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177 lines
5.1 KiB
ArmAsm
177 lines
5.1 KiB
ArmAsm
*
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* Pac-Man
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*
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* (c) 1983, Atari
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* (s) 2024, Antoine Vignau
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*
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sprEMPTY = 0 ; three tile possibilities
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sprDOT = 1
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sprENERGY = 2
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gINKY = 1
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gPINKY = 2
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gBLINKY = 3
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gCLYDE = 4
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dirDOWN = 0
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dirUP = 1
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dirRIGHT = 2
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dirLEFT = 3
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score1600 = 0
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score200 = 2
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score400 = 4
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score800 = 8
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NBDOTS = 248 ; 244 normal dots & 4 energizer dots
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L0300 = $0300 ; buffer area to save scores
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GHOST1MOVE = $0800 ; buffer area for ghosts moves
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GHOST2MOVE = GHOST1MOVE+256
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GHOST3MOVE = GHOST2MOVE+256
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GHOST4MOVE = GHOST3MOVE+256
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L0800 = $0800 ; $0800..$0BFF
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L0C00 = $0C00 ; board buffers per player ($380 bytes)
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L1000 = $1000 ; P2
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L1380 = $1380 ; P3
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L1700 = $1700 ; P4
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L1A80 = $1A80 ; P5
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TEXT = $0400
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TEXT2 = $0800
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HGR = $2000
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HGR2 = $4000
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HGR3 = $6000 ; does not exist but marks the area past HGR2
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CH = $24 ; firmware X-pos
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CV = $25 ; firmware Y-pos
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highSCORE = $00 ; (3 bytes) high score
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zpXBIT = $03 ; X from X-coord to X-bit offset
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zpXCOL = $04 ; Y from X-coord to X-col in screen
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deciSCORE = $05 ; (3 bytes) the decimal score
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zpTEMP1 = $08
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zpTEMP2 = $09
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zpTEMP3 = $0a
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zpTEMP4 = $0b
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zpX1 = $0c ; (word) start X
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zpX2 = $0e ; (word) end X
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zpY1 = $10 ; (byte) start Y
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zpY2 = $11 ; (byte) end Y
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zpHGR = $12 ; (word) pointer to HGR world
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zpPTR1 = $14 ; (word) 1st pointer
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zpPTR2 = $16 ; (word) 2nd pointer
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ptrMOVE = zpPTR2 ; (word) pointer to the list of authorized moves
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sprHEIGHT = $18 ; (byte) sprite height in lines
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*
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sprWIDTH = $1a ; (byte) sprite width in bytes
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zpPTR3 = $1b ; (word) pointer to board moves
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fgCOLOR = $1d ; 0: b&w, 1: color
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hgrBIT7 = $1e ; (byte) defines which palette to use ($00 or $80)
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zp1F = $1f ; (byte) $1f is no more used, see $8B7E
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* $20 to $4F are not used
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curPLAYER = $50 ; (byte) current player index
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nbPLAYERS = $51 ; (byte) number of players (1..5)
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curSCORE = $52 ; 0 (3 bytes) score
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theRANK = $55 ; 3 (byte) rank number (ie. the level)
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nbDOTS = $56 ; 4 (byte) number of dots on the board (248 by default)
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fruitFREQ = $57 ; 5 (byte) appearance frequency of a fruits
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nbLIVES = $58 ; 6 (byte) number of lives (bit 7 is set)
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frameCNT = $59 ; 7 (byte) frame counter
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fruitCNT = $5a ; (word) fruit display counter
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ptrFRUIT = $5c ; (word) pointer to the fruit sprite
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dotTEMPO = $5e ; (byte) tempo for energizer dot blinking
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fgDOTS = $5f ; (byte) 0: show dots, 1: hide dots
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*
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* Within board, X/Y coords of Pacman are:
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* UL 41/0B
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* UR D7/0B
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* LL 41/B3
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* LR D7/B3
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*
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pacmanDATA = $60 ; (struct) structure of 8 bytes
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pacmanX = $60 ; (byte) Pacman X
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pacmanY = $61 ; (byte) Pacman Y
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pacmanDIR = $62 ; (byte) Pacman direction (see above)
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theDIR = $63 ; (byte) next Pacman direction (given by input device)
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pacmanBOARD = $64 ; (byte) current index in boardMOVES where Pacman is
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pacmanNEXTBOARD = $65 ; (byte) next index in the same table, $FF if move is invalid
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pacmanSTEP = $66 ; (byte) Pacman sprite index (that makes the animation step)
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zp67 = $67 ; (byte) $67 is no more used, see $8B7E
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bonusINDEX = $68 ; (byte) 2/4/8/16 for bonus 200/400/800/1600
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pacmanINTUNNEL = $69 ; (byte) 0: Pacman not in tunnel, 1: Pacman in tunnel
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boardY = $6a ; (byte) y-coord in board
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boardX = $6b ; (byte) x-coord in board
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*
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ghostDATA = $70 ; (struct) structure of 8/20 bytes for the current ghost
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ghostX = $70 ; 0 (byte) ghost X
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ghostY = $71 ; 1 (byte) ghost Y
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ghostDIR = $72 ; 2 (byte) ghost direction (see above)
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ghostBOARD = $73 ; 3 (byte) current index in boardMOVES where the ghost is
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ghostNEXTBOARD = $74 ; 4 (byte) next index in the same table, $FF if move is invalid
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ghostMOVE = $75 ; 5 (word) pointer to the ghost move board of 256 bytes
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ghostMOVEINDEX = $77 ; 7 (byte) index within that board
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ghostFRIGHTENED = $78 ; 8 (byte) 0: ghost is not frightened, 1: ghost is frightened
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ghostISDEAD = $79 ; 9 (byte) 0: ghost is alive, dead otherwise
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* = 7a ; 10 (byte)
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* = 7b ; 11 (byte)
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* = 7c ; 12 (byte)
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* = 7d ; 13 (byte)
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* = 7e ; 14 (byte)
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* = 7f ; 15 (byte)
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ghostTEMPO = 80 ; 16 (byte) tempo to refresh a ghost (aka ghost speed)
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* 81 ; 17 (byte) ghost is dead flag
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* = 82 ; 18 (byte)
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* = 83 ; 19 (byte)
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idxGHOST_X = 0
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idxGHOST_Y = 1
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idxGHOST_DIR = 2
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idxGHOST_BOARD = 3
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idxGHOST_NEXTBOARD = 4
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idxGHOST_MOVE = 5
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idxGHOST_MOVEINDEX = 7
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idxGHOST_FRIGHTENED = 8
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idxGHOST_ISDEAD = 9
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* Each ghost data is: 84 / 98 / AC / C0
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ghost1DATA = $84
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ghost1X = ghost1DATA
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ghost1Y = ghost1DATA+1
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ghost1DIR = ghost1DATA+2
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ghost1CASE = ghost1DATA+3
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ghost1NEXTCASE = ghost1DATA+4
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ghost1FRIGHTENED = ghost1DATA+8
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ghost1DEAD = ghost1DATA+9
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*
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ghost2DATA = $98
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ghost2X = ghost2DATA
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ghost2Y = ghost2DATA+1
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ghost2FRIGHTENED = ghost2DATA+8
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ghost2DEAD = ghost2DATA+9
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*
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ghost3DATA = $ac
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ghost3X = ghost3DATA
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ghost3Y = ghost3DATA+1
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ghost3FRIGHTENED = ghost3DATA+8
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ghost3DEAD = ghost3DATA+9
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*
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ghost4DATA = $c0
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ghost4X = ghost4DATA
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ghost4Y = ghost4DATA+1
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ghost4FRIGHTENED = ghost4DATA+8
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ghost4DEAD = ghost4DATA+9
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*
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ghostINDEX = $e0 ; (byte) 1: Inky, 2: Pinky, 3: Blinky, 4: Clyde
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fgFRUIT = $e7 ; (byte) 0: fruit counter not activated, 1: fruit counter activated
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fgDEMO = $e8 ; (byte) 0: game, 1: demo
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saveVAR = $f1 ; (byte) save variable
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* $F2 is not used
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zpSPEED = f3 ; (byte) ghosts speed?
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fgMUSIC = $f4 ; (byte) 0: music never played, 1: intro music played
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theDEVICE = $f5 ; (byte) 0: joypad, 1: joystick
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