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4b6fc0eed2
festro/festro.s
Dagen Brock f42d57054b some tweaks, should match youtube version
2012-12-21 16:16:11 -06:00

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**************************************************
* FESTRO
* @author Dagen Brock <dagenbrock@gmail.com>
* @date 2012-11-11
*
* Style Guide:
* ALLCAPS Apple II ROM "Constants"
* CamelCase function names
* ]loops loops (duh)
* GSomething Global application constants
* _myVar local variables
**************************************************
org $2000
typ #$ff
xc off ; 65c02
xc
lst off
**************************************************
* Global Addresses / Pointers
**************************************************
srcPtr equz $00
dstPtr equz $02
** alternate mapping for fire averaging routine
srcPtrL equz $02
srcPtrR equz $04
srcPtrD equz $06
**************************************************
* Demo Machine initialization
**************************************************
jsr DetectIIgs
jsr InitState ;@todo: IIc vblank code
**************************************************
* Main Demo Controller
**************************************************
DemoMain
:mainLoop jsr KeyHandler
lda GDemoState
asl
tax
jmp (DemoSubroutineTable,x)
bra :mainLoop
DemoSubroutineTable
dw HandleProdrop
dw HandleScan01
dw HandleTextClear
dw HandleShortWait
dw HandleStarScroll
dw HandleScan02
dw HandleTextClear
dw HandleMapScroll
dw HandleScan03
dw HandleLoResInit
dw SetFireRatio20
dw HandleFireState1
dw SetFireRatio90
dw HandleFireState1
dw HandleFireStateK
dw HandleFireState1
dw HandleFireStateF
dw HandleFireState1
dw HandleFireStateE
dw HandleFireState1
dw HandleFireStateS
dw HandleFireState1
dw HandleFireStateT
dw HandleFireState1
dw HandleFireState1
dw HandleFireStateYear
dw HandleFireState1
dw SetFireRatio20
dw HandleFireState1
dw HandleFireState1
dw SetFireRatio01
dw HandleFireState1
dw HandleKfestLogo
dw HandleShortWait
dw HandleSplitSlide
dw HandleAppleDraw
dw SetProdropGr
dw HandleProdrop
dw SetProdropText
dw HandleShortWait
dw HandleTextClear
dw HandleSwipeWrite
dw HandleShortWait
dw HandleGreetScroll
dw HandleShortWait
dw HandleProdrop
dw HandleTextClear
dw HandleFinalScreen
dw P8Quit
**************************************************
* Demo-Part Controllers
**************************************************
HandleGreetScroll
lda #_cwoz
sta srcPtr
lda #>_cwoz
sta srcPtr+1
ldx #23
ldy #21
lda #$30
jsr DrawStringXYWait ; draw woz slowly
lda #$30
jsr SimplerWait ; extra delay
:loop jsr VBlank
jsr ScrollRightUp ; scroll right side of screen
inc _creditScrollCounter
lda #26
jsr SimplerWait
lda _creditScrollTick
cmp #_creditSkipLines ; see if we've flipped line counter
beq :next
inc _creditScrollTick
lda #$13 ; we skip a line
jsr SimplerWait ; with a shorter wait tho
bra :loop
:next stz _creditScrollTick ; reset
lda _creditStringIdx
asl
tax
lda _creditStringsTable+1,x ; we know if the high byte is 0,
beq :noStrings ; then we hit the terminator
sta srcPtr+1
lda _creditStringsTable,x
sta srcPtr
inc _creditStringIdx ;++
ldx #23
ldy #23
lda #$10
jsr DrawStringXYWait
bra :skipWait
:noStrings
lda #$08
jsr SimplerWait
:skipWait lda _creditScrollCounter
cmp #80
beq :rocket
bra :loop
:rocket stz _creditScrollCounter
stz _creditStringIdx
:rocketLoop inc _creditScrollCounter
jsr VBlank
jsr ScrollRightUp
lda _creditStringIdx
asl
tax
lda _rocketStringsTable+1,x ; we know if the high byte is 0,
beq :noStrings2 ; then we hit the terminator
sta srcPtr+1 ; otherwise set screen pointer
lda _rocketStringsTable,x
sta srcPtr
inc _creditStringIdx ; line++
ldx #23
ldy #23
jsr DrawStringXY : write line
:noStrings2 lda #20
jsr SimplerWait
lda _creditScrollCounter
cmp #40
beq :done
bra :rocketLoop
:done jmp DemoNext
_creditScrollTick db #$00
_creditScrollCounter db #$00
_creditStringIdx db #$00
_creditSkipLines equ #$01
HandleMapScroll
ldx #WorldMapWidth-40
jsr DrawMapOffset
lda #$25
jsr SimplerWait
ldx #WorldMapWidth-40
:scrollLoop phx
jsr VBlankSafe
jsr DrawMapOffset
lda #$20
jsr SimplerWait
plx
dex
bne :scrollLoop
ldx #9
:blinkenLoop phx
lda #10
ldx #$10
jsr SENoteAX
jsr VBlank
lda #" "
sta Lo07+16
lda #20
jsr SimplerWait
jsr VBlank
lda #"*"
sta Lo07+16
plx
dex
bne :blinkenLoop
lda #$03
:flashenLoop pha
lda #_scanStr09b ;Scanning BLANK
sta srcPtr
lda #>_scanStr09b
sta srcPtr+1
ldx #15
ldy #08
lda #$10
jsr DrawStringXYWait
lda #$10
jsr SimplerWait
lda #_scanStr09 ;Scanning
sta srcPtr
lda #>_scanStr09
sta srcPtr+1
ldx #15
ldy #08
lda #$18
jsr DrawStringXYWait
lda #$20
jsr SimplerWait
pla
dec
bne :flashenLoop
lda #$30
jsr SimplerWait
jmp DemoNext
_starSpeed db #$10
HandleStarScroll
_defaultStarSpeed equ #$10
lda #$1e
:speedUp ldx #5
pha
ldy #0 ; nosong
jsr StarScrollAuto
pla
dec
cmp #_defaultStarSpeed
bne :speedUp
* full speed
ldx #50
lda #_defaultStarSpeed
ldy #0 ; nosong
jsr StarScrollAuto
* --- diga
ldx #$0
:loop phx
lda #_defaultStarSpeed ; waitfirst
jsr SimplerWait
jsr VBlank
jsr ScrollLeft
jsr GenStarRight
plx
lda _digawriteString,x
beq :digawriteDone ; done (zero terminated string)
sta Lo12+39
inx
bra :loop
* slow down?
:digawriteDone
lda #_defaultStarSpeed
:slowDown ldx #1
pha
ldy #0 ; nosong
jsr StarScrollAuto
pla
inc
inc
inc
inc
cmp #8*4+#_defaultStarSpeed
bne :slowDown
lda #$30
jsr SimplerWait
* speed up again
lda #_defaultStarSpeed+5
:speedUpAgain ldx #2
pha
jsr StarScrollAuto
pla
dec
cmp #_defaultStarSpeed
bne :speedUpAgain ;)
ldx #200
lda #_defaultStarSpeed
ldy #1 ;SONG
jsr StarScrollAuto
* second loop inserts planet
ldx #EarthTextWidth
:loop2 phx
jsr VBlank
jsr ScrollLeft
jsr GenStarRight
lda _earthOffset
jsr DrawEarthLine
inc _earthOffset
lda #_defaultStarSpeed
pha
phx
phy
ldx #_defaultStarSpeed
jsr PlaySong01Note
ply
plx
pla
plx
dex
bne :loop2
* third loop scrolls onto screen more
lda #_defaultStarSpeed
:slowDownAgain ldx #1
pha
pha
jsr VBlank
jsr ScrollLeft
jsr GenStarRight
pla ; play slower notes
asl
tax
jsr PlaySong01Note
pla
inc
inc
cmp #$2c ; adjusting this shifts where song ends
bne :slowDownAgain ; i take my varibls srs
lda #$25
jsr SimplerWait
jmp DemoNext
_earthOffset db #$00
* A = wait , X = reps, y=snd
StarScrollAuto
sty _starScrollSound
sta _starScrollAutoWait
:loop phx
jsr ScrollLeft
jsr GenStarRight
ldy _starScrollSound
beq :noSong
lda KEY ; dynamically set wait speed for debugging best values
cmp #$80
bge :key
jmp :noKey
:key sta STROBE
cmp #"."
bne :notDot
inc _starSpeed
bra :noKey
:notDot cmp #","
bne :noKey
dec _starSpeed
:noKey
ldx _starSpeed
jsr PlaySong01Note
bra :skipWait
:noSong
lda _starScrollAutoWait
jsr SimplerWait
:skipWait plx
dex
bne :loop
rts
_starScrollAutoWait db 0
_starScrollSound db 0
HandleLoResInit
jsr VBlank
sta LORES
jsr ClearLoRes
jmp DemoNext
HandleTextClear
jsr VBlank
jsr ClearText
sta TXTSET
jmp DemoNext
HandleFireState1
ldx #20
:loop jsr FirePass
dex
bne :loop
jmp DemoNext
HandleFireStateK
lda #$20
:loop ldx #_sprData_K
ldy #>_sprData_K
jsr FirePassSprite ; preserves A,X,Y
dec
bne :loop
jmp DemoNext
HandleFireStateF
lda #$20
:loop ldx #_sprData_F
ldy #>_sprData_F
jsr FirePassSprite ; preserves A,X,Y
dec
bne :loop
jmp DemoNext
HandleFireStateE
lda #$20
:loop ldx #_sprData_E
ldy #>_sprData_E
jsr FirePassSprite ; preserves A,X,Y
dec
bne :loop
jmp DemoNext
HandleFireStateS
lda #$20
:loop ldx #_sprData_S
ldy #>_sprData_S
jsr FirePassSprite ; preserves A,X,Y
dec
bne :loop
jmp DemoNext
HandleFireStateT
lda #$20
:loop ldx #_sprData_T
ldy #>_sprData_T
jsr FirePassSprite ; preserves A,X,Y
dec
bne :loop
jmp DemoNext
FirePass pha
phx
jsr MakeHeat
jsr Scroll8
jsr Average8
jsr VBlank
jsr DrawBufFullScreen
jsr RandPop
plx
pla
rts
HandleFireStateYear
lda #$20
:loop ldx #_sprData_YEAR
ldy #>_sprData_YEAR
jsr FirePassSpriteBig ; preserves A,X,Y
dec
bne :loop
jmp DemoNext
RandPop jsr GetRandHot
bne :noPop
sta SPEAKER
:noPop rts
* A = count X=lowbyte Y=hibyte
FirePassSprite
pha
phx
phy
ldy #4
jsr SErandStaticBit
jsr MakeHeat
jsr Scroll8
jsr RandPop
ply
plx
jsr DrawSpriteMask
jsr Average8
jsr VBlank
jsr DrawBufFullScreen
pla
rts
* A = count X=lowbyte Y=hibyte
FirePassSpriteBig
pha
phx
phy
ldy #8 ; different static for big sprit
jsr SErandStaticBit2
jsr MakeHeat
jsr Scroll8
jsr RandPop
ply
plx
jsr DrawSpriteMaskBig
jsr Average8
jsr DrawBufFullScreen
pla
rts
FBufWidth equ #40
FBufHeight equ #24
ds \
FBUF ds #FBufWidth*#FBufHeight+#FBufWidth ;extra line gets coals
FBufLen equ #FBufWidth*#FBufHeight
FBufLastLine equ #FBufWidth*#FBufHeight-#FBufWidth+FBUF
HandleKfestLogo
ldx #0
:loop lda KfestLogo,x
sta Lo01,x
lda KfestLogoWidth*1+KfestLogo,x
sta Lo02,x
lda KfestLogoWidth*2+KfestLogo,x
sta Lo03,x
lda KfestLogoWidth*3+KfestLogo,x
sta Lo04,x
lda KfestLogoWidth*4+KfestLogo,x
sta Lo05,x
lda KfestLogoWidth*5+KfestLogo,x
sta Lo06,x
lda KfestLogoWidth*6+KfestLogo,x
sta Lo07,x
lda KfestLogoWidth*7+KfestLogo,x
sta Lo08,x
lda KfestLogoWidth*8+KfestLogo,x
sta Lo09,x
lda KfestLogoWidth*9+KfestLogo,x
sta Lo10,x
lda KfestLogoWidth*10+KfestLogo,x
sta Lo11,x
lda KfestLogoWidth*11+KfestLogo,x
sta Lo12,x
lda KfestLogoWidth*12+KfestLogo,x
sta Lo13,x
lda KfestLogoWidth*13+KfestLogo,x
sta Lo14,x
lda KfestLogoWidth*14+KfestLogo,x
sta Lo15,x
lda KfestLogoWidth*15+KfestLogo,x
sta Lo16,x
lda KfestLogoWidth*16+KfestLogo,x
sta Lo17,x
lda KfestLogoWidth*17+KfestLogo,x
sta Lo18,x
lda KfestLogoWidth*18+KfestLogo,x
sta Lo19,x
lda KfestLogoWidth*19+KfestLogo,x
sta Lo20,x
lda KfestLogoWidth*20+KfestLogo,x
sta Lo21,x
lda KfestLogoWidth*21+KfestLogo,x
sta Lo22,x
lda KfestLogoWidth*22+KfestLogo,x
sta Lo23,x
lda KfestLogoWidth*23+KfestLogo,x
sta Lo24,x
inx
cpx #KfestLogoWidth
beq :done
jmp :loop
:done jsr PlaySong02
jmp DemoNext
HandleSplitSlide
ldy #$12
:passStart ldx #0
:loop lda Lo02,x
sta Lo01,x
lda Lo03,x
sta Lo02,x
lda Lo04,x
sta Lo03,x
lda Lo05,x
sta Lo04,x
lda Lo06,x
sta Lo05,x
lda Lo07,x
sta Lo06,x
lda Lo08,x
sta Lo07,x
lda Lo09,x
sta Lo08,x
lda Lo10,x
sta Lo09,x
lda Lo11,x
sta Lo10,x
lda Lo12,x
sta Lo11,x
lda Lo13,x
sta Lo12,x
lda Lo23,x
sta Lo24,x
lda Lo22,x
sta Lo23,x
lda Lo21,x
sta Lo22,x
lda Lo20,x
sta Lo21,x
lda Lo19,x
sta Lo20,x
lda Lo18,x
sta Lo19,x
lda Lo17,x
sta Lo18,x
lda Lo16,x
sta Lo17,x
lda Lo15,x
sta Lo16,x
lda Lo14,x
sta Lo15,x
lda Lo13,x
sta Lo14,x
stz Lo13,x
inx
cpx #40
beq :passComplete
jmp :loop
:passComplete dey
beq :done
phy
lda #$16
jsr SimplerWait
ply
jmp :passStart
:done jmp DemoNext
DFace
jsr VBlank
sta LORES
jsr ClearLoRes
jsr VBlank
ldx #0
ldy #1 ; offset by 1
:loop lda DLogo,x
sta Lo01,y
lda DLogoWidth*1+DLogo,x
sta Lo02,y
lda DLogoWidth*2+DLogo,x
sta Lo03,y
lda DLogoWidth*3+DLogo,x
sta Lo04,y
lda DLogoWidth*4+DLogo,x
sta Lo05,y
lda DLogoWidth*5+DLogo,x
sta Lo06,y
lda DLogoWidth*6+DLogo,x
sta Lo07,y
lda DLogoWidth*7+DLogo,x
sta Lo08,y
lda DLogoWidth*8+DLogo,x
sta Lo09,y
lda DLogoWidth*9+DLogo,x
sta Lo10,y
lda DLogoWidth*10+DLogo,x
sta Lo11,y
lda DLogoWidth*11+DLogo,x
sta Lo12,y
lda DLogoWidth*12+DLogo,x
sta Lo13,y
lda DLogoWidth*13+DLogo,x
sta Lo14,y
lda DLogoWidth*14+DLogo,x
sta Lo15,y
lda DLogoWidth*15+DLogo,x
sta Lo16,y
lda DLogoWidth*16+DLogo,x
sta Lo17,y
lda DLogoWidth*17+DLogo,x
sta Lo18,y
lda DLogoWidth*18+DLogo,x
sta Lo19,y
lda DLogoWidth*19+DLogo,x
sta Lo20,y
lda DLogoWidth*20+DLogo,x
sta Lo21,y
lda DLogoWidth*21+DLogo,x
sta Lo22,y
lda DLogoWidth*22+DLogo,x
sta Lo23,y
iny
inx
cpx #DLogoWidth+1
beq :done
jmp :loop
:done
:noKey inc Lo01
inc Lo02
inc Lo03
inc Lo04
inc Lo05
inc Lo06
inc Lo07
inc Lo08
inc Lo09
inc Lo10
inc Lo11
inc Lo12
inc Lo13
inc Lo14
inc Lo15
inc Lo16
inc Lo17
inc Lo18
inc Lo19
inc Lo20
inc Lo21
inc Lo22
inc Lo23
inc Lo24
inc Lo01+39
inc Lo02+39
inc Lo03+39
inc Lo04+39
inc Lo05+39
inc Lo06+39
inc Lo07+39
inc Lo08+39
inc Lo09+39
inc Lo10+39
inc Lo11+39
inc Lo12+39
inc Lo13+39
inc Lo14+39
inc Lo15+39
inc Lo16+39
inc Lo17+39
inc Lo18+39
inc Lo19+39
inc Lo20+39
inc Lo21+39
inc Lo22+39
inc Lo23+39
inc Lo24+39
lda KEY
cmp #$80
bge :key
jmp :noKey
:key sta STROBE
sta TXTSET
jsr ClearText
jmp DemoMain
* set zero page ptr 00 to source of null terminated string
* x = x
* y = y
DrawStringXY
pha
phx
phy
tya
asl ; get pointer to line
tay
lda LoLineTable,y
sta dstPtr
lda LoLineTable+1,y
sta dstPtr+1
txa
clc
adc dstPtr
sta dstPtr
bcc :noCarry
inc dstPtr+1
:noCarry ldy #0
:loop lda (srcPtr),y
beq :done
sta (dstPtr),y
iny
bra :loop
:done ply
plx
pla
rts
* set zero page ptr 00 to source of null terminated string
* A = wait
* x = x
* y = y
DrawStringXYWait
pha
phx
phy
sta _drawWait
tya
asl ; get pointer to line
tay
lda LoLineTable,y
sta dstPtr
lda LoLineTable+1,y
sta dstPtr+1
txa
clc
adc dstPtr
sta dstPtr
bcc :noCarry
inc dstPtr+1
:noCarry ldy #0
:loop lda (srcPtr),y
beq :done
sta (dstPtr),y
iny
pha
phx
phy
lda #NoteD1
ldx #5
jsr SENoteAX
ply
plx
pla
lda _drawWait
jsr SimplerWait
jsr VBlank
bra :loop
:done ply
plx
pla
rts
_drawWait db 0
HandleScan01
lda #40
jsr SimplerWait
* first draw box
jsr DrawBoxAnim
lda #$30
jsr SimplerWait
lda #_scanStr01 ;STATUS
sta srcPtr
lda #>_scanStr01
sta srcPtr+1
ldx #_boxX+2
ldy #_boxY+2
jsr DrawStringXY
lda #$30
jsr SimplerWait
lda #$03
:flashenLoop pha
lda #_scanStr08 ;Scanning
sta srcPtr
lda #>_scanStr08
sta srcPtr+1
ldx #_boxX+10
ldy #_boxY+2
lda #$10
jsr DrawStringXYWait
lda #$20
jsr SimplerWait
lda #_scanStr08b ;Scanning BLANK
sta srcPtr
lda #>_scanStr08b
sta srcPtr+1
ldx #_boxX+10
ldy #_boxY+2
lda #$10
jsr DrawStringXYWait
lda #$15
jsr SimplerWait
pla
dec
bne :flashenLoop
jmp DemoNext
HandleScan02
lda #40
jsr SimplerWait
* first draw box
jsr DrawBoxAnim
lda #$30
jsr SimplerWait
lda #_scanStr01 ;STATUS
sta srcPtr
lda #>_scanStr01
sta srcPtr+1
ldx #_boxX+2
ldy #_boxY+2
jsr DrawStringXY
lda #$30
jsr SimplerWait
lda #_scanStr02 ;Located
sta srcPtr
lda #>_scanStr02
sta srcPtr+1
ldx #_boxX+10
ldy #_boxY+2
lda #$10
jsr DrawStringXYWait
lda #_scanStr03 ; virgo
sta srcPtr
lda #>_scanStr03
sta srcPtr+1
ldx #_boxX+5
ldy #_boxY+3
lda #$10
jsr DrawStringXYWait
lda #$30
jsr SimplerWait
lda #_scanStr04 ; Local
sta srcPtr
lda #>_scanStr04
sta srcPtr+1
ldx #_boxX+5
ldy #_boxY+4
lda #$10
jsr DrawStringXYWait
lda #$30
jsr SimplerWait
lda #_scanStr05 ; Milky
sta srcPtr
lda #>_scanStr05
sta srcPtr+1
ldx #_boxX+5
ldy #_boxY+5
lda #$10
jsr DrawStringXYWait
lda #$30
jsr SimplerWait
lda #_scanStr06 ; Earth
sta srcPtr
lda #>_scanStr06
sta srcPtr+1
ldx #_boxX+5
ldy #_boxY+6
lda #$10
jsr DrawStringXYWait
lda #$30
jsr SimplerWait
jmp DemoNext
HandleScan03
lda #40
jsr SimplerWait
* first draw box
jsr DrawBoxAnim
lda #$30
jsr SimplerWait
lda #_scanStr01 ;STATUS
sta srcPtr
lda #>_scanStr01
sta srcPtr+1
ldx #_boxX+2
ldy #_boxY+2
jsr DrawStringXY
lda #$30
jsr SimplerWait
lda #_scanStr19 ;awesome
sta srcPtr
lda #>_scanStr19
sta srcPtr+1
ldx #_boxX+2
ldy #_boxY+4
lda #$10
jsr DrawStringXYWait
lda #$15
jsr SimplerWait
lda #$03
:flashenLoop pha
lda #_scanStr20 ;Thermal
sta srcPtr
lda #>_scanStr20
sta srcPtr+1
ldx #_boxX+2
ldy #_boxY+6
lda #$08
jsr DrawStringXYWait
lda #$20
jsr SimplerWait
lda #_scanStr20b ;Thermal BLANK
sta srcPtr
lda #>_scanStr20b
sta srcPtr+1
ldx #_boxX+2
ldy #_boxY+6
lda #$08
jsr DrawStringXYWait
lda #$10
jsr SimplerWait
pla
dec
bne :flashenLoop
jmp DemoNext
DrawBoxAnim
_boxX equ #13
_boxY equ #14
stz _gapCounter ;gap counter
:boxExpandLoop
lda #_boxStrTop
sta srcPtr
lda #>_boxStrTop
sta srcPtr+1
ldy #_boxY ;y position
ldx #_boxX ;x position
jsr DrawStringXY ; 0zp, x, y
lda _gapCounter
beq :noLines
lda #_boxStrMid
sta srcPtr
lda #>_boxStrMid
sta srcPtr+1
lda _gapCounter
:middleLoop iny
jsr DrawStringXY
dec
bne :middleLoop
:noLines iny
lda #_boxStrBot
sta srcPtr
lda #>_boxStrBot
sta srcPtr+1
jsr DrawStringXY
inc _gapCounter
lda _gapCounter
cmp #$08
beq :doneBox
lda #$10
jsr SimplerWait
lda _boxNote ; sound code
ldx #10
jsr SENoteAX
lda #$10
sec
sbc _boxNote
sta _boxNote
jsr VBlank
bra :boxExpandLoop
:doneBox stz _boxNote ;reset
rts
_boxNote db 0
_gapCounter db 0
HandleShortWait
lda #$30
tax
tay
jsr SimpleWait
jmp DemoNext
HandleMedWait
lda #$50
tax
tay
jsr SimpleWait
jmp DemoNext
** Dropper routine - not specific to ProDrop per se
** - uses DSEG0
HandleProdrop
jsr soundDownReset
lda #0 ; start scan at line 0 every time
sta _prodropScanLine
lda #DSEG0 ; initialize destination pointer
sta dstPtr
lda #>DSEG0
sta dstPtr+1
:scanLineLoop
lda _prodropScanLine
asl ; (line * 2) for table index
tax
lda LoLineTable,x
sta srcPtr
lda LoLineTable+1,x
sta srcPtr+1
ldy #0
:scanCharLoop
lda (srcPtr),y
cmp #" " ; SPACE
]dropCharCompare equ *-1 ; we change this for GRaphics mode
beq :nextChar
phy ; +1
phy ; +2
ldy #0
sta (dstPtr),y
iny
pla ; +1
sta (dstPtr),y
lda _prodropScanLine
ora #%10000000 ; set high bit to indicate non-animated state
iny
sta (dstPtr),y
iny
jsr GetRand
and #%01111111 ; decided to limit it to make the values a little
; closer together. #$00 - #$7f
; this particularly helps with gaps when nothing is
; falling because you started with few characters
sta (dstPtr),y
ply ; 0
lda dstPtr ; now add 4
clc
adc #$04
sta dstPtr
bcc :nextChar
inc dstPtr+1 ; increment page (high byte)
:nextChar
iny
cpy #40
bne :scanCharLoop
inc _prodropScanLine
lda _prodropScanLine
cmp #24
bne :scanLineLoop
; we're done scanning
lda #$FF
sta (dstPtr) ; set terminator byte
* This is the animation loop
:prodropUpdate
stz _prodropAnimDone ; finished = false
:prodropUpdateLoop
lda _prodropSound
beq :noSound
lda #2 ; repeat interval... /
jsr soundDown
stz _prodropSound
bra :skipDelay
:noSound stz _prodropSound ; if this flag gets set we call our sound routine
lda #6
tax
tay
jsr SimpleWait
:skipDelay jsr VBlank
lda _prodropAnimDone
beq :notDone
jmp ]prodropAnimDone
:notDone lda #1 ; set finished = true before we start our char
sta _prodropAnimDone ; loop, any time we find active char set false
lda #DSEG0 ; initialize source pointer (our character buffer)
sta srcPtr
lda #>DSEG0
sta srcPtr+1
:prodropAnimLoop
]isChar
lda (srcPtr)
beq ]nextAnimChar
cmp #$FF ; array termination byte
beq :prodropUpdateLoop ; reset src pointer and do it all over
stz _prodropAnimDone ; hate to continually set this false, but we have time
ldy #2
lda (srcPtr),y ; now it's in our y value
cmp #$80 ; check for high bit
blt :dropIt ; not set? then we're animating it
iny ; check random wait state (y=3)
lda (srcPtr),y
beq ]setCharAnim ; is 0 so set it to animate on next pass
dec ; otherwise decrement wait state
sta (srcPtr),y
bra ]nextAnimChar
:dropIt
; ldy #2
; lda (srcPtr),y ; get Y value
asl
tax
lda LoLineTable,x ; convert to ZP pointer
sta dstPtr
lda LoLineTable+1,x
sta dstPtr+1
ldy #1
lda (srcPtr),y ; get our X value
tay
lda #" "
]dropCharWrite equ *-1 ; we set this differently for GRaphics mode
sta (dstPtr),y
* breath... holy crap all that just to draw a space at X,Y
* now we draw the character one line down
ldy #2
lda (srcPtr),y ; get Y value
inc ; move it down
cmp #24
beq ]charFinished
sta (srcPtr),y
asl
tax
lda LoLineTable,x ; convert to ZP pointer
sta dstPtr
lda LoLineTable+1,x
sta dstPtr+1
ldy #1 ; get X value
lda (srcPtr),y
tay
lda (srcPtr) ; get real character
sta (dstPtr),y ; draw that f***er!
bra ]nextAnimChar
]charFinished
lda #0
sta (srcPtr)
bra ]nextAnimChar
]setCharAnim
ldy #2
lda (srcPtr),y
and #%01111111 ; clear high bit
sta (srcPtr),y
lda #1 ; SET SOUND ANY TIME NEW CHAR DROPS
sta _prodropSound
]nextAnimChar
lda srcPtr
clc
adc #4 ; struct size
sta srcPtr
bcc :prodropAnimLoop
inc srcPtr+1 ; next page
bra :prodropAnimLoop
]prodropAnimDone
jmp DemoNext
_tmpVar dw 0
* done = true
* foreach DSEG0-blahblah
* if 00
* skip
* else
* done = false
*
* if highbit
* if random 0
* then strip high bit and continue (beep?)
* else dec random
* else
* store space at x,y
* inc y
* if y = 25
* stz over char
* else
* store char at x,y
_prodropAnimDone db 1 ; any time we find a character it flips this false
_prodropScanLine db 0 ; starts scanning at line 0
_prodropState db 0 ; starts with 0, which is scan mode
_prodropSound db 0 ; determine if we should call sound engine
_soundDownTopFreq db 20
soundDownReset lda #_soundDownTopFreq
sta _sndFreq
rts
_sndFreq db #_soundDownTopFreq
_sndInt db 0
soundDown pha ;interval
ldx #25
lda _sndFreq
jsr SEToneAX
pla
cmp _sndInt
beq :intMatch
inc _sndInt
rts
:intMatch stz _sndInt
inc _sndFreq
rts
HandleSwipeWrite
]initSwipe
ldx #23 ; reset line indexes
:clearLoop stz _swipeLinesX,x ;
dex
bne :clearLoop
stz _swipeActive ; reset overall index
* @todo make parameters ******************************
lda #FireTextHeight
sta _swipeMaxHeight ; set max height
lda #FireTextWidth
sta _swipeMaxWidth ; set max width
lda #0
sta _swipeXOffset ; set x position
lda #2
sta _swipeYOffset ; set y position
** DA LOOP!!! does one full pass of all lines.. this is the OUTERMOST LOOP
:swipeLoop
lda #1
sta _swipeLinesDone ; set true... flips false every time we find a char
lda _swipeMaxHeight ; increment active set - once per loop, up to max height
cmp _swipeActive
beq :swipeMaxHit
inc _swipeActive
:swipeMaxHit
stz _swipeCurrLine ; start with line 0
:swipeLineLoop
lda _swipeCurrLine
ldx _swipeMaxWidth
jsr Multiply8x8 ; multiply bufferwidth * linenumber
sta srcPtr
stx srcPtr+1 ; store our multiplication offset
clc
adc #FireText ; and add the buffer location
sta srcPtr
lda srcPtr+1
adc #>FireText
sta srcPtr+1 ; srcPtr points to first character of that line in buffer
lda _swipeCurrLine
clc
adc _swipeYOffset ; linenumber + y-offset
asl ; x2 for pointer
tax
lda LoLineTable,x ; now convert to ZP pointer
clc
adc _swipeXOffset ; but also add our screen x-offset
sta dstPtr
bcc :noAdd
lda LoLineTable+1,x ; rolled our low-byte so add 1 to high-byte
inc
bra :skip
:noAdd lda LoLineTable+1,x
:skip sta dstPtr+1 ; destptr points to first character of where this line is positioned on screen
ldx _swipeCurrLine
lda _swipeLinesX,x
tay ; get current character index
lda (srcPtr),y ; get char from buffer
beq :lineIsDone ; was it #$00?
sta (dstPtr),y ; store char to screen
inc _swipeLinesX,x ; next char
stz _swipeLinesDone ; found a char so we always set this false
:lineIsDone
inc _swipeCurrLine
lda _swipeCurrLine
cmp _swipeActive
bne :swipeLineLoop
lda #20
tax
tay
jsr SimpleWait
lda _swipeLinesDone
beq :swipeLoop
jmp DemoNext
* for (line =0 ; line < active ; line ++ ) {
* sourceptr = bufferwidth * line
* destPtr = ^lores[line+yoffset] + xoffset
* ldy arrayX[line]
* lda (sourceptr),y
* if (a != 0)
* sta (destptr),y
* inc arrayX[line]
* else
* linesdone ++
* }
* if (linesdone == maxlines) return
* else swipepassloop
_swipeLinesDone db 0 ; how many lines are fully complete
_swipeCurrLine db 0 ; drawing loop line index
_swipeActive db 0 ; number of lines to be updating
_swipeLinesX ds 24 ; array with x position of each line
_swipeMaxHeight db #$0 ; set # lines in the source buffer
_swipeMaxWidth db #0 ; set # characters per line in the source buffer
_swipeXOffset db #$0 ; screen offset for placement
_swipeYOffset db #$0 ; screen offset for placement
* done = true
* while !done
* for x = 0 to width
* for y = 0 to height
* load buffer x,y
* cmp screen x,y (plus offsets)
* if (screen = buffer) continue
* done = false
* get rand
* store at screen x,y
* waitvbl
HandleAppleDraw
:mainLoop
lda #1
sta _appleDone
lda #AppleLogo
sta srcPtr
lda #>AppleLogo
sta srcPtr+1
lda #_appleOffsetY
sta _currentY
:lineStart asl
tax
lda LoLineTable,x
sta dstPtr
lda LoLineTable+1,x
sta dstPtr+1
lda dstPtr ; add offset
clc
adc #_appleOffsetX
sta dstPtr
bcc :noCarry2
inc dstPtr+1
:noCarry2
; src = buffer
; dst = screen
ldy #$00
:drawLoop lda (srcPtr),y
* bra :noMagic
cmp (dstPtr),y
beq :nextChar
stz _appleDone
jsr GetRand
cmp #$10 ; occasional black pixel @todo
bge :noBlack
lda #0
bra :noMagic
:noBlack cmp #$F2 ; had to add in a way to keep it from
blt :noMagic ; getting stuck so now it occasionally puts
lda (srcPtr),y ; the right pixel even when it wasn't
:noMagic sta (dstPtr),y ; found by getrand. (because it's only pseudorandom)
:nextChar iny
cpy #AppleLogoWidth
bne :drawLoop
:nextLine lda srcPtr
clc
adc #AppleLogoWidth
sta srcPtr
bcc :noCarry1
inc srcPtr+1
:noCarry1
inc _currentY ; handle screen offset
lda _currentY
cmp #AppleLogoHeight+_appleOffsetY
bne :lineStart
:donePass lda #$5
jsr SimplerWait
ldy #$4
jsr SErandStaticBit
jsr VBlank
lda _appleDone
beq :mainLoop
lda #$33
jsr SimplerWait
jmp DemoNext
_currentY db #$00
_appleDone db #$00
_appleOffsetX equ 10
_appleOffsetY equ 6
**************************************************
* Draws final info text and waits / secret menu
**************************************************
HandleFinalScreen
lda #FinalText
sta srcPtr
lda #>FinalText
sta srcPtr+1
lda #0
:lineLoop pha
asl
tax
lda LoLineTable,x
sta dstPtr
lda LoLineTable+1,x
sta dstPtr+1
ldy #0
:copyLoop lda (srcPtr),y
beq :nextLine
cmp #$ff
beq :done
sta (dstPtr),y
iny
lda #2
jsr SimplerWait
bra :copyLoop
:nextLine iny
tya
clc
adc srcPtr
sta srcPtr
bcc :noCarry
inc srcPtr+1
:noCarry pla
inc
bra :lineLoop
:done pla ;woops
* FALLTHROUGH to final menu
stz DSEG0 ; borrow a byte for cursor blink
:noKey
lda #$6
jsr SimplerWait
jsr VBlank
lda DSEG0
beq :blink
dec DSEG0
lda #"?"
bra :plot
:blink lda #" "
inc DSEG0
:plot ldx #23
ldy #20
jsr PlotXY
:chkKey lda KEY
cmp #$80
blt :noKey
sta STROBE
cmp #"f"
beq :goFire
cmp #"F"
beq :goFire
cmp #"d"
beq :goD
cmp #"D"
beq :goD
jmp DemoNext ; any other key advances (quits)
:goFire bra HiddenFire
:goD
jmp DFace
HiddenFire lda #$90
sta GFireRatio
sta LORES
jsr ClearLoRes
:noKey jsr FirePass
lda KEY
cmp #$80
blt :noKey
sta STROBE
sta TXTSET
jsr ClearText
jmp DemoMain
**************************************************
* SUBROUTINES
**************************************************
SetFireRatio01
lda #$01
sta GFireRatio
jmp DemoNext
SetFireRatio20
lda #$20
sta GFireRatio
jmp DemoNext
SetFireRatio90
lda #$90
sta GFireRatio
jmp DemoNext
DemoNext inc GDemoState
jmp DemoMain
**************************************************
* Draw map at offset in X
**************************************************
DrawMapOffset ldy #0
:drawLoop lda WorldMap,x
sta Lo01,y
lda WorldMapWidth*1+WorldMap,x
sta Lo02,y
lda WorldMapWidth*2+WorldMap,x
sta Lo03,y
lda WorldMapWidth*3+WorldMap,x
sta Lo04,y
lda WorldMapWidth*4+WorldMap,x
sta Lo05,y
lda WorldMapWidth*5+WorldMap,x
sta Lo06,y
lda WorldMapWidth*6+WorldMap,x
sta Lo07,y
lda WorldMapWidth*7+WorldMap,x
sta Lo08,y
lda WorldMapWidth*8+WorldMap,x
sta Lo09,y
lda WorldMapWidth*9+WorldMap,x
sta Lo10,y
lda WorldMapWidth*10+WorldMap,x
sta Lo11,y
lda WorldMapWidth*11+WorldMap,x
sta Lo12,y
lda WorldMapWidth*12+WorldMap,x
sta Lo13,y
lda WorldMapWidth*13+WorldMap,x
sta Lo14,y
lda WorldMapWidth*14+WorldMap,x
sta Lo15,y
lda WorldMapWidth*15+WorldMap,x
sta Lo16,y
lda WorldMapWidth*16+WorldMap,x
sta Lo17,y
lda WorldMapWidth*17+WorldMap,x
sta Lo18,y
lda WorldMapWidth*18+WorldMap,x
sta Lo19,y
lda WorldMapWidth*19+WorldMap,x
sta Lo20,y
lda WorldMapWidth*20+WorldMap,x
sta Lo21,y
lda WorldMapWidth*21+WorldMap,x
sta Lo22,y
lda WorldMapWidth*22+WorldMap,x
sta Lo23,y
lda WorldMapWidth*23+WorldMap,x
sta Lo24,y
inx
iny
cpy #40
beq :done
jmp :drawLoop
:done rts
*********************
* DEMO ONLY!
* x=10,y=10
*********************
_fbufOffsetX equ #11
_fbufOffsetY equ #6
**************
* pass sprite ptr - fixed width,height,x,y
* 18x16
**************
_spriteWidth equ #18
_spriteHeight equ #16
_spriteDrawRow db 0
DrawSpriteMask
stx srcPtr
sty srcPtr+1 ; points to first char of sprite
lda #_spriteHeight
sta _spriteDrawRow
lda #FBufWidth*_fbufOffsetY+FBUF+_fbufOffsetX
sta dstPtr
lda #>FBufWidth*_fbufOffsetY+FBUF+_fbufOffsetX
sta dstPtr+1 ; points to first char of buffer with offsets
:lineLoop ldy #0
:loop1 lda (srcPtr),y
beq :skip1
cmp #1
bne :notRand1
jsr GetRandLow
:notRand1 sta (dstPtr),y
:skip1 iny
cpy #_spriteWidth
bne :loop1
lda srcPtr
clc
adc #_spriteWidth
sta srcPtr
bcc :noFlip1
inc srcPtr+1
:noFlip1 lda dstPtr
clc
adc #FBufWidth
sta dstPtr
bcc :noFlip2
inc dstPtr+1
:noFlip2
dec _spriteDrawRow
lda _spriteDrawRow
bne :lineLoop
rts
_spriteBigWidth equ #39
_spriteBigHeight equ #12
_spriteBigDrawRow db 0
DrawSpriteMaskBig
stx srcPtr
sty srcPtr+1 ; points to first char of sprite
lda #_spriteBigHeight
sta _spriteBigDrawRow
lda #FBufWidth*_fbufOffsetY+FBUF+1
sta dstPtr
lda #>FBufWidth*_fbufOffsetY+FBUF+1
sta dstPtr+1 ; points to first char of buffer with offsets
:lineLoop ldy #0
:loop1 lda (srcPtr),y
beq :skip1
cmp #1
bne :notRand1
jsr GetRandLow
:notRand1 sta (dstPtr),y
:skip1 iny
cpy #_spriteBigWidth
bne :loop1
lda srcPtr
clc
adc #_spriteBigWidth
sta srcPtr
bcc :noFlip1
inc srcPtr+1
:noFlip1 lda dstPtr
clc
adc #FBufWidth
sta dstPtr
bcc :noFlip2
inc dstPtr+1
:noFlip2
dec _spriteBigDrawRow
lda _spriteBigDrawRow
bne :lineLoop
rts
**************************************************
* Called by DemoMain
**************************************************
KeyHandler
lda KEY
cmp #$80
blt ]noKey
sta STROBE
sta GKeyEvent
cmp #"q"
beq P8Quit
cmp #"Q"
beq P8Quit
cmp #K_ESC
beq P8Quit
]noKey rts
P8Quit jsr $bf00
dfb $65
da qparms
rts
qparms dfb 4
dfb 0
da $0000
dfb 0
da $0000
**************************************************
* Awesome PRNG thx to White Flame (aka David Holz)
**************************************************
GetRand
lda _randomByte
beq :doEor
asl
bcc :noEor
:doEor eor #$1d
:noEor sta _randomByte
rts
_randomByte db 0
GetRandLow
lda _randomByte2
beq :doEor
asl
bcc :noEor
:doEor eor #$1d
:noEor sta _randomByte2
cmp #$80
bcs :hot
lda #$0
rts
:hot lda #$04
rts
_randomByte2 db 0
**************************************************
* Fire stoker.. returns 0 or F
**************************************************
GetRandHot
lda _rndHot
beq :doEor
asl
bcc :noEor
:doEor eor #$1d
:noEor sta _rndHot
cmp GFireRatio ; FIRE RATIO
bcs :hot
:not lda #$0f
rts
:hot lda #$00
rts
_rndHot db 0
GFireRatio db #$90
**************************************************
* Very simple routine to lay down a line where
* all values are either 0 (cold) or F (hot)
**************************************************
MakeHeat
lda #0
sta FBufLastLine ;FORCE CORNERS BLACK
sta FBufLastLine+#39
;EXTRA LINE
sta FBufLastLine+#FBufWidth ;FORCE CORNERS BLACK
sta FBufLastLine+#FBufWidth+#39
ldx #FBufWidth-2
:mloop jsr GetRandHot
sta FBufLastLine,x
jsr GetRandHot
sta FBufLastLine+#FBufWidth,x
dex
bne :mloop
rts
**************************************************
* Scrolls Fire buffer up one line
**************************************************
Scroll8
*set source
lda #FBUF+FBufWidth
sta srcPtr
lda #>FBUF+FBufWidth
sta srcPtr+1
*set destination
lda #FBUF
sta dstPtr
lda #>FBUF
sta dstPtr+1
:movfwd ldy #0
ldx #0
cpx #>FBufLen-FBufWidth
beq :frag
:page lda (srcPtr),y
sta (dstPtr),y
iny
bne :page
inc srcPtr+1
inc dstPtr+1
inx
cpx #>FBufLen-FBufWidth
bne :page
:frag cpy #FBufLen-FBufWidth
beq :doneCopy
lda (srcPtr),y
sta (dstPtr),y
iny
bne :frag
:doneCopy rts
**************************************************
* Averaage Fire buffer - this is where the magic happens
**************************************************
Average8
lda #FBUF ; pointer to pixel
sta srcPtr
lda #>FBUF
sta srcPtr+1
lda #FBUF-#1 ; pointer to pixel - 1
sta srcPtrL
lda #>FBUF-#1
sta srcPtrL+1
lda #FBUF+#1 ; pointer to pixel + 1
sta srcPtrR
lda #>FBUF+#1
sta srcPtrR+1
lda #FBUF+#FBufWidth
sta srcPtrD
lda #>FBUF+#FBufWidth
sta srcPtrD+1
ldx #0 ; lines
:avgLine ldy #FBufWidth-1
:lineLoop
clc
lda (srcPtr),y ;0
adc (srcPtrL),y ;-1
adc (srcPtrR),y ;+1
adc (srcPtrD),y ;1+width
beq :skipDec ; all zeros then skip everything
dec ; makes fire dissipate faster
lsr
lsr
:skipDec sta (srcPtr),y ;0
dey
bne :lineLoop
cpx #FBufHeight
beq :doneLines
inx ;next line
;shift pointers up a "line"
lda srcPtrD+1
sta srcPtr+1
sta srcPtrL+1 ;\_ also copy this for math below.. not sure
sta srcPtrR+1 ;/ if it would just be better to add all pointers
; or go back to two pointers with iny/dey
lda srcPtrD
sta srcPtr
;left pixel
cmp #0
bne :noPage ;if A != 0 we aren't crossing pages
brk
dec
sta srcPtrL
dec srcPtrL+1
bra :rightPixel
:noPage dec
sta srcPtrL
:rightPixel lda srcPtr
inc
beq :zeroFlip ;0
sta srcPtrR
bra :bottomPixel
:zeroFlip sta srcPtrR
inc srcPtrR+1
:bottomPixel ;add to bottom line pointer
lda srcPtrD
clc
adc #FBufWidth
sta srcPtrD
lda srcPtrD+1
adc #0
sta srcPtrD+1
bra :avgLine
:doneLines rts
ClearText ldx #40
lda #" "
:loop dex
sta Lo01,x
sta Lo02,x
sta Lo03,x
sta Lo04,x
sta Lo05,x
sta Lo06,x
sta Lo07,x
sta Lo08,x
sta Lo09,x
sta Lo10,x
sta Lo11,x
sta Lo12,x
sta Lo13,x
sta Lo14,x
sta Lo15,x
sta Lo16,x
sta Lo17,x
sta Lo18,x
sta Lo19,x
sta Lo20,x
sta Lo21,x
sta Lo22,x
sta Lo23,x
sta Lo24,x
bne :loop
rts
ClearLoRes ldx #40
:loop dex
stz Lo01,x
stz Lo02,x
stz Lo03,x
stz Lo04,x
stz Lo05,x
stz Lo06,x
stz Lo07,x
stz Lo08,x
stz Lo09,x
stz Lo10,x
stz Lo11,x
stz Lo12,x
stz Lo13,x
stz Lo14,x
stz Lo15,x
stz Lo16,x
stz Lo17,x
stz Lo18,x
stz Lo19,x
stz Lo20,x
stz Lo21,x
stz Lo22,x
stz Lo23,x
stz Lo24,x
bne :loop
rts
**************************************************
* Draw entire buffer to lores screen using color map
**************************************************
DrawBufFullScreen
ldx #$0
:loop0 ldy FBUF,x
lda ColorIdx,y
sta Lo01,x
inx
cpx #FBufWidth
bne :loop0
ldx #$0
:loop1 ldy FBufWidth*1+FBUF,x
lda ColorIdx,y
sta Lo02,x
inx
cpx #FBufWidth
bne :loop1
ldx #$0
:loop2 ldy FBufWidth*2+FBUF,x
lda ColorIdx,y
sta Lo03,x
inx
cpx #FBufWidth
bne :loop2
ldx #$0
:loop3 ldy FBufWidth*3+FBUF,x
lda ColorIdx,y
sta Lo04,x
inx
cpx #FBufWidth
bne :loop3
ldx #$0
:loop4 ldy FBufWidth*4+FBUF,x
lda ColorIdx,y
sta Lo05,x
inx
cpx #FBufWidth
bne :loop4
ldx #$0
:loop5 ldy FBufWidth*5+FBUF,x
lda ColorIdx,y
sta Lo06,x
inx
cpx #FBufWidth
bne :loop5
ldx #$0
:loop6 ldy FBufWidth*6+FBUF,x
lda ColorIdx,y
sta Lo07,x
inx
cpx #FBufWidth
bne :loop6
ldx #$0
:loop7 ldy FBufWidth*7+FBUF,x
lda ColorIdx,y
sta Lo08,x
inx
cpx #FBufWidth
bne :loop7
ldx #$0
:loop8 ldy FBufWidth*8+FBUF,x
lda ColorIdx,y
sta Lo09,x
inx
cpx #FBufWidth
bne :loop8
ldx #$0
:loop9 ldy FBufWidth*9+FBUF,x
lda ColorIdx,y
sta Lo10,x
inx
cpx #FBufWidth
bne :loop9
ldx #$0
:loop10 ldy FBufWidth*#10+FBUF,x
lda ColorIdx,y
sta Lo11,x
inx
cpx #FBufWidth
bne :loop10
ldx #$0
:loop11 ldy FBufWidth*#11+FBUF,x
lda ColorIdx,y
sta Lo12,x
inx
cpx #FBufWidth
bne :loop11
ldx #$0
:loop12 ldy FBufWidth*#12+FBUF,x
lda ColorIdx,y
sta Lo13,x
inx
cpx #FBufWidth
bne :loop12
ldx #$0
:loop13 ldy FBufWidth*#13+FBUF,x
lda ColorIdx,y
sta Lo14,x
inx
cpx #FBufWidth
bne :loop13
ldx #$0
:loop14 ldy FBufWidth*#14+FBUF,x
lda ColorIdx,y
sta Lo15,x
inx
cpx #FBufWidth
bne :loop14
ldx #$0
:loop15 ldy FBufWidth*#15+FBUF,x
lda ColorIdx,y
sta Lo16,x
inx
cpx #FBufWidth
bne :loop15
ldx #$0
:loop16 ldy FBufWidth*#16+FBUF,x
lda ColorIdx,y
sta Lo17,x
inx
cpx #FBufWidth
bne :loop16
ldx #$0
:loop17 ldy FBufWidth*#17+FBUF,x
lda ColorIdx,y
sta Lo18,x
inx
cpx #FBufWidth
bne :loop17
ldx #$0
:loop18 ldy FBufWidth*#18+FBUF,x
lda ColorIdx,y
sta Lo19,x
inx
cpx #FBufWidth
bne :loop18
ldx #$0
:loop19 ldy FBufWidth*#19+FBUF,x
lda ColorIdx,y
sta Lo20,x
inx
cpx #FBufWidth
bne :loop19
ldx #$0
:loop20 ldy FBufWidth*#20+FBUF,x
lda ColorIdx,y
sta Lo21,x
inx
cpx #FBufWidth
bne :loop20
ldx #$0
:loop21 ldy FBufWidth*#21+FBUF,x
lda ColorIdx,y
sta Lo22,x
inx
cpx #FBufWidth
bne :loop21
ldx #$0
:loop22 ldy FBufWidth*#22+FBUF,x
lda ColorIdx,y
sta Lo23,x
inx
cpx #FBufWidth
bne :loop22
ldx #$0
:loop23 ldy FBufWidth*#23+FBUF,x
lda ColorIdx,y
sta Lo24,x
inx
cpx #FBufWidth
bne :loop23
rts
**************************************************
* Draws a line of earth sprite on the right
**************************************************
_drawEarthLineXOffset equ #39
DrawEarthLine tax
lda EarthTextWidth*0+EarthText,x
sta Lo07+_drawEarthLineXOffset
lda EarthTextWidth*1+EarthText,x
sta Lo08+_drawEarthLineXOffset
lda EarthTextWidth*2+EarthText,x
sta Lo09+_drawEarthLineXOffset
lda EarthTextWidth*3+EarthText,x
sta Lo10+_drawEarthLineXOffset
lda EarthTextWidth*4+EarthText,x
sta Lo11+_drawEarthLineXOffset
lda EarthTextWidth*5+EarthText,x
sta Lo12+_drawEarthLineXOffset
lda EarthTextWidth*6+EarthText,x
sta Lo13+_drawEarthLineXOffset
lda EarthTextWidth*7+EarthText,x
sta Lo14+_drawEarthLineXOffset
lda EarthTextWidth*8+EarthText,x
sta Lo15+_drawEarthLineXOffset
lda EarthTextWidth*9+EarthText,x
sta Lo16+_drawEarthLineXOffset
rts
**************************************************
* Plot single dot on right column of screen
**************************************************
_maxStarHeight equ #24
GenStarRight
:loop jsr GetRand
cmp #_maxStarHeight
bge :loop
tay
ldx #39 ; right column
lda #"."
jsr PlotXY
rts
:gotMinSize asl ; *2 for table lookup
tax
lda LoLineTable,x
sta dstPtr
lda LoLineTable+1,x
sta dstPtr+1
ldy #39
lda #"."
sta (dstPtr),y
rts
**************************************************
* Plot single char (in accumulator) to X,Y
**************************************************
PlotXY pha
phx
tya
asl
tax
lda LoLineTable,x
sta dstPtr
lda LoLineTable+1,x
sta dstPtr+1
ply
pla
sta (dstPtr),y
rts
ScrollLeft
pha
phx
ldx #0
:loop lda Lo01+1,x
sta Lo01,x
lda Lo02+1,x
sta Lo02,x
lda Lo03+1,x
sta Lo03,x
lda Lo04+1,x
sta Lo04,x
lda Lo05+1,x
sta Lo05,x
lda Lo06+1,x
sta Lo06,x
lda Lo07+1,x
sta Lo07,x
lda Lo08+1,x
sta Lo08,x
lda Lo09+1,x
sta Lo09,x
lda Lo10+1,x
sta Lo10,x
lda Lo11+1,x
sta Lo11,x
lda Lo12+1,x
sta Lo12,x
lda Lo13+1,x
sta Lo13,x
lda Lo14+1,x
sta Lo14,x
lda Lo15+1,x
sta Lo15,x
lda Lo16+1,x
sta Lo16,x
lda Lo17+1,x
sta Lo17,x
lda Lo18+1,x
sta Lo18,x
lda Lo19+1,x
sta Lo19,x
lda Lo20+1,x
sta Lo20,x
lda Lo21+1,x
sta Lo21,x
lda Lo22+1,x
sta Lo22,x
lda Lo23+1,x
sta Lo23,x
lda Lo24+1,x
sta Lo24,x
inx
cpx #39
beq :done
jmp :loop
:done lda #" "
sta Lo01,x
sta Lo02,x
sta Lo03,x
sta Lo04,x
sta Lo05,x
sta Lo06,x
sta Lo07,x
sta Lo08,x
sta Lo09,x
sta Lo10,x
sta Lo11,x
sta Lo12,x
sta Lo13,x
sta Lo14,x
sta Lo15,x
sta Lo16,x
sta Lo17,x
sta Lo18,x
sta Lo19,x
sta Lo20,x
sta Lo21,x
sta Lo22,x
sta Lo23,x
sta Lo24,x
plx
pla
rts
ScrollRightUp
ldx #22 , x start
:loop lda Lo02,x
sta Lo01,x
lda Lo03,x
sta Lo02,x
lda Lo04,x
sta Lo03,x
lda Lo05,x
sta Lo04,x
lda Lo06,x
sta Lo05,x
lda Lo07,x
sta Lo06,x
lda Lo08,x
sta Lo07,x
lda Lo09,x
sta Lo08,x
lda Lo10,x
sta Lo09,x
lda Lo11,x
sta Lo10,x
lda Lo12,x
sta Lo11,x
lda Lo13,x
sta Lo12,x
lda Lo14,x
sta Lo13,x
lda Lo15,x
sta Lo14,x
lda Lo16,x
sta Lo15,x
lda Lo17,x
sta Lo16,x
lda Lo18,x
sta Lo17,x
lda Lo19,x
sta Lo18,x
lda Lo20,x
sta Lo19,x
lda Lo21,x
sta Lo20,x
lda Lo22,x
sta Lo21,x
lda Lo23,x
sta Lo22,x
lda Lo24,x
sta Lo23,x
lda #" "
sta Lo24,x
inx
cpx #40
beq :done
jmp :loop
:done rts
**************************************************
* SafeWait
* -silly triple loop, preserves AXY
**************************************************
SimplerWait phx
phy
tax
tay
jsr SimpleWait
ply
plx
rts
SimpleWait
sta _waitA
stx _waitX
sty _waitY
lda _waitA
:parentWait
ldx _waitX
:secondWait
ldy _waitY
:innerWait
dey
bne :innerWait
dex
bne :secondWait
dec
bne :parentWait
:waitDone
lda _waitA
ldx _waitX
ldy _waitY
rts
_waitA db 0
_waitX db 0
_waitY db 0
**************************************************
* SetProdropGr / SetProdropText
* - set the operating mode of the prodrop effect
**************************************************
SetProdropGr
lda #$00
bra SetProdropChar
SetProdropText
lda #" "
SetProdropChar
sta ]dropCharCompare
sta ]dropCharWrite
jmp DemoNext
**************************************************
* Multiply8x8
* params: a,x = 8bit multipliers
* result: stored in _multiplyResult and returned in a,x
**************************************************
Multiply8x8
stz _multiplyResult
stz _multiplyResult+1
cmp #0 ; short circuit on A = 0
beq :multiplyDone
cpx #0 ; short circuit on X = 0
beq :multiplyDone
tay
:loop tya ; sorry, i suck at asm maths routines
clc
adc _multiplyResult
sta _multiplyResult
bcc :next
inc _multiplyResult+1
:next dex
bne :loop
:multiplyDone lda _multiplyResult
ldx _multiplyResult+1
rts
_multiplyResult dw 0000
**************************************************
* See if we're running on a IIgs
* From Apple II Technote:
* Miscellaneous #7
* Apple II Family Identification
**************************************************
DetectIIgs
sec ;Set carry bit (flag)
jsr $FE1F ;Call to the monitor
bcs :oldmachine ;If carry is still set, then old machine
* bcc :newmachine ;If carry is clear, then new machine
:newmachine lda #1
sta GMachineIIgs
rts
:oldmachine stz GMachineIIgs
rts
InitState
lda GMachineIIgs
beq :IIe
rts
:IIe rts
VBlankSafe pha
phx
phy
jsr VBlank
ply
plx
pla
rts
VBlank lda _vblType
bne :IIc
jsr VBlankNormal
rts
:IIc rts
_vblType db 0 ; 0 - normal, 1 - IIc
**************************************************
* Wait for vertical blanking interval - IIe/IIgs
**************************************************
VBlankNormal
:loop1 lda RDVBLBAR
bpl :loop1 ; not VBL
:loop lda $c019
bmi :loop ;wait for beginning of VBL interval
rts
**************************************************
* Keyboard equates
**************************************************
K_CTRL equ $60
K_ESC equ $9b
K_DELETE equ $7f
K_SHIFT equ $20
K_CTRL_S equ "s"-K_CTRL
K_CTRL_P equ "n"-K_CTRL
**************************************************
* Lores/Text lines
* @todo: finalize as include?
**************************************************
Lo01 equ $400
Lo02 equ $480
Lo03 equ $500
Lo04 equ $580
Lo05 equ $600
Lo06 equ $680
Lo07 equ $700
Lo08 equ $780
Lo09 equ $428
Lo10 equ $4a8
Lo11 equ $528
Lo12 equ $5a8
Lo13 equ $628
Lo14 equ $6a8
Lo15 equ $728
Lo16 equ $7a8
Lo17 equ $450
Lo18 equ $4d0
Lo19 equ $550
Lo20 equ $5d0
* the "plus four" lines
Lo21 equ $650
Lo22 equ $6d0
Lo23 equ $750
Lo24 equ $7d0
LoLineTable da Lo01,Lo02,Lo03,Lo04,Lo05,Lo06
da Lo07,Lo08,Lo09,Lo10,Lo11,Lo12
da Lo13,Lo14,Lo15,Lo16,Lo17,Lo18
da Lo19,Lo20,Lo21,Lo22,Lo23,Lo24
**************************************************
* Color look up table.
* Fire values 0 through F get translated to these
**************************************************
ds \
*ColorIdx ds 16 ; we copy the palettes below to here
ColorIdx ; fake it for now
; bottom / top color
ColorIdxColor dfb #$00 ; BLK / BLK
dfb #$22 ; D.BLU / D.BLU
dfb #$55 ; D.GRY / D.GRY
dfb #$55 ; D.GRY / D.GRY
dfb #$12 ; RED / D.BLUE
dfb #$18 ; RED / BROWN
dfb #$98 ; ORNG / BROWN
dfb #$99 ; ORNG / ORNG
dfb #$b9 ; PINK / ORNG
dfb #$Db ; YELO / PINK
dfb #$DD ; YELO / YELO
dfb #$DD ; YELO / YELO
dfb #$FD ; WHITE / YELO
dfb #$FF ; WHITE / WHITE
dfb #$FF ; WHITE / WHITE
dfb #$FF ; WHITE / WHITE
ColorIdxMono
dfb #$00 ; BLK / BLK
dfb #$11 ; D.BLU / D.BLU
dfb #$08 ; D.GRY / D.GRY
dfb #$42 ; D.GRY / D.GRY
dfb #$43 ; RED / D.BLUE
dfb #$53 ; RED / BROWN
dfb #$55 ; ORNG / BROWN
dfb #$65 ; ORNG / ORNG
dfb #$67 ; PINK / ORNG
dfb #$97 ; YELO / PINK
dfb #$F7 ; YELO / YELO
dfb #$FD ; YELO / YELO
dfb #$FF ; WHITE / YELO
dfb #$FF ; WHITE / WHITE
dfb #$FF ; WHITE / WHITE
dfb #$FF ; WHITE / WHITE
**************************************************
* Data Segments
**************************************************
ds \
DSEG0 ds 1024 ; General 1K Data Store
DSEG1 ds 1024 ; Secondary (overflow region?)
;DSEG2 ds 4096 ; Secondary (overflow region?)
**************************************************
* Global Variables
**************************************************
GKeyEvent db 0 ; keypress - allow subroutines to access
GDemoState db 0 ; current demo state
GMachineIIgs db 0 ; machine identification flag
use festrodata ; all the sprites and such
use soundengine ; bleep, boops and clicks
use applerom ; softswitch locations, etc
lst on
sav /code/festro.sys
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