mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-22 14:33:51 +00:00
547 lines
12 KiB
QBasic
547 lines
12 KiB
QBasic
include fixed_point_math.asm
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rem Zombie Chase
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rem A fun game that may help you learn batari Basic!
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rem
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rem timed game, 16 levels
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rem Each level lasts about one minute
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rem you must score 1000 points to move on
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rem COLOR/BW switch selects joystick or DC
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rem left difficulty A=stop on collision; B=slow down on collision
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rem right difficulty A=L/R border; B=no border
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set kernel_options no_blank_lines player1colors
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playfieldpos=4
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set smartbranching on
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dim carpos=a
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dim turndelay=b
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dim collcount=b
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dim carframe=c
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dim gamebits=e
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dim velocity=f.f
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dim xvelocity=g.g
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dim yvelocity=h.h
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dim tempvel=i.i
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dim finalxvelocity=l.l
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dim finalyvelocity=m.m
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dim p0x=player0x.j
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dim p0y=player0y.k
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dim last=n
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dim scadd=o
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dim timer1=p
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dim timer2=q
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dim level=q
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rem level bits
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rem bit 0: zombie speed (slow/fast)
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rem bit 1: zombie movement (random/run away)
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rem bit 2: car speed (slow/fast)
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rem bit 3: road surface (pavement/ice)
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dim tempvel8=temp1.temp2
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dim zombievel=temp5.temp6
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dim zombiexvel=r
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dim zombieyvel=s
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dim zombiefinalxvel=t
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dim zombiefinalyvel=u
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dim zombiexpos=player1x.v
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dim zombieypos=player1y.w
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dim sc1=score
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dim sc2=score+1
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rem
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rem velocity doesn't change when direction changes
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rem xvelocity and yvelocity change
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rem they change instantly when velocity <= 0.5 max
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rem they change gradually when velocity > 0.5 max
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carpos = 4
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rem turndelay = 0
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player0x = 40 : player0y = 40
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startLoop
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if turndelay{1} then player1:
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%00100010
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%00010100
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%00111110
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%00111111
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%00011011
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%11111001
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%00101000
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%00010000
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end
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if !turndelay{1} then player1:
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%00010100
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%00100010
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%00111110
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%00111111
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%00011011
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%11111010
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%00101000
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%00010000
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end
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player1color:
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$38;
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$3A;
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$F4;
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$F6;
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$0C;
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$1A;
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$D8;
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$D2;
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end
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scorecolor=30
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if switchreset then reboot
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if switchrightb then PF0=0 else PF0=63
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COLUPF=(level * 16)^244
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if gamebits{7} then gamerunning
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if !joy0fire then timer1=timer1+1
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if timer1=0 then nostartgame
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if joy0fire then score=0:timer1=0:timer2=0:gamebits{7}=1:pfclear
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nostartgame
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AUDV0=0:AUDV1=0:goto hitwall
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gamerunning
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timer1=timer1+1:if timer1=0 then timer2=timer2+$10
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if timer2<$C0 then notendlevel
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temp1=level & $0F
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temp2=sc1*16+sc2/16
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temp1=level & $0F
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if temp2<gonextlevel[temp1] && timer1{5} then scorecolor=64
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if timer2<$F0 then notendlevel
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if temp2>=gonextlevel[temp1] then level=level+$11:pfclear else gamebits{7}=0
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notendlevel
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gosub movezombie
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if collcount<16 then skipcrashsound
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collcount=collcount-16
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AUDV0=collcount/16
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AUDC0=8
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if collcount{3} then AUDF0=(collcount&rand)/8 else AUDF0=17
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goto skipenginesound
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skipcrashsound
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collcount{3}=0
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AUDV0=10:AUDC0=2
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AUDF0=18-f/4:if f>67 then AUDF0=1
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skipenginesound
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if joy0fire then velocity=velocity+0.0625:goto nomove1
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gamebits=gamebits^%00000100
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if gamebits{2} then nomove1
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velocity=velocity-0.0625
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nomove1
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if level{2} then temp1=96 else temp1=64
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if gamebits{4} then temp1=16
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if velocity > temp1 && velocity < 192 then velocity=velocity-0.0625
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if velocity>240 then velocity=0
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if !level{3} then COLUBK=0 else COLUBK=154
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on carpos goto a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13 a14 a15
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a0 rem 0 (due north, or up)
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xvelocity=0:yvelocity=0-velocity
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goto skipskid
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a1 rem 22.5
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tempvel=velocity/8
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xvelocity=tempvel:yvelocity=tempvel-velocity
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tempvel=velocity/4
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xvelocity=xvelocity+tempvel
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goto skipskid
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a2 rem 45
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tempvel=velocity/4
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xvelocity=velocity/2
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if xvelocity{7} then xvelocity=xvelocity | %10000000
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xvelocity=xvelocity+tempvel:yvelocity=0-xvelocity
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goto skipskid
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a3 rem 67.5
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tempvel=velocity/8
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xvelocity=velocity-tempvel:yvelocity=0-tempvel
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tempvel=velocity/4
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yvelocity=yvelocity-tempvel
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goto skipskid
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a4 rem 90
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xvelocity=velocity:yvelocity=0
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goto skipskid
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a5 rem 112.5
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tempvel=velocity/8
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xvelocity=velocity-tempvel:yvelocity=tempvel
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tempvel=velocity/4
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yvelocity=yvelocity+tempvel
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goto skipskid
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a6 rem 135
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tempvel=velocity/4
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xvelocity=velocity/2
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if xvelocity{7} then xvelocity=xvelocity | %10000000
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xvelocity=xvelocity+tempvel:yvelocity=xvelocity
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goto skipskid
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a7 rem 157.5
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tempvel=velocity/8
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xvelocity=tempvel:yvelocity=velocity-tempvel
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tempvel=velocity/4
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xvelocity=xvelocity+tempvel
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goto skipskid
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a8 rem 180
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xvelocity=0:yvelocity=velocity
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goto skipskid
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a9 rem 202.5
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tempvel=velocity/8
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xvelocity=0-tempvel:yvelocity=velocity-tempvel
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tempvel=velocity/4
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xvelocity=xvelocity-tempvel
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goto skipskid
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a10 rem 225
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tempvel=velocity/4
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xvelocity=velocity/2
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yvelocity=tempvel+xvelocity:xvelocity=0-xvelocity
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goto skipskid
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a11 rem 247.5
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tempvel=velocity/8
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xvelocity=tempvel-velocity:yvelocity=tempvel
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tempvel=velocity/4
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yvelocity=yvelocity+tempvel
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goto skipskid
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a12 rem 270
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xvelocity=0-velocity:yvelocity=0
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goto skipskid
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a13 rem 292.5
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tempvel=velocity/8
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xvelocity=tempvel-velocity:yvelocity=0-tempvel
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tempvel=velocity/4
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yvelocity=yvelocity-tempvel
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goto skipskid
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a14 rem 315
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tempvel=velocity/4
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xvelocity=velocity/2
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xvelocity=tempvel+xvelocity:xvelocity=0-xvelocity:yvelocity=xvelocity
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goto skipskid
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a15 rem 337.5
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tempvel=velocity/8
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xvelocity=0-tempvel:yvelocity=tempvel-velocity
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tempvel=velocity/4
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xvelocity=xvelocity-tempvel
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skipskid
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if velocity{7} then reboot
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if !gamebits{0} then finalxvelocity=xvelocity:finalyvelocity=yvelocity:AUDV1=0:goto noskid else skid
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if velocity<32 then finalxvelocity=xvelocity:finalyvelocity=yvelocity:AUDV1=0:goto noskid
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if finalxvelocity = xvelocity && finalyvelocity = yvelocity then AUDV1=0:goto noskid
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skid
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rem lost traction...skid
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gamebits{5}=0
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gamebits{6}=0
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if xvelocity>127 && finalxvelocity>127 then bothxneg
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if xvelocity<128 && finalxvelocity<128 then bothxpos
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if xvelocity>127 then subx else addx
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bothxneg
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temp1=(finalxvelocity ^ xvelocity) & %11111100
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if temp1=0 then finalxvelocity=xvelocity:gamebits{5}=1:goto checky
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if finalxvelocity<xvelocity then addx
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subx
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if level{3} then finalxvelocity=finalxvelocity-0.0625 else finalxvelocity=finalxvelocity-0.3
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goto checky
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bothxpos
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temp1=(finalxvelocity ^ xvelocity) & %11111100
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if temp1=0 then finalxvelocity=xvelocity:gamebits{5}=1:goto checky
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if finalxvelocity>xvelocity then subx
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addx
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if level{3} then finalxvelocity=finalxvelocity+0.0625 else finalxvelocity=finalxvelocity+0.3
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checky
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if yvelocity>127 && finalyvelocity>127 then bothyneg
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if yvelocity<128 && finalyvelocity<128 then bothypos
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if yvelocity>127 then suby else addy
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bothyneg
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temp1=(finalyvelocity ^ yvelocity) & %11111100
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if temp1=0 then finalyvelocity=yvelocity:gamebits{6}=1:goto doneskid
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if finalyvelocity<yvelocity then addy
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suby
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if level{3} then finalyvelocity=finalyvelocity-0.0625 else finalyvelocity=finalyvelocity-0.3
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goto doneskid
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bothypos
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temp1=(finalyvelocity ^ yvelocity) & %11111100
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if temp1=0 then finalyvelocity=yvelocity:gamebits{6}=1:goto doneskid
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if finalyvelocity>yvelocity then suby
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addy
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if level{3} then finalyvelocity=finalyvelocity+0.0625 else finalyvelocity=finalyvelocity+0.3
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doneskid
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if gamebits{5} && gamebits{6} then gamebits{0}=0:AUDV1=0:goto noskid
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rem skid sound
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temp6=rand
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if temp1{6} then AUDV1=9
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rem if temp6{0} then AUDC1=3:AUDF1=0 else AUDC1=3:AUDF1=1
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rem AUDV1=temp6&3
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if level{3} then temp1=8 else temp1=20
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AUDC1=temp1
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if temp6{0} then AUDF1=temp1+4 else AUDF1=temp1+5
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noskid
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rem gamebits=gamebits^%00000010
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rem if gamebits{1} then donotadd
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tempvel8=finalxvelocity
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asm
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lda temp1
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asl
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ror temp1
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ror temp2
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end
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p0x=p0x+tempvel8
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tempvel8=finalyvelocity
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asm
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lda temp1
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asl
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ror temp1
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ror temp2
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end
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p0y=p0y+tempvel8
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donotadd
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if player0x>200 then player0x=159:goto wrap
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if player0x>159 then player0x=0
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wrap
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if player0y>200 then player0y=96
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if player0y>96 then player0y=0
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if switchbw then driving
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turndelay = turndelay + 1
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turndelay = turndelay & %11111011
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temp1=turndelay&3
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if temp1 <> 0 goto SameFrame
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if joy0left then carpos=carpos-1:gamebits{0}=1
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if joy0right then carpos=carpos+1:gamebits{0}=1
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goto nodriving
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driving rem read driving controller
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temp1=SWCHA & %00110000
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temp1=temp1/16
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on last goto d00 d01 d10 d11
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d00 on temp1 goto nomove left right nomove
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d01 on temp1 goto right nomove nomove left
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d11 on temp1 goto nomove right left nomove
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d10 on temp1 goto left nomove nomove right
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rem done with reading code
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left carpos=carpos-1:gamebits{0}=1
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goto nomove
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right carpos=carpos+1:gamebits{0}=1
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nomove
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last=temp1
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nodriving
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carpos=carpos & 15
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gosub carFrame
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SameFrame
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COLUP0 = 14
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REFP0=gamebits
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if scadd>0 then scadd=scadd-1:score=score+1
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if !collision(player0,player1) then nohitzombie
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scadd=scadd+f
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collcount=collcount|$F8
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if player1x<16 || player1x>143 then notombstone
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temp1=(player1x-16)/4:temp2=(player1y-4)/8
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pfpixel temp1 temp2 on
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notombstone
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player1x=rand&63+48:if player1x{0} then player1y=0 else player1y=90
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nohitzombie
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if gamebits{4} then insidewall
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if collcount>16 then hitwall
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if !collision(player0,playfield) then insidewall
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if !switchleftb then velocity=0
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gamebits{4}=1:collcount=collcount | $F0:collcount{3}=0:goto hitwall
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insidewall
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if !collision(player0,playfield) then gamebits{4}=0:goto hitwall
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if velocity>16 then velocity=velocity-0.1875
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hitwall
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drawscreen
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goto startLoop
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carFrame
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carframe = 0
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if carpos < 9 then carframe = carpos : gamebits{3}= 0
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if carpos >= 9 then carframe = 16 - carpos : gamebits{3} = 1
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on carframe goto 5 10 20 30 40 50 60 70 80
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5 player0:
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%11000011
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%11111111
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%11011011
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%00011000
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%11011011
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%11111111
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%11011011
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%00011000
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end
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goto doneSetFrame
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10 player0:
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%00000110
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%00111110
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%11110000
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%11011011
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%00011111
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%11111000
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%11001100
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%00000100
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end
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goto doneSetFrame
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20 player0:
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%00001100
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%00001100
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%00110011
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%00111011
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%11011100
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%11001100
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%00110010
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%00110000
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end
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goto doneSetFrame
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30 player0:
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%00110110
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%00110110
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%01100100
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%01111110
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%01011110
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%11001011
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%11011000
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%00011000
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end
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goto doneSetFrame
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40 player0:
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%11101110
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%11101110
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%01000100
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%01111111
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%01111111
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%01000100
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%11101110
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%11101110
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end
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goto doneSetFrame
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50 player0:
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%00011000
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%11011000
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%11001011
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%01011110
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%01111110
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%01100100
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%00110110
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%00110110
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end
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goto doneSetFrame
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60 player0:
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%00110000
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%00110010
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%11001100
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%11011100
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%00111011
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%00110011
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%00001100
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%00001100
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end
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goto doneSetFrame
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70 player0:
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%00000100
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%11001100
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%11111000
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%00011111
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%11011011
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%11110000
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%00111110
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%00000110
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end
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goto doneSetFrame
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80 player0:
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%00011000
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%11011011
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%11111111
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%11011011
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%00011000
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%11011011
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%11111111
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%11000011
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end
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doneSetFrame
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return
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movezombie
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temp1=zombiexvel&252:temp2=zombieyvel&252:temp3=zombiefinalxvel&252:temp4=zombiefinalyvel&252
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if temp1<>temp3 then check24
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zombiefinalxvel=rand
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if level{1} then temp1=player1x-player0x:zombiefinalxvel{7}=temp1{7}
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check24
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if temp2<>temp4 then donecheck24
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zombiefinalyvel=rand
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if level{1} then temp1=player1y-player0y:zombiefinalyvel{7}=temp1{7}
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donecheck24
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if zombiexvel{7} && !zombiefinalxvel{7} then zombiexvel=zombiexvel+1:goto donex
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if !zombiexvel{7} && zombiefinalxvel{7} then zombiexvel=zombiexvel-1:goto donex
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if zombiexvel>zombiefinalxvel then zombiexvel=zombiexvel-1 else zombiexvel=zombiexvel+1
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donex
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if zombieyvel{7} && !zombiefinalyvel{7} then zombieyvel=zombieyvel+1:goto doney
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if !zombieyvel{7} && zombiefinalyvel{7} then zombieyvel=zombieyvel-1:goto doney
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if zombieyvel>zombiefinalyvel then zombieyvel=zombieyvel-1 else zombieyvel=zombieyvel+1
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doney
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temp5=0
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if zombiexvel{7} then temp5=255
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temp3=0
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if zombieyvel{7} then temp3=255
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temp6=zombiexvel:temp4=zombieyvel
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zombiexpos=zombiexpos+zombievel
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temp6=temp4:temp5=temp3
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zombieypos=zombieypos+zombievel
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if player1y>100 then player1y=0
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if player1y>$50 then zombiefinalyvel=(zombiefinalyvel^127)|128:zombieyvel=(zombieyvel^127)|128
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if player1y<10 then zombiefinalyvel=(zombiefinalyvel^127)&127:zombieyvel=(zombieyvel^127)&127
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if player1x>200 then player1x=player1x+160
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if player1x>160 then player1x=player1x-160
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REFP1=zombiexvel/16
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return
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data gonextlevel
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1,2,3,4,5,6,7,8,9,$10,$11,$12,$13,$14,$15,$99
|
|
end
|
|
|
|
vblank
|
|
if gamebits{7} && level{0} then gosub movezombie
|
|
return
|