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e-boss.asm
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;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
;
.module BOSSKEY
;
_XPL = OUSER+3
_XPH = OUSER+4
_HEALTH = OUSER+5
_COUNT = OUSER+6
_DOORL = OUSER+7
_DOORH = OUSER+8
BOSSHITS = 3
bosskey:
ld l,(iy+OUSER+0) ; hl = x
ld h,(iy+OUSER+1)
ld (iy+_XPL),l
ld (iy+_XPH),h
ld a,(iy+OUSER+2) ; = y
call mulby600
add hl,de ; hl = x + 600 * (y-1)
ld de,D_BUFFER
add hl,de
ld (iy+OUSER+0),l ; hl = x
ld (iy+OUSER+1),h
ld (iy+OUSER+2),16 ; resdy for copying to explosion, short one please
ld bc,bossmine
call objectafterthis
ld hl,579+D_BUFFER+600
_close0:
ld (iy+_COUNT),11
ld (iy+_DOORL),l
ld (iy+_DOORH),h
ld a,SFX_WALL
call AFXPLAY
_close1:
YIELD
dec (iy+_COUNT)
jr nz,_close1
ld l,(iy+_DOORL)
ld h,(iy+_DOORH)
ld a,1
call char2dlist
set 7,h
res 6,h
ld (hl),1
ld de,600
add hl,de
ld a,(hl)
res 7,h
set 6,h
and a
jr z,_close0
_reset:
ld (iy+_HEALTH),BOSSHITS
_loop:
YIELD
ld a,(collision)
cp $ff
jr nz,_subddeathtest
call startexplosion
ldi
ldi
ldi
ld l,(iy+OUSER+0)
ld h,(iy+OUSER+1)
ld de,$4000
add hl,de
ld (hl),$8b ; $8d
_subddeathtest:
and a
DIENZ
ld a,(bda) ; don't trigger the boss door if it's active
and a
jr nz,_reset
ld hl,(bulletHitX)
ld a,l
or h
jr z,_loop ; skip column check if no x position reported
ld e,(iy+_XPL) ; column check
ld d,(iy+_XPH)
and a
sbc hl,de
jr nz,_loop
dec (iy+_HEALTH)
jr nz,_loop
call startexplosion
ldi
ldi
ldi
ld bc,bossdoor
call objectafterthis
jr _reset
;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
;
.module BOSSMINER
;
_CXL = OUSER+0
_CXH = OUSER+1
_CY = OUSER+2
_TIMER = OUSER+3
bossmine:
ld (iy+_CXL),582 & 255
ld (iy+_CXH),582 / 256
ld (iy+_CY), 9
ld (iy+_TIMER),250
_waitloop:
YIELD
YIELD
YIELD
ld a,(collision)
and a
DIENZ
dec (iy+_TIMER)
jr nz,_waitloop
_appearloop:
YIELD
ld a,(collision)
and a
DIENZ
ld a,(iy+_TIMER)
sra a
sra a
sra a
and $fe
add a,$81
ld (D_BUFFER+582+(9*600)),a
inc (iy+_TIMER)
ld a,(iy+_TIMER)
cp 64
jr nz,_appearloop
ld bc,minearise
call objectafterthis
ldi
ldi
ldi
YIELD
jr bossmine
;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
;
.module BOSSDOOR
;
bda:
.byte 0
bossdoor:
ld hl,bda ; lock
inc (hl)
ld a,$1f
call _setchr
ld (iy+OUSER+0),20
_loop00:
YIELD
ld a,(bosshitted)
and a
jr nz,_closenow
dec (iy+OUSER+0)
jr nz,_loop00
ld a,$29
call _setchr
ld (iy+OUSER+0),75
_loop01:
YIELD
ld a,(bosshitted)
and a
jr nz,_closenow
dec (iy+OUSER+0)
jr nz,_loop01
_closenow:
ld a,$1f
call _setchr
ld (iy+OUSER+0),20
_loop02:
YIELD
dec (iy+OUSER+0)
jr nz,_loop02
_close2:
ld a,$01
call _setchr
ld hl,bda
dec (hl)
xor a
ld (bosshitted),a
DIE
_setchr:
ld hl,595+(600*5)+D_BUFFER
ld de,595+(600*5)+D_BUFFER+$4000
ld (hl),a
ld (de),a
ret
bosshitted:
.byte 0
;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
;
.module BOSS
;
boss:
ld hl,597+(600*5)+D_BUFFER
ld (iy+OUSER+0),l
ld (iy+OUSER+1),h
ld (iy+OUSER+2),0
ld (iy+OUSER+3),BOSSHITS ; boss hit count
xor a
ld (bosshitted),a
_loop:
YIELD
ld a,(collision)
and a
DIENZ
ld hl,(bulletHitX)
ld a,l
or h
jr z,_loop ; skip column check if no x position reported
ld de,597
and a
sbc hl,de
jr nz,_loop
ld bc,5
call addscore
call displayscore
call startexplosion
ldi
ldi
ldi
ld hl,bosshitted
inc (hl)
dec (iy+OUSER+3)
jr nz,_loop
ld a,$ff
ld (collision),a ; turn off shooters, quit gameloop
ld (iy+OUSER+3),3
_bigbangreset:
ld (iy+OUSER+2),30
ld hl,_explosequence
_bigbangloop:
ld (iy+OUSER+4),l
ld (iy+OUSER+5),h
ld a,(hl)
ld b,a
and $0f
call mulby600
ld hl,D_BUFFER+590
add hl,de
ld a,b
and $f0
rrca
rrca
rrca
rrca
ld d,0
ld e,a
add hl,de
ld (iy+OUSER+0),l
ld (iy+OUSER+1),h
ld de,$4000
add hl,de
ld (hl),0
call startexplosion
ldi
ldi
ldi
ld a,r
and 7
add a,3
ld (iy+OUSER+6),a
-: YIELD
dec (iy+OUSER+6)
jr nz,{-}
ld l,(iy+OUSER+4)
ld h,(iy+OUSER+5)
inc hl
dec (iy+OUSER+2)
jr nz,_bigbangloop
ld hl,bossexit ; install the sub remote controller
ld (submvfunc),hl
dec (iy+OUSER+3)
jr nz,_bigbangreset
; 2 second delay
ld (iy+OUSER+3),100
-: YIELD
ld bc,1
call addscore
call displayscore
dec (iy+OUSER+3)
jr nz,{-}
; congratulate player
ld bc,teletypercongrat
call objectafterthis
DIE
_explosequence:
.byte $94,$56,$54,$98,$97,$81,$74,$93
.byte $86,$77,$65,$76,$85,$63,$64,$82
.byte $96,$78,$55,$73,$88,$84,$95,$72
.byte $66,$75,$92,$67,$83,$87