;TODO ;High Priority: ; -pterry needs to flap (kernal timing issue) ; -players should touch floor....(kernal issue) ;Medium Priority: ; -physics need to be checked ; -change speed or computer warmup time w/ difficulty switches? ; pterry (and ball) has one pixel descend 3/4 over on screen (kernal) ; -ball should be bigger (kernal) ; -reconsider multiple ball angles? ;Low Priority ; -if pterry flaps, maybe wings up on descend, down on ascend ; -color of players could be different ;; -colors could be improved in general ; -make bricks colorful (if easy to do...) ; -pterry "looks" at player who was ahead on title? ; -Z26, bogus joystick move at start? ;DONE ;high ; -ball not bouncing right offa right player ; -score kernal messed up... ; -ball not bouncing right off pterry ; -framerate problem on title screen ; -music voices needs to be reset after game ; -player graphic problem on title screen ; -wall needs to reset for new game ; -ball needs to stop after game won... ; ; medium ; -music has better voice ; -wall/no wall game option ; make sure pterry is actually centered for title ; put ball out of drawing range on title screen ; ensure bricks initialized to match what happens when they hit select. ; -computer might be too smart ; !!!Tried Al's idea of computer flap limitator--works great ; -fixed slight jitter on pressing select on title screen ; low ; kick in music on game over? ; make computer flap go longer so it doesn't flicker so much ;; -start game w/ fire button ; -change option on select down, not on select up ; -change gamemode w/ joystick ; JoustPong by Kirk Israel processor 6502 include vcs.h include macro.h ;-------------------------------------- ;CONSTANTS ;-------------------------------------- CEILING_HEIGHT = #88 CEILING_HALF = #44 ;-16 ;SLOW_GRAV_LO_BYTE = #%11110000 ;SLOW_GRAV_HI_BYTE = #%11111111 ;-11 SLOW_GRAV_LO_BYTE = #%11110101 SLOW_GRAV_HI_BYTE = #%11111111 SLOW_REBOUND_LO_BYTE = #%00000000 SLOW_REBOUND_HI_BYTE = #%11111111 SLOW_FLAP_LO_BYTE = #%11001000 SLOW_FLAP_HI_BYTE = #%00000000 FAST_FLAP_LO_BYTE = #%00000000 FAST_FLAP_HI_BYTE = #%00000001 ;128 ;SLOW_BALL_RIGHT_SPEED_LO_BYTE = #%10000000 ;SLOW_BALL_RIGHT_SPEED_HI_BYTE = #%00000000 ;SLOW_BALL_LEFT_SPEED_LO_BYTE = #%10000000 ;SLOW_BALL_LEFT_SPEED_HI_BYTE = #%11111111 ;128 SLOW_BALL_RIGHT_SPEED_LO_BYTE = #%11000000 SLOW_BALL_RIGHT_SPEED_HI_BYTE = #%00000000 SLOW_BALL_LEFT_SPEED_LO_BYTE = #%01000000 SLOW_BALL_LEFT_SPEED_HI_BYTE = #%11111111 MIN_COMPUTER_REST_TIME = #15 GAMEFIELD_HEIGHT_IN_BRICKS = #22 SPRITEHEIGHT = #8 ;floor heights are different, because heights are actually ;relative to the 'top' of the player or ball, but we want to ;make sure that the bottoms are hitting the floor FLOOR_HEIGHT_FOR_BALL = #4 FLOOR_HEIGHT_FOR_PLAYERS = #10 STRENGTH_OF_CEILING_REBOUND = #3; SCORE_KERNAL_LENGTH = #5 GAME_KERNAL_LENGTH = #88 LENGTH_OF_FLAPSOUND = #15 PITCH_OF_FLAPSOUND = #15 ;2!,8-,15 all kind of worked TYPE_OF_FLAPSOUND = #2 VOLUME_OF_PONGHIT = #7 PITCH_OF_PONGHIT = #7 PITCH_OF_GOAL = #15 PITCH_OF_PONG_WALL_HIT = #25 ;was 6 pixel height, 6 scanlines per ; 74 - 36 = 38 PIXEL_HEIGHT_OF_TITLE = #30 PIXEL_HEIGHT_OF_TITLE_PONG = #7 SCANLINES_PER_TITLE_PIXEL = #2 WINNING_SCORE = #10 BALLPOS_LEFT = #5 ;had to hack so it didn't show up on right side before reset... BALLPOS_CENTER = #80 BALLPOS_RIGHT = #160 PTERRY_LEFT_BOUNDARY = #25 ;had to hack so it didn't show up on right side before reset... PTERRY_RIGHT_BOUNDARY = #125 MUSICRIFF_NOTECOUNT = #16 MUSICBEAT_NOTECOUNT = #12 PTERRY_LENGTH_OF_WINGCHANGE = #10 PTERRY_LENGTH_TIL_BOREDOM = #40 VOICE_FOR_MUSIC = #6 ;12 orig ;#3 is good enginey ;6 is good low tone, 10 ;9 ok, fartyish VOICE_FOR_BEAT = #8 ;-------------------------------------- ;VARIABLES ;-------------------------------------- SEG.U VARS ORG $80 slowP0YCoordFromBottom ds 2 slowP0YSpeed ds 2 slowP1YCoordFromBottom ds 2 slowP1YSpeed ds 2 p0VisibleLine ds 1 p0DrawBuffer ds 1 p1VisibleLine ds 1 p1DrawBuffer ds 1 but0WasOn ds 1 but1WasOn ds 1 ballPosFromBot ds 1 ballVisibleLine ds 1 ballVertSpeed ds 1 ballBuffer ds 1 p0score ds 1 p1score ds 1 pointerP0Score ds 2 pointerP1Score ds 2 pointerP0Graphic ds 2 pointerP1Graphic ds 2 booleanBallRight ds 1 flapsoundRemaining ds 1 booleanGameIsTwoPlayers ds 1 variableGameMode ds 1 booleanSelectSwitchIsDown ds 1 booleanResetSwitchIsDown ds 1 booleanGameOver ds 1 booleanOverrideSelectChangeThisTime ds 1 bufferPFLeft ds 1;;WALL;; bufferPFRight ds 1;;WALL;; playfieldMatrixLeft ds 22;;WALL;; playfieldMatrixRight ds 22;;WALL;; musicRiffNotePointer ds 2 musicRiffNoteCounter ds 1 musicRiffNoteTimeLeft ds 1 musicBeatNotePointer ds 2 musicBeatNoteCounter ds 1 musicBeatNoteTimeLeft ds 1 PS_temp ds 1 ballXposition ds 2 booleanPterryGoesRight ds 1 booleanPterryWingIsUp ds 1 counterPterryWingChange ds 1 pointerPterryGraphic ds 2 pterryHorizPosition ds 1 varPterryVerticalPos ds 1 varPterryBoredCounter ds 1 varPterryBehavior ds 1 varPterryWasHitWithBall ds 1 tempVar ds 1 saveStack ds 2 booleanIsOnTitleScreen ds 1 varTimeComputerResting ds 1 ;MIN_COMPUTER_REST_TIME msgVar ds 1 echo ($100 - *) , "bytes of RAM left" SEG CODE org $F000 ;MAXIMUM_SPEED = #6 ;-------------------------------------- ;BOILER PLATE STARTUP ;-------------------------------------- Start sei cld txs ldx #$FF lda #0 ClearMem sta 0,X dex bne ClearMem ;-------------------------------------- ;OTHER INITIALIZATIONS ;-------------------------------------- lda #0 sta COLUBK sta GRP0 sta GRP1 sta PF0 sta PF1 sta PF2 lda #1 sta variableGameMode lda #>GraphicsPage ;grab the hight byte of the graphic location for score graphics.... sta pointerP0Graphic+1 ;2 byte memory lookup sta pointerP1Graphic+1 sta pointerP0Score+1 sta pointerP1Score+1 sta pointerPterryGraphic+1 lda #33 sta COLUP0 ;Set P0 Reddish lda #66 sta COLUP1 ;Set P1 Purplish ;lda #%11111111 lda #1 sta booleanGameIsTwoPlayers lda #%00000000 ; for wall... BricksInitRoutine ldx #GAMEFIELD_HEIGHT_IN_BRICKS-1 InitTheBricksLoop;;WALL;; sta playfieldMatrixLeft,X sta playfieldMatrixRight,X; dex; ;every other NoMoBricks bne InitTheBricksLoop;;WALL;; ;-------------------------------------- ;START THE TITLE SCREEN ;-------------------------------------- TitleStart lda #100 sta ballPosFromBot lda #14 sta slowP0YCoordFromBottom+1 lda #14 sta slowP1YCoordFromBottom+1 lda #14 sta varPterryVerticalPos lda #0 sta booleanBallRight ;start ball moving right lda #BALLPOS_CENTER sta pterryHorizPosition ;ok, now we're getting the usual 'just hit reset stuff' lda #$1F sta COLUPF ;colored playfield for title lda #0 sta CTRLPF ;playfield ain't reflected ;sta AUDV0 ;sta AUDV1 ; position and setup players sta WSYNC sta RESM1 ldx #7 posDelay dex bne posDelay nop nop sta RESP1 sta RESBL ldx #3 posDelay2 dex bne posDelay2 sta RESP0 nop sta RESM0 lda #%00010000 sta HMP0 lda #%10000000 sta HMM0 sta WSYNC sta HMOVE lda #$88 sta COLUP0 lda #$28 sta COLUP1 lda #2 sta NUSIZ0 lda #5 sta NUSIZ1 ; setup stack for PHP trick tsx stx saveStack ldx #ENABL-1 txs lda #0 sta HMP0 ;-------------------------------------- ;-------------------------------------- ; TITLE SCREEN ;-------------------------------------- ;-------------------------------------- TitleMainLoop ;MainLoop starts with usual VBLANK code, ;and the usual timer seeding lda #2 sta VSYNC sta WSYNC sta WSYNC sta WSYNC lda #43 sta TIM64T lda #0 sta VSYNC lda SWCHA eor #%11111111 bne TitleSelectIsDownNow ; jmp doneCheckingStick doneCheckingStick lda SWCHB ;read console switches and #%00000001 ;is game reset? bne TitleResetWasNotHit ;(no, sjip next jump) jmp MainGameStart ;yes, go to start of game TitleResetWasNotHit lda SWCHB ;read console switches again and #%00000010 ;is game select? bne TitleSelectIsNotDownNow ;(no, skip next jump) TitleSelectIsDownNow lda booleanSelectSwitchIsDown bne TitleDoneCheckingSelect ; we already did it... lda booleanOverrideSelectChangeThisTime ;we don't change anything if they bne TitleDoneCheckingSelect ;pressed select to get out of normal gamplay. lda #1 sta booleanSelectSwitchIsDown ;go down to next game mode (7 through 0), reset to 7 if -1 dec variableGameMode bpl doneResetingGameMode lda #3 sta variableGameMode doneResetingGameMode DoEffectssOfCurrentGameSelection lda variableGameMode and #%00000001 sta booleanGameIsTwoPlayers lda variableGameMode and #%00000010 beq fillBricksEmpty lda #%00100000 ; for wall... jmp doneFillBricks fillBricksEmpty lda #%00000000 ; for wall... doneFillBricks ldx #GAMEFIELD_HEIGHT_IN_BRICKS-1 InitTheBricksLoopBySelect sta playfieldMatrixLeft,X sta playfieldMatrixRight,X; dex; bne InitTheBricksLoopBySelect jmp TitleDoneCheckingSelect TitleSelectIsNotDownNow lda #0 sta booleanSelectSwitchIsDown TitleDoneCheckingSelect lda #0 sta booleanOverrideSelectChangeThisTime ;let fire button start lda INPT4 bmi NoButton0ToStartGame jmp MainGameStart NoButton0ToStartGame lda INPT5 bmi NoButton1ToStartGame jmp MainGameStart NoButton1ToStartGame ;music! lda #1 sta booleanIsOnTitleScreen jmp makeminemusic doneWithMusicOutOfGame TitleWaitForVblankEnd lda INTIM bne TitleWaitForVblankEnd sta VBLANK lda #0 sta CTRLPF ;playfield ain't reflected ;just burning scanlines....you could do something else ldy #20 ;20 scanlines ;FIRST WE DO JOUST TitlePreLoop sta WSYNC ;wait for sync for each one... dey bne TitlePreLoop lda #$1E sta COLUPF ;diagnostic ; lda variableGameMode ;#%00001101; msgVar ; sta PF1 ldx #PIXEL_HEIGHT_OF_TITLE ; X will hold what letter pixel we're on ldy #SCANLINES_PER_TITLE_PIXEL ; Y will hold which scan line we're on for each pixel ; ;the next part is careful cycle counting from those ;who have gone before me to get full non-reflected playfield TitleShowLoop sta WSYNC lda PFDataTitleJoust0Left-1,X ;[0]+4 sta PF0 ;[4]+3 = *7* < 23 ;PF0 visible lda PFDataTitleJoust1Left-1,X ;[7]+4 sta PF1 ;[11]+3 = *14* < 29 ;PF1 visible lda PFDataTitleJoust2Left-1,X ;[14]+4 sta PF2 ;[18]+3 = *21* < 40 ;PF2 visible nop ;[21]+2 nop ;[23]+2 nop ;[25]+2 ;six cycles available Might be able to do something here lda PFDataTitleJoust0Right-1,X ;[27]+4 ;PF0 no longer visible, safe to rewrite sta PF0 ;[31]+3 = *34* lda PFDataTitleJoust1Right-1,X ;[34]+4 ;PF1 no longer visible, safe to rewrite sta PF1 ;[38]+3 = *41* lda PFDataTitleJoust2Right-1,X ;[41]+4 ;PF2 rewrite must begin at exactly cycle 45!!, no more, no less sta PF2 ;[45]+2 = *47* ; > dey ;ok, we've drawn one more scaneline for this 'pixel' bne NotChangingWhatTitlePixel ;go to not changing if we still have more to do for this pixel dex ; we *are* changing what title pixel we're on... beq DoneWithTitle ; ...unless we're done, of course ldy #SCANLINES_PER_TITLE_PIXEL ;...so load up Y with the count of how many scanlines for THIS pixel... NotChangingWhatTitlePixel jmp TitleShowLoop DoneWithTitle nop nop nop lda #$7C sta COLUPF ldx #PIXEL_HEIGHT_OF_TITLE_PONG ; X will hold what letter pixel we're on ldy #SCANLINES_PER_TITLE_PIXEL ; Y will hold which scan line we're on for each pixel ; ;THEN WE DO PONG PongTitleShowLoop sta WSYNC lda PFDataTitlePong0Left-1,X ;[0]+4 sta PF0 ;[4]+3 = *7* < 23 ;PF0 visible lda PFDataTitlePong1Left-1,X ;[7]+4 sta PF1 ;[11]+3 = *14* < 29 ;PF1 visible lda PFDataTitlePong2Left-1,X ;[14]+4 sta PF2 ;[18]+3 = *21* < 40 ;PF2 visible nop ;[21]+2 nop ;[23]+2 nop ;[25]+2 ;six cycles available Might be able to do something here lda PFDataTitlePong0Right-1,X ;[27]+4 ;PF0 no longer visible, safe to rewrite sta PF0 ;[31]+3 = *34* lda PFDataTitlePong1Right-1,X ;[34]+4 ;PF1 no longer visible, safe to rewrite sta PF1 ;[38]+3 = *41* lda PFDataTitlePong2Right-1,X ;[41]+4 ;PF2 rewrite must begin at exactly cycle 45!!, no more, no less sta PF2 ;[45]+2 = *47* ; > dey ;ok, we've drawn one more scaneline for this 'pixel' bne NotChangingWhatPongTitlePixel ;go to not changing if we still have more to do for this pixel dex ; we *are* changing what title pixel we're on... beq DoneWithPongTitle ; ...unless we're done, of course ldy #SCANLINES_PER_TITLE_PIXEL ;...so load up Y with the count of how many scanlines for THIS pixel... NotChangingWhatPongTitlePixel ; stx tempVar ; ; lda #7 ; clc ; cmp tempVar ; bcc DoneCheckingChangePFColor ; jmp PongTitleShowLoop DoneWithPongTitle ;clear out the playfield registers for obvious reasons lda #0 sta PF2 ;clear out PF2 first, I found out through experience sta PF0 sta PF1 ;just burning scanlines.... ldy #24 TitlePostLoop sta WSYNC dey bne TitlePostLoop lda #1 sta CTRLPF ;playfield ain't reflected lda # Current scannline SEC;; new SBC slowP0YCoordFromBottom+1 ; 3 ;copyint ADC #SPRITEHEIGHT ; 2 calc if sprite is drawn sta WSYNC ;*** BCC skipDrawLeftTitle ; 2/3 To skip or not to skip? TAY ; 2 not necessary when Y holds scannline lda (pointerP0Graphic),y sta p0DrawBuffer ;WingUpGraphic,Y ; 4 Select shape continueLeftTitle: STA GRP0 ; 3 Execute Write here! sta p0DrawBuffer ; 3 save for next line lda #0 sta PF0 ; skipDraw routine for right player (21 cycles) TXA ; 2 A-> Current scannline SEC SBC slowP1YCoordFromBottom+1 ;copyIntegerCoordP1 ; 3 ADC #SPRITEHEIGHT+1 ; 2 calc if sprite is drawn BCC skipDrawRightTitle ; 2/3 To skip or not to skip? TAY ; 2 not necessary when Y holds scannline lda (pointerP1Graphic),y;LDA WingDownGraphic,Y ; 4 Select shape continueRightTitle: STA GRP0 ; 3 Execute Write here! sta p1DrawBuffer ; 3 save for next line txa lsr lsr tay ; --------------- line 2 sta WSYNC lda playfieldMatrixLeft,Y sta bufferPFLeft sta PF0 ; draw left player lda p0DrawBuffer sta GRP0 ; draw ball PLA CPX ballPosFromBot PHP ; draw right PF lda playfieldMatrixRight,Y sta PF0 ; draw right player lda p1DrawBuffer sta GRP0 ; skipDraw routine for ptery (18 cycles) TXA ; 2 A-> Current scannline SEC SBC varPterryVerticalPos ; 3 ADC #SPRITEHEIGHT ; 2 calc if sprite is drawn BCC skipDrawPteryTitle ; 2/3 To skip or not to skip? TAY ; 2 not necessary when Y holds scannline LDA PterryWingDownGraphic,Y ;LDA (pointerPterryGraphic),Y ; 4 Select shape continuePteryTitle: STA GRP1 ; 3 Execute Write here! dex bne scanLoopTitle stx GRP0 stx GRP1 ;just burning scanlines....you could do something else ldy #44 TitlePostPostLoop sta WSYNC dey bne TitlePostPostLoop ; usual vblank lda #2 sta VBLANK ldx #30 TitleOverScanWait sta WSYNC dex bne TitleOverScanWait jmp TitleMainLoop ;-------------------------------------- ;-------------------------------------- ; MAIN GAME ;-------------------------------------- ;-------------------------------------- MainGameStart lda #%00010001 sta CTRLPF lda #CEILING_HALF sta slowP0YCoordFromBottom + 1 ;44 in integer part of players position sta slowP1YCoordFromBottom + 1 ;('bout half way up) lda #CEILING_HALF - 10 sta varPterryVerticalPos lda #0 sta varPterryBoredCounter sta varPterryBehavior lda #0 sta slowP0YCoordFromBottom ;0 in fractional part of players position sta slowP1YCoordFromBottom ;0 in all player's speed, integer and fractional sta slowP0YSpeed + 1 sta slowP0YSpeed sta slowP1YSpeed + 1 sta slowP1YSpeed ;zero out scores and game being over sta p0score sta p1score sta booleanGameOver lda #>GraphicsPage ;grab the high byte of the graphic location sta pointerP0Graphic+1 ;2 byte memory lookup sta pointerP1Graphic+1 sta pointerPterryGraphic+1 lda variableGameMode and #%00000010 beq fillBricksEmptyOnStart lda #%00100000 ; for wall... jmp doneFillBricksOnStart fillBricksEmptyOnStart lda #%00000000 ; for wall... doneFillBricksOnStart ldx #GAMEFIELD_HEIGHT_IN_BRICKS-1 InitTheBricksLoopByStart sta playfieldMatrixLeft,X sta playfieldMatrixRight,X; dex; bne InitTheBricksLoopByStart ;-------------------------------------- ;SETTING UP PLAYFIELD AND BALL ETC ;-------------------------------------- lda #99 sta COLUPF ;color here lda #BALLPOS_CENTER sta ballXposition+1 lda #1 sta ballVertSpeed ;!!!position ball lda #41 sta ballPosFromBot ;double player graphic ; lda #%00000100 ; sta NUSIZ0 ;seed the sound buffers lda #TYPE_OF_FLAPSOUND sta AUDC0 ;type of sound lda #PITCH_OF_FLAPSOUND sta AUDF0 ;pitch lda #4 sta AUDC1 ;type of sound ;-------------------------------------- ;-------------------------------------- ;START MAIN LOOP W/ VSYNC ;-------------------------------------- ;-------------------------------------- MainLoop lda SWCHB and #%00000001 ;is game reset? bne ResetWasNotHit ;if so jump to MainGame jmp MainGameStart ResetWasNotHit lda SWCHB and #%00000010 ;is game select hit? bne SelectWasNotHit ;if so jump to the title screen ;hopefully these are the only initialzations we have to perform? ;might need to change logic if not... lda #0 sta CTRLPF ;playfield ain't reflected LDA #VOICE_FOR_MUSIC STA AUDC0 LDA #VOICE_FOR_BEAT;8 STA AUDC1 lda #1 sta booleanOverrideSelectChangeThisTime jmp TitleStart ;jmp TitleSelectIsDownNow SelectWasNotHit lda #2 sta VSYNC sta WSYNC sta WSYNC sta WSYNC lda #43 sta TIM64T lda #0 sta VSYNC sta AUDV1 ;volume for dinger ; ; for now assume wings are up ; ;-------------------------------------- ;SEE IF BUTTON 0 IS NEWLY PRESSED ;-------------------------------------- CheckButton0 lda INPT4 bmi NoButton0 ;buttons down, graphic is down... lda #Score0Graphic ;grab the hight byte of the graphic location ; sta pointerP0Score+1 OkToDrawScoreP1 lda p1score ;accumulator = score asl ;accumulator = score * 2 asl ;accumulator = score * 4 adc p1score ;accumulator = (score * 4) + score = score * 5 adc #Score0Graphic ;grab the hight byte of the graphic location ; sta pointerP1Score+1 DoneSeeingIfWeDrawScores ;-------------------------------------- ;DIMINISH FLAP SOUND ;-------------------------------------- lda flapsoundRemaining bmi NoFlapSound sta AUDV0 ;volume dec flapsoundRemaining NoFlapSound ldx #22;;WALL;; lda playfieldMatrixLeft,X;;WALL;; sta bufferPFLeft;;WALL;; lda playfieldMatrixRight,X;;WALL;; sta bufferPFRight;;WALL;; ;lda slowP0YCoordFromBottom+1 ;sta copyIntegerCoordP0 ;lda slowP1YCoordFromBottom+1 ;sta copyIntegerCoordP1 ;------------------------------------ ;PTERRY PTIME!!! ;------------------------------------ ;varPterryVerticalPos ds 1 ; ;varPterryBoredCounter ds 1 ;varPterryBehavior ds 1 ;see if pterrry is bored flying up or down or level... ;when varPterryBoredCounter counts down to zero, Pterry does something new dec varPterryBoredCounter bpl doneChangingPterryBehavior lda #PTERRY_LENGTH_TIL_BOREDOM sta varPterryBoredCounter ;pterry's bored; change to next behavior dec varPterryBehavior bne DoneResettingPterryBehavior ;goes 4,3,2,1: of 0, reset to 4 lda #4 sta varPterryBehavior DoneResettingPterryBehavior doneChangingPterryBehavior lda varPterryBehavior and #1 ;see if it's odd bne doneChangingPterryHeight lda varPterryBehavior and #2 bne changePterryHeightUp dec varPterryVerticalPos jmp doneChangingPterryHeight changePterryHeightUp inc varPterryVerticalPos doneChangingPterryHeight lda booleanPterryGoesRight beq PterryMustBeGoingLeft PterryMustBeGoingRight lda #%00000000 sta REFP1 inc pterryHorizPosition lda #PTERRY_RIGHT_BOUNDARY cmp pterryHorizPosition bcs DoneNotReboundOffRightBoundary lda #0 sta booleanPterryGoesRight DoneNotReboundOffRightBoundary jmp DoneMovingPterry PterryMustBeGoingLeft lda #%00001000 sta REFP1 dec pterryHorizPosition lda #PTERRY_LEFT_BOUNDARY clc cmp pterryHorizPosition bcc DoneNotReboundOffLeftBoundary lda #1 sta booleanPterryGoesRight DoneNotReboundOffLeftBoundary DoneMovingPterry ;make Pterry's wing flap.... lda counterPterryWingChange bne NotTimeToChangePterryWing lda #PTERRY_LENGTH_OF_WINGCHANGE sta counterPterryWingChange lda booleanPterryWingIsUp eor #%11111111 sta booleanPterryWingIsUp NotTimeToChangePterryWing dec counterPterryWingChange ;assume lda # Current scannline SEC;; new SBC slowP0YCoordFromBottom+1 ; 3 ;copyint ADC #SPRITEHEIGHT ; 2 calc if sprite is drawn sta WSYNC ;*** BCC skipDrawLeft ; 2/3 To skip or not to skip? TAY ; 2 not necessary when Y holds scannline lda (pointerP0Graphic),y sta p0DrawBuffer ;WingUpGraphic,Y ; 4 Select shape continueLeft: STA GRP0 ; 3 Execute Write here! sta p0DrawBuffer ; 3 save for next line lda #0 sta PF0 ; skipDraw routine for right player (21 cycles) TXA ; 2 A-> Current scannline SEC SBC slowP1YCoordFromBottom+1 ;copyIntegerCoordP1 ; 3 ADC #SPRITEHEIGHT+1 ; 2 calc if sprite is drawn BCC skipDrawRight ; 2/3 To skip or not to skip? TAY ; 2 not necessary when Y holds scannline lda (pointerP1Graphic),y;LDA WingDownGraphic,Y ; 4 Select shape continueRight: STA GRP0 ; 3 Execute Write here! sta p1DrawBuffer ; 3 save for next line txa lsr lsr tay ; --------------- line 2 sta WSYNC lda playfieldMatrixLeft,Y sta bufferPFLeft sta PF0 ; draw left player lda p0DrawBuffer sta GRP0 ; draw ball PLA CPX ballPosFromBot PHP ; draw right PF lda playfieldMatrixRight,Y sta PF0 ; draw right player lda p1DrawBuffer sta GRP0 ; skipDraw routine for ptery (18 cycles) TXA ; 2 A-> Current scannline SEC SBC varPterryVerticalPos ; 3 ADC #SPRITEHEIGHT ; 2 calc if sprite is drawn BCC skipDrawPtery ; 2/3 To skip or not to skip? TAY ; 2 not necessary when Y holds scannline LDA PterryWingDownGraphic,Y ;LDA (pointerPterryGraphic),Y ; 4 Select shape continuePtery: STA GRP1 ; 3 Execute Write here! dex bne scanLoop ; --------------- end of kernel ; blank players stx GRP0 stx GRP1 stx PF0 stx ENABL stx COLUBK ;sta WSYNC lda #$06 ;grey for background... sta COLUBK lda #0 sta GRP0 sta GRP1 sta WSYNC lda #2 sta WSYNC sta VBLANK endkernal ldx #30 OverScanWait sta WSYNC dex bne OverScanWait sta PF0 lda #$00 sta COLUBK jmp MainLoop ; ;MUSIC! ; makeminemusic LDA #VOICE_FOR_MUSIC STA AUDC0 LDA #VOICE_FOR_BEAT STA AUDC1 DEC musicRiffNoteTimeLeft BPL DoneWithChangingNote DEC musicRiffNoteCounter BPL DoneCheckResetNoteCounter LDA #MUSICRIFF_NOTECOUNT-1 STA musicRiffNoteCounter DoneCheckResetNoteCounter LDY musicRiffNoteCounter LDA MusicLengthData,Y STA musicRiffNoteTimeLeft DEC musicRiffNoteTimeLeft ;off by one error... LDA MusicPitchData,Y BMI ZeroOutSound STA AUDF0 LDA #12 ;noise STA AUDV0 JMP DoneSettingPitchAndVolume ZeroOutSound LDA #0 ;silence STA AUDV0 DoneSettingPitchAndVolume DoneWithChangingNote DEC musicBeatNoteTimeLeft BPL DoneWithChangingBeat DEC musicBeatNoteCounter BPL DoneCheckResetBeatCounter LDA #MUSICBEAT_NOTECOUNT-1 STA musicBeatNoteCounter DoneCheckResetBeatCounter LDY musicBeatNoteCounter LDA BeatLengthData,Y STA musicBeatNoteTimeLeft DEC musicBeatNoteTimeLeft ;off by one error... LDA BeatPitchData,Y BMI ZeroOutBeatSound STA AUDF1 LDA #8 ;noise STA AUDV1 JMP DoneSettingBeatPitchAndVolume ZeroOutBeatSound LDA #0 ;silence STA AUDV1 DoneSettingBeatPitchAndVolume DoneWithChangingBeat lda booleanIsOnTitleScreen beq musicReturnToGame jmp doneWithMusicOutOfGame musicReturnToGame jmp doneWithMusicInGameScreen org $FE00 ;-------------------------------------- ;GRAPHICS ;-------------------------------------- GraphicsPage .byte #%00000000 ;here to stop page errors WingUpGraphicLeft .byte #%00001100 .byte #%00001100 .byte #%10001100 .byte #%11011100 .byte #%11111100 .byte #%01111100 .byte #%00101100 .byte #%00001100 .byte #%00000000 ;here because my skipdraw's a bit off... WingDownGraphicLeft .byte #%00001100 .byte #%00011100 .byte #%00111100 .byte #%01111100 .byte #%01111100 .byte #%00111100 .byte #%00001100 .byte #%00001100 .byte #%00000000 ;here because my skipdraw's a bit off... WingUpGraphicRight .byte #%00110000 .byte #%00110000 .byte #%00110001 .byte #%00111011 .byte #%00111111 .byte #%00111110 .byte #%00110100 .byte #%00110000 .byte #%00000000 ;here because my skipdraw's a bit off... WingDownGraphicRight .byte #%00110000 .byte #%00111000 .byte #%00111100 .byte #%00111110 .byte #%00111110 .byte #%00111100 .byte #%00110000 .byte #%00110000 .byte #%00000000 ;here because my skipdraw's a bit off... PterryWingUpGraphic .byte #%00000000 .byte #%00000000 .byte #%01111101 .byte #%11111110 .byte #%01110100 .byte #%00111110 .byte #%01110001 .byte #%11100000 .byte #%00000000 ;here because my skipdraw's a bit off... PterryWingDownGraphic .byte #%11100000 .byte #%01110000 .byte #%00111000 .byte #%01111100 .byte #%11111111 .byte #%01110100 .byte #%00001111 .byte #%00000000 .byte #%00000000 ;here because my skipdraw's a bit off... SimpleFuji .byte #%00000000 .byte #%00000000 .byte #%10010010 .byte #%01010100 .byte #%00101000 .byte #%00101000 .byte #%00101000 .byte #%00101000 .byte #%00000000 .byte #%00000000 Score0Graphic .byte #%00111100 .byte #%01000010 .byte #%01000010 .byte #%01000010 .byte #%00111100 Score1Graphic .byte #%00111110 .byte #%00001000 .byte #%00001000 .byte #%00101000 .byte #%00011000 Score2Graphic .byte #%01111110 .byte #%01100000 .byte #%00011100 .byte #%01000010 .byte #%00111100 Score3Graphic .byte #%01111100 .byte #%00000010 .byte #%00011100 .byte #%00000010 .byte #%01111100 Score4Graphic .byte #%00000100 .byte #%00000100 .byte #%01111110 .byte #%01000100 .byte #%01000100 Score5Graphic .byte #%01111100 .byte #%00000010 .byte #%01111100 .byte #%01000000 .byte #%01111110 Score6Graphic .byte #%00111100 .byte #%01000010 .byte #%01111100 .byte #%01100000 .byte #%00011110 Score7Graphic .byte #%00010000 .byte #%00001000 .byte #%00000100 .byte #%00000010 .byte #%01111110 Score8Graphic .byte #%00111100 .byte #%01000010 .byte #%00111100 .byte #%01000010 .byte #%00111100 Score9Graphic .byte #%00000010 .byte #%00000010 .byte #%00011110 .byte #%00100010 .byte #%00011100 ScoreWGraphic .byte #%01000100 .byte #%10101010 .byte #%10010010 .byte #%10000010 .byte #%00000000 ScoreBlankGraphic .byte #0 .byte #0 .byte #0 .byte #0 .byte #0 PFDataTitlePong0Left .byte #%11100000 .byte #%11100000 .byte #%11100000 .byte #%11100000 .byte #%11100000 .byte #%11100000 .byte #%11100000 PFDataTitleJoust0Left .byte #%00000000 .byte #%10000000 .byte #%11000000 .byte #%11000000 .byte #%11000000 .byte #%11100000 .byte #%01100000 .byte #%01100000 .byte #%01100000 .byte #%01000000 .byte #%01000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 PFDataTitlePong1Left .byte #%00000000 .byte #%00000011 .byte #%00000011 .byte #%11110011 .byte #%00111011 .byte #%11110011 .byte #%11110000 PFDataTitleJoust1Left .byte #%00000001 .byte #%11000001 .byte #%11100011 .byte #%11100011 .byte #%11100011 .byte #%11100110 .byte #%01110110 .byte #%00110110 .byte #%00110110 .byte #%00110110 .byte #%00110100 .byte #%00110100 .byte #%00110100 .byte #%00110100 .byte #%00110100 .byte #%00110100 .byte #%00110110 .byte #%00110110 .byte #%00110110 .byte #%00110110 .byte #%10110110 .byte #%01110010 .byte #%00110011 .byte #%00010011 .byte #%00000011 .byte #%00000001 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 PFDataTitlePong2Left .byte #%00011111 .byte #%01111111 .byte #%01110001 .byte #%01110001 .byte #%01110001 .byte #%01111111 .byte #%00011111 PFDataTitleJoust2Left .byte #%00000001 .byte #%11000001 .byte #%11000011 .byte #%11000011 .byte #%11100111 .byte #%11100110 .byte #%11100110 .byte #%11100110 .byte #%01110110 .byte #%01110100 .byte #%01110100 .byte #%00110100 .byte #%00110100 .byte #%00110100 .byte #%00110100 .byte #%00110100 .byte #%00110100 .byte #%00110110 .byte #%00100110 .byte #%00100110 .byte #%00100110 .byte #%01100110 .byte #%01100111 .byte #%01000011 .byte #%01010011 .byte #%01010001 .byte #%01010000 .byte #%10110000 .byte #%10100000 .byte #%11000000 PFDataTitlePong0Right .byte #%11100000 .byte #%11100000 .byte #%11100000 .byte #%11100000 .byte #%11100000 .byte #%11100000 .byte #%11100000 PFDataTitleJoust0Right .byte #%00000000 .byte #%10110000 .byte #%10110000 .byte #%11110000 .byte #%11110000 .byte #%11110000 .byte #%11110000 .byte #%11100000 .byte #%11000000 .byte #%11000000 .byte #%11000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 .byte #%10000000 PFDataTitlePong1Right .byte #%00111100 .byte #%00111100 .byte #%01111101 .byte #%11111101 .byte #%11011101 .byte #%10011100 .byte #%00011100 PFDataTitleJoust1Right .byte #%00000100 .byte #%10001110 .byte #%10111110 .byte #%10111110 .byte #%10111111 .byte #%10111111 .byte #%10111111 .byte #%10110011 .byte #%10110001 .byte #%10100011 .byte #%10100010 .byte #%10100010 .byte #%10000110 .byte #%10000110 .byte #%10001100 .byte #%10011100 .byte #%10011000 .byte #%10111000 .byte #%10110000 .byte #%10110000 .byte #%10110010 .byte #%10110010 .byte #%10100110 .byte #%10111110 .byte #%10111100 .byte #%11011100 .byte #%11010000 .byte #%11000000 .byte #%10000000 .byte #%00000000 PFDataTitlePong2Right .byte #%01111110 .byte #%11111111 .byte #%11000011 .byte #%11110011 .byte #%00000011 .byte #%11111111 .byte #%01111110 PFDataTitleJoust2Right .byte #%00011000 .byte #%01111100 .byte #%01111110 .byte #%01111110 .byte #%01001110 .byte #%00001110 .byte #%00001110 .byte #%00000110 .byte #%00000110 .byte #%00000110 .byte #%00000110 .byte #%00000110 .byte #%00001110 .byte #%00001100 .byte #%00001100 .byte #%00001100 .byte #%00001100 .byte #%00011000 .byte #%00011001 .byte #%11111011 .byte #%01111111 .byte #%00111111 .byte #%00100111 .byte #%01000000 .byte #%01000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 .byte #%00000000 MusicPitchData .byte #-1 .byte #17 .byte #-1 .byte #17 .byte #-1 .byte #16 .byte #-1 .byte #16 .byte #-1 .byte #15 .byte #-1 .byte #15 .byte #-1 .byte #18 .byte #-1 .byte #18 MusicLengthData .byte #40 .byte #20 .byte #10 .byte #26 .byte #40 .byte #20 .byte #10 .byte #26 .byte #40 .byte #20 .byte #10 .byte #26 .byte #40 .byte #20 .byte #10 .byte #26 BeatPitchData .byte #-1 .byte #120 .byte #-1 .byte #40 .byte #-1 .byte #120 .byte #-1 .byte #120 .byte #-1 .byte #40 .byte #-1 .byte #120 BeatLengthData .byte #16 .byte #2 .byte #4 .byte #2 .byte #10 .byte #2 .byte #22 .byte #2 .byte #10 .byte #2 .byte #22 .byte #2 org $FFFC .word Start .word Start ;;assum horiz movement will be zero ; LDX #$00 ; LDA #$40 ;Left? ; BIT SWCHA ; BNE SkipMoveLeftP0 ; LDX #$10 ; LDA #%00001000 ; STA REFP0 ;show reflected version ;SkipMoveLeftP0 ; ; LDA #$80 ;Right? ; BIT SWCHA ; BNE SkipMoveRightP0 ; LDX #$F0 ; LDA %00000000 ; STA REFP0 ;SkipMoveRightP0 ; ; STX HMP0 ;set horiz movement for player 0 ; ; ;;assum horiz movement will be zero ; LDX #$00 ; LDA #$04 ;Left? ; BIT SWCHA ; BNE SkipMoveLeftP1 ; LDX #$10 ; LDA #%00001000 ; STA REFP1 ;SkipMoveLeftP1 ; ; LDA #$08 ;Right? ; BIT SWCHA ; BNE SkipMoveRightP1 ; LDX #$F0 ; LDA %00000000 ; STA REFP1 ;SkipMoveRightP1 ; ; STX HMP1 ;set horiz movement for player 0 ;BigHeadGraphic ; .byte %00111100 ; .byte %01111110 ; .byte %11000001 ; .byte %10111111 ; .byte %11111111 ; .byte %11101011 ; .byte %01111110 ; .byte %00111100 echo "Kernal alignment wastes",(kernal - waste),"bytes" if (>kernal != >endkernal) echo "WARNING: Kernel crosses a page boundary!" endif