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player.asm
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!zone Player
.PSExplode = $80
.PSPhase = $1f
.PSExploded = $20
.PSStartup = $40
.index = $e0
.xposl !byte 0, 0
.xposh !byte 0, 0
.yposl !byte 0, 0
.yposh !byte 0, 0
.xvel !byte 0, 0
.yvel !byte 0, 0
.state !byte 0, 0
.img0 !byte 0, 0
.img1 !byte 0, 0
.img2 !byte 0, 0
.drone !byte 0, 0
.shield !byte 0, 0
.missile !byte 0, 0
.laser !byte 0, 0
.weapon !byte 0, 0
.flame !byte 0, 0
.xdrone !byte 0, 0
.ydrone !byte 0, 0
.xshield !byte 0, 0
.yshield !byte 0, 0
.xpshield !byte -6, 0, 6, 6, 6, 0, -6, -6
.ypshield !byte -5, -5, -5, 0, 6, 6, 6, 0
.xmissilel !byte 0, 0
.xmissileh !byte 0, 0
.ymissilel !byte 0, 0
.ymissileh !byte 0, 0
.vxmissile !byte 0, 0
.vymissile !byte 0, 0
.axmissile !byte 0, 0
.aymissile !byte 0, 0
.tmissile !byte 0, 0
.spritepressure !byte 0
.maxy !byte 192, 192
.maxx !byte 192, 192
.miny !byte 64, 64
.minx !byte 64, 64
.playercolors !byte 14, 7
.playerstarty !byte 80, 60
.Init
lda #$40 + 5
sta Sprites.img + 0
sta Sprites.img + 1
sta Sprites.img + 2
sta Sprites.img + 3
lda #$40 + 159
sta Sprites.img + 6
sta Sprites.img + 7
lda #0
sta Sprites.color + 6
sta Sprites.color + 7
lda .playercolors + 0
sta Sprites.color + 0
lda .playercolors + 1
sta Sprites.color + 1
lda #7
sta Sprites.color + 2
sta Sprites.color + 3
lda #0
sta .spritepressure
ldx #0
-
lda #128 + 28
sta .maxx, x
sta .maxy, x
lda #128 - 28
sta .minx, x
sta .miny, x
lda #.PSStartup
sta .state, x
lda #0
sta .xposl, x
sta .yposl, x
sta .yvel, x
lda #10
sta .xposh, x
lda .playerstarty, x
sta .yposh, x
lda #$1f
sta .xvel, x
lda #0
sta .drone, x
sta .shield, x
sta .laser, x
sta .weapon, x
sta .flame, x
sta .missile, x
inx
cpx #2
bne -
rts
.Restart
ldx .index
lda #$40 + 5
sta Sprites.img + 0, x
sta Sprites.img + 2, x
lda .playercolors, x
sta Sprites.color + 0, x
lda #7
sta Sprites.color + 2, x
lda #128 + 28
sta .maxx, x
sta .maxy, x
lda #128 - 28
sta .minx, x
sta .miny, x
lda #.PSStartup
sta .state, x
lda #0
sta .xposl, x
sta .yposl, x
sta .yvel, x
lda #10
sta .xposh, x
lda .playerstarty, x
sta .yposh, x
lda #$1f
sta .xvel, x
lda #0
sta .drone, x
sta .shield, x
sta .missile, x
jsr Status.ResetMultiplier
lda PlayerWeapon.type, x
cmp #PlayerWeapon.WTSlug
bne ++
lda .weapon, x
beq +
sec
sbc #1
sta .weapon, x
+ ora #PlayerWeapon.WTSlug
jmp PlayerWeapon.Select
++
cmp #PlayerWeapon.WTLaser
bne ++
lda .laser, x
beq +
sec
sbc #1
sta .laser, x
+ ora #PlayerWeapon.WTLaser
jmp PlayerWeapon.Select
++
cmp #PlayerWeapon.WTFlame
bne ++
lda .flame, x
beq +
sec
sbc #1
sta .flame, x
+ ora #PlayerWeapon.WTFlame
jmp PlayerWeapon.Select
++
rts
.AddBonus
pha
lda #<Sound.BonusSound
ldy #>Sound.BonusSound
jsr Sound.PlaySound
pla
asl
asl
sta .abonus + 1
.abonus bne * + 2
jmp .abweapon
nop
jmp .ablaser
nop
jmp .abdrone
nop
jmp .abshield
nop
jmp .abmissile
nop
jmp .ablife
nop
jmp .abspeed
nop
jmp .abflame
nop
.txtweapon !text "WEAPONS UPGRADE LEVEL 0", 0
.abweapon
ldx .index
ldy .weapon, x
lda #PlayerWeapon.WTSlug
cmp PlayerWeapon.type
bne +
iny
cpy #4
bcs +
tya
sta .weapon, x
lda #PlayerWeapon.WTSlug
+
ora .weapon, x
jsr PlayerWeapon.Select
lda .weapon, x
clc
adc #49
sta .abweapon - 2
lda #<.txtweapon
ldy #>.txtweapon
jmp Starfield.QueueText
.txtlaser !text "LASER BEAM UPGRADE LEVEL 0", 0
.ablaser
ldx .index
ldy .laser, x
lda #PlayerWeapon.WTLaser
cmp PlayerWeapon.type
bne +
iny
cpy #4
bcs +
tya
sta .laser, x
lda #PlayerWeapon.WTLaser
+
ora .laser, x
jsr PlayerWeapon.Select
lda .laser, x
clc
adc #49
sta .ablaser - 2
lda #<.txtlaser
ldy #>.txtlaser
jmp Starfield.QueueText
.txtflame !text "PLASMA BURST UPGRADE LEVEL 0", 0
.abflame
ldx .index
ldy .flame, x
lda #PlayerWeapon.WTFlame
cmp PlayerWeapon.type
bne +
iny
cpy #4
bcs +
tya
sta .flame, x
lda #PlayerWeapon.WTFlame
+
ora .flame, x
jsr PlayerWeapon.Select
lda .flame, x
clc
adc #49
sta .abflame - 2
lda #<.txtflame
ldy #>.txtflame
jmp Starfield.QueueText
.txtdrone !text "PROTECTOR DRONE ENGAGED", 0
.abdrone
ldx .index
lda #0
sta .shield, x
sta .missile, x
lda #1
sta .drone, x
lda #<.txtdrone
ldy #>.txtdrone
jmp Starfield.QueueText
.txtshield !text "PHASE SHIELD AT MAXIMUM", 0
.abshield
ldx .index
lda #3
sta .shield, x
lda #0
sta .drone, x
sta .missile, x
lda #<.txtshield
ldy #>.txtshield
jmp Starfield.QueueText
.txtmissile !text "HOMING MISSILES ACTIVE", 0
.abmissile
ldx .index
lda #1
sta .missile, x
lda #0
sta .drone, x
sta .shield, x
lda #<.txtmissile
ldy #>.txtmissile
jmp Starfield.QueueText
.ablife
jsr Status.AddLive
rts
.txtspeedup !text "SPEED UP", 0
.abspeed
ldx .index
lda .maxx, x
cmp #128 + 96
bvs +
clc
adc #4
sta .maxx, x
sta .maxy, x
sec
lda .minx, x
sbc #4
sta .minx, x
sta .miny, x
lda #<.txtspeedup
ldy #>.txtspeedup
jmp Starfield.QueueText
+
rts
.BonusCollision
ldy .index
lda .xposh, y
clc
adc #8
sta tmpx
lda .yposh, y
clc
adc #7
sta tmpy
ldx Enemies.head
bpl .bloop
rts
.bloop
lda Enemies.pflags, x
and #Enemies.PFBonus
beq .bmiss
lda tmpx
sec
sbc Enemies.xposh, x
bcc .bmiss
sbc #4
bcc +
cmp Enemies.xsize, x
bcs .bmiss
+
lda tmpy
sec
sbc Enemies.yposh, x
bcc .bmiss
sbc #4
bcc +
cmp Enemies.ysize, x
bcs .bmiss
+
lda Enemies.type, x
pha
jsr Enemies.Free
pla
jsr .AddBonus
jmp .bempty
.bmiss
lda Enemies.succ,x
tax
bmi .bempty
jmp .bloop
.bempty
rts
.Collision
ldy .index
lda .xposh, y
clc
adc #8
sta tmpx
adc #16
cmp Enemies.minx
bcs +
jmp .enone
+
lda .yposh, y
clc
adc #7
sta tmpy
ldx Enemies.head
bpl .eloop
rts
.eloop
lda Enemies.pflags, x
bpl .emiss
lda tmpx
sec
sbc Enemies.xposh, x
bcc .emiss
sbc #4
bcc +
cmp Enemies.xsize, x
bcs .emiss
+
lda tmpy
sec
sbc Enemies.yposh, x
bcc .emiss
sbc #4
bcc +
cmp Enemies.ysize, x
bcs .emiss
+
lda Enemies.pflags, x
and #Enemies.PFBonus
beq +
lda Enemies.type, x
pha
jsr Enemies.Free
pla
jsr .AddBonus
rts
+
lda Enemies.sflags, x
and #Enemies.SFExplodes + Enemies.SFShot
beq ++
and #Enemies.SFExplodes
bne +
jsr Enemies.Free
jmp ++
+
lda #4
jsr Enemies.Explode
++
ldy .index
lda .shield, y
beq +
sec
sbc #1
sta .shield, y
rts
+
jsr .Explode
rts
.emiss
lda Enemies.succ,x
tax
bpl .eloop
.enone
ldy .index
lda .drone, y
beq .dnone
lda .ydrone, y
clc
adc #2
sta tmpy
lda .xdrone, y
clc
adc #2
sta tmpx
adc #12
cmp Enemies.minx
bcc .dnone
ldx Enemies.head
bpl .dloop
rts
.dloop
lda Enemies.sflags, x
bpl .dmiss
and #Enemies.SFExplodes
beq .dmiss
lda tmpy
sec
sbc Enemies.yposh, x
cmp Enemies.ysize, x
bcs .dmiss
lda tmpx
sec
sbc Enemies.xposh, x
cmp Enemies.xsize, x
bcs .dmiss
lda #2
jsr Enemies.Explode
.dmiss
lda Enemies.succ,x
tax
bpl .dloop
.dnone
ldy .index
lda .missile, y
bpl .mnone
ldx Enemies.head
bpl .mloop
rts
.mloop
lda Enemies.sflags, x
bpl .mmiss
lda .ymissileh, y
clc
adc #3
sec
sbc Enemies.yposh, x
cmp Enemies.ysize, x
bcs .mmiss
lda .xmissileh, y
clc
adc #3
sec
sbc Enemies.xposh, x
cmp Enemies.xsize, x
bcs .mmiss
lda #1
sta .missile, y
lda Enemies.sflags, x
and #Enemies.SFExplodes
beq .mmiss
lda #8
jsr Enemies.Explode
.mmiss
lda Enemies.succ,x
tax
bpl .mloop
.mnone
rts
.FireMissile
ldy .index
lda #$80
sta .missile, y
lda .xposl, y
sta .xmissilel, y
lda .xposh, y
sta .xmissileh, y
lda .yposl, y
sta .ymissilel, y
lda .yposh, y
clc
adc #6
sta .ymissileh, y
lda #0
sta .aymissile, y
lda #1
sta .axmissile, y
lda #32
sta .vxmissile, y
lda #2
sta .vymissile, y
lda #$40 + 8
sta .img2, y
ldx Enemies.head
bmi ++
-
lda Enemies.sflags, x
and #Enemies.SFExplodes
bne ++
lda Enemies.succ, x
tax
bpl -
++ txa
sta .tmissile, y
rts
.ImgMissile !byte $48, $4e, $48, $49, $48, $4f, $48, $48, $48, $48, $48, $4b, $4c, $4d, $48, $4a
.MoveMissile
ldy .index
ldx .tmissile, y
bmi +++
lda Enemies.sflags, x
and #Enemies.SFExplodes
bne +
lda #$ff
sta .tmissile, y
jmp +++
+
lda .xmissileh, y
sta tmpx
lda .ymissileh, y
sta tmpy
ldy #0
sec
lda Enemies.xposh, x
sbc tmpx
bcs +
cmp #$f7
bcs ++
dey
jmp ++
+ cmp #8
bcc ++
iny
++ sty tmpx
ldy #0
sec
lda Enemies.yposh, x
sbc tmpy
bcs +
cmp #$f7
bcs ++
dey
jmp ++
+ cmp #8
bcc ++
iny
++ sty tmpy
ldy .index
lda tmpx
sta .axmissile, y
lda tmpy
sta .aymissile, y
+++
lda .axmissile, y
asl
asl
clc
adc .aymissile, y
and #15
tax
lda .ImgMissile, x
sta .img2, y
clc
lda .axmissile, y
adc .vxmissile, y
bvs +
sta .vxmissile, y
* lda .vxmissile, y
ldx #0
asl
bcc +
dex
dex
+ asl
bcc +
inx
+ clc
adc .xmissilel, y
sta .xmissilel, y
txa
adc .xmissileh, y
sta .xmissileh, y
cmp #160
bcc +
lda #1
sta .missile, y
+
clc
lda .aymissile, y
adc .vymissile, y
bvs +
sta .vymissile, y
+ lda .vymissile, y
ldx #0
asl
bcc +
dex
dex
+ asl
bcc +
inx
+ clc
adc .ymissilel, y
sta .ymissilel, y
txa
adc .ymissileh, y
sta .ymissileh, y
cmp #120
bcc +
lda #1
sta .missile, y
+
rts
.ShieldColors !byte 0, 2, 7, 14
.ShieldOffset !byte 0, 3
.DroneOffset !byte 0, 16
.Move
ldx .index
lda .xvel, x
beq ++
bmi +
sec
sbc #1
bcs ++
+ clc
adc #1
++ sta .xvel, x
lda Input.dx, x
beq ++
cmp Input.pdx, x
beq +
lda #<Sound.PlayerMoveForwardSound
ldy #>Sound.PlayerMoveForwardSound
jsr Sound.PlaySound
lda Input.dx, x
+
asl
asl
asl
clc
adc .xvel, x
eor #$80
cmp .maxx, x
bcc +
lda .maxx, x
+ cmp .minx, x
bcs +
lda .minx, x
+ eor #$80
sta .xvel, x
++
lda .yvel, x
beq ++
bmi +
sec
sbc #2
bcs ++
+ clc
adc #2
++ sta .yvel, x
lda Input.dy, x
beq ++
cmp Input.pdy, x
beq +
lda #<Sound.PlayerMoveUpSound
ldy #>Sound.PlayerMoveUpSound
jsr Sound.PlaySound
lda Input.dy, x
+
asl
asl
asl
clc
adc .yvel, x
eor #$80
cmp .maxy, x
bcc +
lda .maxy, x
+ cmp .miny, x
bcs +
lda .miny, x
+ eor #$80
sta .yvel, x
++
ldy .xvel, x
clc
lda .xposl, x
adc Math.asl3, y
sta .xposl, x
lda .xposh, x
adc Math.asr5, y
cmp #14
bcs +
lda #14
+ cmp #160
bcc +
lda #159
+
sta .xposh, x
ldy .yvel, x
clc
lda .yposl, x
adc Math.asl3, y
sta .yposl, x
lda .yposh, x
adc Math.asr5, y
cmp #27
bcs +
lda #27
+ cmp #98
bcc +
lda #97
+
sta .yposh, x
lda #$42
ldy .yvel, x
beq ++
bpl +
lda #$41
cpy #$d0
bcs ++
lda #$40
bne ++
+
lda #$43
cpy #$30
bcc ++
lda #$44
++
sta .img0, x
lda Input.dx, x
clc
adc #$40 + 6
sta .img1, x
jsr PlayerWeapon.Fire
ldx .index
lda .drone, x
beq +
lda Phase
adc .DroneOffset, x
and #63
tay
lda Math.sin20, y
clc
adc Player.xposh, x
sta .xdrone, x
tya
clc
adc #16
and #63
tay
lda Math.sin20, y
clc
adc Player.yposh, x
sta .ydrone, x
lda Phase
lsr
lsr
and #7
ora #$40 + 80
sta .img2, x
+
ldy .shield, x
beq +
lda .ShieldColors, y
sta Sprites.color + 4, x
lda Phase
clc
adc .ShieldOffset, x
and #7
tay
lda .xpshield, y
clc
adc Player.xposh, x
sta .xshield, x
lda .ypshield, y
clc