=36
FI
IF xd=-2 and x=116 THEN
gprior=33
FI
MoveMan()
DoPhase()
l==+1
IF l=2 THEN
l=0 ys==+1
FI
IF ys=8 THEN
ys=0
b==+20
IF b=misc_adr+1320 THEN
b=misc_adr
FI
DO UNTIL vcount=128 OD
dlist(33)=Peek(@b)
dlist(34)=Peek(@b+1) #
FI
Wait(2)
IF consol=6 OR Strig(0)=0 THEN
EXIT
FI
OD
UNTIL consol=6 OR Strig(0)=0 OD
ch=255 SndRst()
RETURN
PROC Init()
skstat=3 audctl=0 high=0 score=0
MoveBlock(cb_adr,57344,1024)
MoveBlock(cb_adr+128,cset,80)
MoveBlock(cb_adr+264,cset+80(208)
MoveBlock(cb_adr+512,cset+288,128)
MoveBlock(cb_adr+632,logo,128)
MoveBlock(cb_adr+760,can,8)
pmb=pmb_page*256+1024
missile=pmb-256
a=0
FOR i=0 TO 79 DO
table(i)=a
a==+bytes
OD
SetVbv(7,Vblank RSH 8,Vblank&$FF)
vdslst=Dli nmien=192
RETURN
PROC LoopInit()
colr0=68 colr1=40 colr4=64
screen=sc_adr dlist=dl_adr
savmsc=misc_adr
PmSet() ZeroOut()
phase=0 face=0 mc=1 flag=0
cx=0 cy=0 xs=7 ys=0 x=84 y=110
bak=0 fore=36 enable=1 fallc=1
packs=3 score=0 fuel=50 shield=50
whine=0 carried=0 end=0
shake=0 shakec=0 xsm=0
FOR i=0 TO 19 DO
id(i)=0 fall(i)=0
OD
mx(0)=0 mx(1)=0
RETURN
PROC GameLoop()
vdslst=Dli nmien=l92
GetDir()
IF fuel=0 THEN
yd=2 joy==%2
ELSE
DoPhase()
FI
MoveMan()
IF x<70 OR x>176 OR
y<90 OR y>172 THEN
Scroll()
ELSE
Wait(1)
FI
CheckFuel()
CheckShake()
CheckRocks()
StartMiss() MoveMiss()
Bump()
IF whine<>0 THEN
whine==-1
Sound(3,whine,10,4)
IF whine=0 THEN
Sound(3,0,0,0)
FI
FI
IF ch<255 THEN
ch=255 SndRst()
DO UNTIL ch<255 OR
consol<>7 OR
Strig(0)=0 OD
ch=255
FI
RETURN
PROC Game()
Init()
DO
Title()
Graphics(0) crsinh=1
LoopInit()
DrawCaves()
DoScore()
color=0
DO
GameLoop()
UNTIL consol<>7 OR end<>0 OD
IF end<>0 THEN EndGame() FI
IF score>0 AND score>high THEN
high=score
FI
OD
SetVbv(7,$E4,$62)
ZeroOut() Graphics(0)
RETURN