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Constants.asm
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; ===========================================================================
; Constants
; ===========================================================================
Ref_Checksum_String = 'S3CE'
; ---------------------------------------------------------------------------
; VDP addresses
; ---------------------------------------------------------------------------
VDP_data_port = $C00000
VDP_control_port = $C00004
VDP_counter = $C00008
PSG_input = $C00011
; ---------------------------------------------------------------------------
; Address equates
; ---------------------------------------------------------------------------
; Z80 addresses
Z80_RAM = $A00000 ; start of Z80 RAM
Z80_RAM_end = $A02000 ; end of non-reserved Z80 RAM
Z80_bus_request = $A11100
Z80_reset = $A11200
ym2612_a0 = $A04000
ym2612_d0 = $A04001
ym2612_a1 = $A04002
ym2612_d1 = $A04003
; ---------------------------------------------------------------------------
; I/O Area
; ---------------------------------------------------------------------------
HW_Version = $A10001
HW_Port_1_Data = $A10003
HW_Port_2_Data = $A10005
HW_Expansion_Data = $A10007
HW_Port_1_Control = $A10009
HW_Port_2_Control = $A1000B
HW_Expansion_Control = $A1000D
HW_Port_1_TxData = $A1000F
HW_Port_1_RxData = $A10011
HW_Port_1_SCtrl = $A10013
HW_Port_2_TxData = $A10015
HW_Port_2_RxData = $A10017
HW_Port_2_SCtrl = $A10019
HW_Expansion_TxData = $A1001B
HW_Expansion_RxData = $A1001D
HW_Expansion_SCtrl = $A1001F
; ---------------------------------------------------------------------------
; SRAM addresses
; ---------------------------------------------------------------------------
SRAM_access_flag = $A130F1
Security_addr = $A14000
; ---------------------------------------------------------------------------
; Level Misc
; ---------------------------------------------------------------------------
RingTable_Count: = 512 ; the maximum rings on the level. Even numbers only
ObjectTable_Count: = 768 ; the maximum objects on the level. Even numbers only
; ---------------------------------------------------------------------------
; PLC queues
; ---------------------------------------------------------------------------
PLCKosPlusM_Count: = 32 ; the greater the queues, the more RAM is used for the buffer. Even numbers only
; ---------------------------------------------------------------------------
; V-Int routines
; ---------------------------------------------------------------------------
offset := VInt_Table
ptrsize := 1
idstart := 0
VintID_Lag = id(ptr_VInt_Lag) ; 0
VintID_Main = id(ptr_VInt_Main) ; 2
VintID_Sega = id(ptr_VInt_Sega) ; 4
VintID_Menu = id(ptr_VInt_Menu) ; 6
VintID_Level = id(ptr_VInt_Level) ; 8
VintID_Fade = id(ptr_VInt_Fade) ; A
VintID_LevelSelect = id(ptr_VInt_LevelSelect) ; C
; ---------------------------------------------------------------------------
; Game mode routines
; ---------------------------------------------------------------------------
offset := Game_Modes
ptrsize := 1
idstart := 0
GameModeID_LevelSelectScreen = id(GameMode_LevelSelectScreen) ; 0
GameModeID_LevelScreen = id(GameMode_LevelScreen) ; 4
GameModeID_ContinueScreen = id(GameMode_ContinueScreen) ; 8
GameModeFlag_TitleCard = 7 ; flag bit
GameModeID_TitleCard = 1<<GameModeFlag_TitleCard ; flag mask
; ---------------------------------------------------------------------------
; Player IDs
; ---------------------------------------------------------------------------
PlayerID_Sonic equ 0
PlayerID_Tails equ 1
PlayerID_Knuckles equ 2
; ---------------------------------------------------------------------------
; Player mode IDs
; ---------------------------------------------------------------------------
PlayerModeID_SonicTails equ 0
PlayerModeID_Sonic equ 1
PlayerModeID_Tails equ 2
PlayerModeID_Knuckles equ 3
; ---------------------------------------------------------------------------
; Player routines (Sonic)
; ---------------------------------------------------------------------------
offset := Sonic_Index
ptrsize := 1
idstart := 0
PlayerID_Init = id(ptr_Sonic_Init) ; 0
PlayerID_Control = id(ptr_Sonic_Control) ; 2
PlayerID_Hurt = id(ptr_Sonic_Hurt) ; 4
PlayerID_Death = id(ptr_Sonic_Death) ; 6
PlayerID_Restart = id(ptr_Sonic_Restart) ; 8
PlayerID_Drown = id(ptr_Sonic_Drown) ; C
; ---------------------------------------------------------------------------
; palette IDs
; ---------------------------------------------------------------------------
offset := PalPointers
ptrsize := 8
idstart := 0
; Main
PalID_Sonic = id(PalPtr_Sonic) ; 0
PalID_WaterSonic = id(PalPtr_WaterSonic) ; 1
PalID_Knuckles = id(PalPtr_Knuckles) ; 2
PalID_WaterKnuckles = id(PalPtr_WaterKnuckles) ; 3
; Levels
PalID_DEZ = id(PalPtr_DEZ) ; 4
PalID_WaterDEZ = id(PalPtr_WaterDEZ) ; 5
; ---------------------------------------------------------------------------
; Sonic animation IDs
; ---------------------------------------------------------------------------
offset := AniSonic
ptrsize := 2
idstart := 0
AniIDSonAni_Walk = id(ptr_SonAni_Walk) ; 0
AniIDSonAni_Run = id(ptr_SonAni_Run) ; 1
AniIDSonAni_Roll = id(ptr_SonAni_Roll) ; 2
AniIDSonAni_Roll2 = id(ptr_SonAni_Roll2) ; 3
AniIDSonAni_Push = id(ptr_SonAni_Push) ; 4
AniIDSonAni_Wait = id(ptr_SonAni_Wait) ; 5
AniIDSonAni_Balance = id(ptr_SonAni_Balance) ; 6
AniIDSonAni_LookUp = id(ptr_SonAni_LookUp) ; 7
AniIDSonAni_Duck = id(ptr_SonAni_Duck) ; 8
AniIDSonAni_SpinDash = id(ptr_SonAni_SpinDash) ; 9
AniIDSonAni_Whistle = id(ptr_SonAni_Whistle) ; A (Unused)
AniIDSonAni_0B = id(ptr_AniSonic0B) ; B (Unused?)
AniIDSonAni_Balance2 = id(ptr_SonAni_Balance2) ; C
AniIDSonAni_Stop = id(ptr_SonAni_Stop) ; D
AniIDSonAni_Float1 = id(ptr_SonAni_Float1) ; E
AniIDSonAni_Float2 = id(ptr_SonAni_Float2) ; F
AniIDSonAni_Spring = id(ptr_SonAni_Spring) ; 10
AniIDSonAni_Hang = id(ptr_SonAni_Hang) ; 11
AniIDSonAni_12 = id(ptr_AniSonic12) ; 12
AniIDSonAni_Landing = id(ptr_SonAni_Landing) ; 13
AniIDSonAni_Hang2 = id(ptr_SonAni_Hang2) ; 14
AniIDSonAni_GetAir = id(ptr_SonAni_GetAir) ; 15
AniIDSonAni_DeathBW = id(ptr_SonAni_DeathBW) ; 16 (Unused)
AniIDSonAni_Drown = id(ptr_SonAni_Drown) ; 17
AniIDSonAni_Death = id(ptr_SonAni_Death) ; 18
AniIDSonAni_Hurt = id(ptr_SonAni_Hurt) ; 19
AniIDSonAni_Hurt2 = id(ptr_SonAni_Hurt2) ; 1A
AniIDSonAni_Slide = id(ptr_SonAni_Slide) ; 1B
AniIDSonAni_Blank = id(ptr_SonAni_Blank) ; 1C
AniIDSonAni_Hurt3 = id(ptr_SonAni_Hurt3) ; 1D
AniIDSonAni_Float3 = id(ptr_SonAni_Float3) ; 1E
AniIDSupSonAni_Transform = id(ptr_SonAni_Transform) ; 1F
AniIDSonAni_20 = id(ptr_AniSonic20) ; 20 (Unused?)
AniIDSonAni_21 = id(ptr_AniSonic21) ; 21 (Unused?)
AniIDSonAni_Carry = id(ptr_SonAni_Carry) ; 22
AniIDSonAni_Carry2 = id(ptr_SonAni_Carry2) ; 23
; ---------------------------------------------------------------------------
; Tails animation IDs
; ---------------------------------------------------------------------------
offset := AniTails
ptrsize := 2
idstart := 0
AniIDTailsAni_Run2 = id(ptr_TailsAni_Run2) ; 1F
AniIDTailsAni_Transform = id(ptr_TailsAni_Transform) ; 29
; ---------------------------------------------------------------------------
; Knuckles animation IDs
; ---------------------------------------------------------------------------
offset := AniKnuckles
ptrsize := 2
idstart := 0
AniIDKnuxAni_Carry = id(ptr_KnuxAni_Carry) ; 25
AniIDKnuxAni_Carry2 = id(ptr_KnuxAni_Carry2) ; 26
; ---------------------------------------------------------------------------
; Levels
; ---------------------------------------------------------------------------
LevelID_DEZ: equ 0 ; Death Egg
LevelID_NULL: equ $FF ; NULL
; ---------------------------------------------------------------------------
; Buttons bit numbers
; ---------------------------------------------------------------------------
button_up: equ 0
button_down: equ 1
button_left: equ 2
button_right: equ 3
button_B: equ 4
button_C: equ 5
button_A: equ 6
button_start: equ 7
; ---------------------------------------------------------------------------
; Buttons masks (1 << x == pow(2, x))
; ---------------------------------------------------------------------------
button_up_mask: equ 1<<button_up ; $01
button_down_mask: equ 1<<button_down ; $02
button_left_mask: equ 1<<button_left ; $04
button_right_mask: equ 1<<button_right ; $08
button_B_mask: equ 1<<button_B ; $10
button_C_mask: equ 1<<button_C ; $20
button_A_mask: equ 1<<button_A ; $40
button_start_mask: equ 1<<button_start ; $80
; ---------------------------------------------------------------------------
; Joypad input
; ---------------------------------------------------------------------------
btnABCS: equ %11110000 ; A, B, C or Start ($F0)
btnStart: equ %10000000 ; Start button ($80)
btnABC: equ %01110000 ; A, B or C ($70)
btnAC: equ %01100000 ; A or C ($60)
btnAB: equ %01010000 ; A or B ($50)
btnA: equ %01000000 ; A ($40)
btnBC: equ %00110000 ; B or C ($30)
btnC: equ %00100000 ; C ($20)
btnB: equ %00010000 ; B ($10)
btnDir: equ %00001111 ; Any direction ($0F)
btnDLR: equ %00001110 ; Down, Left or Right ($0E)
btnULR: equ %00001101 ; Up, Left or Right ($0D)
btnLR: equ %00001100 ; Left or Right ($0C)
btnUDR: equ %00001011 ; Up, Down or Right ($0B)
btnDR: equ %00001010 ; Down or Right ($0A)
btnUR: equ %00001001 ; Down or Right ($09)
btnR: equ %00001000 ; Right ($08)
btnUDL: equ %00000111 ; Up, Down or Left ($07)
btnDL: equ %00000110 ; Down or Left ($06)
btnUL: equ %00000101 ; Up or Left ($05)
btnL: equ %00000100 ; Left ($04)
btnUD: equ %00000011 ; Up or Down ($03)
btnDn: equ %00000010 ; Down ($02)
btnUp: equ %00000001 ; Up ($01)
; ---------------------------------------------------------------------------
; Joypad bits
; ---------------------------------------------------------------------------
bitStart: equ 7
bitA: equ 6
bitC: equ 5
bitB: equ 4
bitR: equ 3
bitL: equ 2
bitDn: equ 1
bitUp: equ 0
; ---------------------------------------------------------------------------
; Unknown or inconsistently used offsets that are not applicable to Sonic
; ---------------------------------------------------------------------------
enum objoff_00=$00,objoff_01,objoff_02,objoff_03,objoff_04,objoff_05,objoff_06
nextenum objoff_07,objoff_08,objoff_09,objoff_0A,objoff_0B,objoff_0C,objoff_0D
nextenum objoff_0E,objoff_0F,objoff_10,objoff_11,objoff_12,objoff_13,objoff_14
nextenum objoff_15,objoff_16,objoff_17,objoff_18,objoff_19,objoff_1A,objoff_1B
nextenum objoff_1C,objoff_1D,objoff_1E,objoff_1F,objoff_20,objoff_21,objoff_22
nextenum objoff_23,objoff_24,objoff_25,objoff_26,objoff_27,objoff_28,objoff_29
nextenum objoff_2A,objoff_2B,objoff_2C,objoff_2D,objoff_2E,objoff_2F,objoff_30
nextenum objoff_31,objoff_32,objoff_33,objoff_34,objoff_35,objoff_36,objoff_37
nextenum objoff_38,objoff_39,objoff_3A,objoff_3B,objoff_3C,objoff_3D,objoff_3E
nextenum objoff_3F,objoff_40,objoff_41,objoff_42,objoff_43,objoff_44,objoff_45
nextenum objoff_46,objoff_47,objoff_48,objoff_49
; ---------------------------------------------------------------------------
; property of all objects
; ---------------------------------------------------------------------------
object_size_bits = 6
object_size = $4A ; the size of an object's status table entry
next_object = object_size
; ---------------------------------------------------------------------------
; Object Status Table offsets
; Universally followed object conventions
; ---------------------------------------------------------------------------
id = objoff_00 ; long
address = id ; long
render_flags = objoff_04 ; bitfield ; refer to SCHG for details
height_pixels = objoff_06 ; byte
width_pixels = objoff_07 ; byte
priority = objoff_08 ; word ; in units of $80
art_tile = objoff_0A ; word ; PCCVH AAAAAAAAAAA ; P = priority, CC = palette line, V = y-flip; H = x-flip, A = starting cell index of art
mappings = objoff_0C ; long
x_pos = objoff_10 ; word, or long when extra precision is required
x_sub = x_pos+2 ; word
y_pos = objoff_14 ; word, or long when extra precision is required
y_sub = y_pos+2 ; word
mapping_frame = objoff_22 ; byte
; ---------------------------------------------------------------------------
; Conventions followed by most objects
; ---------------------------------------------------------------------------
routine = 5 ; byte
x_vel = objoff_18 ; word
y_vel = objoff_1A ; word
y_radius = objoff_1E ; byte ; collision height / 2
x_radius = objoff_1F ; byte ; collision width / 2
anim = objoff_20 ; byte
prev_anim = objoff_21 ; byte ; when this isn't equal to anim the animation restarts
next_anim = prev_anim ; byte ; when this isn't equal to anim the animation restarts
anim_frame = objoff_23 ; byte
anim_frame_timer = objoff_24 ; byte
angle = objoff_26 ; byte ; angle about axis into plane of the screen (00 = vertical, 360 degrees = 256)
status = objoff_2A ; bitfield ; refer to SCHG for details
; ---------------------------------------------------------------------------
; Conventions followed by many objects but not Sonic/Tails/Knuckles
; ---------------------------------------------------------------------------
x_pixel = x_pos ; word ; x-coordinate for objects using screen positioning
y_pixel = y_pos ; word ; y-coordinate for objects using screen positioning
collision_flags = objoff_28 ; byte ; TT SSSSSS ; TT = collision type, SSSSSS = size
collision_property = objoff_29 ; byte ; usage varies, bosses use it as a hit counter
shield_reaction = objoff_2B ; byte ; bit 3 = bounces off shield, bit 4 = negated by fire shield, bit 5 = negated by lightning shield, bit 6 = negated by bubble shield
subtype = objoff_2C ; byte
wait = objoff_2E ; word
aniraw = objoff_30 ; long
jump = objoff_34 ; long
count = objoff_39 ; byte
ros_bit = objoff_3B ; byte ; the bit to be cleared when an object is destroyed if the ROS flag is set
ros_addr = objoff_3C ; word ; the RAM address whose bit to clear when an object is destroyed if the ROS flag is set
routine_secondary = objoff_3C ; byte ; used by monitors for this purpose at least
vram_art = objoff_40 ; word ; address of art in VRAM (same as art_tile * $20)
parent = objoff_42 ; word ; address of the object that owns or spawned this one, if applicable
child_dx = objoff_42 ; byte ; X offset of child relative to parent
child_dy = objoff_43 ; byte ; Y offset of child relative to parent
parent4 = objoff_44 ; word
parent3 = objoff_46 ; word ; parent of child objects
parent2 = objoff_48 ; word ; several objects use this instead
respawn_addr = objoff_48 ; word ; the address of this object's entry in the respawn table
; ---------------------------------------------------------------------------
; Conventions specific to Sonic/Tails/Knuckles
; ---------------------------------------------------------------------------
ground_vel = objoff_1C ; word ; overall velocity along ground, not updated when in the air
double_jump_property = objoff_25 ; byte ; remaining frames of flight / 2 for Tails, gliding-related for Knuckles
flip_angle = objoff_27 ; byte ; angle about horizontal axis (360 degrees = 256)
status_secondary = objoff_2B ; byte ; see SCHG for details
air_left = objoff_2C ; byte
flip_type = objoff_2D ; byte ; bit 7 set means flipping is inverted, lower bits control flipping type
object_control = objoff_2E ; byte ; bit 0 set means character can jump out, bit 7 set means he can't
double_jump_flag = objoff_2F ; byte ; meaning depends on current character, see SCHG for details
flips_remaining = objoff_30 ; byte
flip_speed = objoff_31 ; byte
move_lock = objoff_32 ; word ; horizontal control lock, counts down to 0
invulnerability_timer = objoff_34 ; byte ; decremented every frame
invincibility_timer = objoff_35 ; byte ; decremented every 8 frames
speed_shoes_timer = objoff_36 ; byte ; decremented every 8 frames
status_tertiary = objoff_37 ; byte ; see SCHG for details
character_id = objoff_38 ; byte ; 0 for Sonic, 1 for Tails, 2 for Knuckles
scroll_delay_counter = objoff_39 ; byte ; incremented each frame the character is looking up/down, camera starts scrolling when this reaches 120
next_tilt = objoff_3A ; byte ; angle on ground in front of character
tilt = objoff_3B ; byte ; angle on ground
stick_to_convex = objoff_3C ; byte ; used to make character stick to convex surfaces such as the rotating discs in CNZ
spin_dash_flag = objoff_3D ; byte ; bit 1 indicates spin dash, bit 7 indicates forced roll
spin_dash_counter = objoff_3E ; word
restart_timer = objoff_3E ; word
jumping = objoff_40 ; byte
interact = objoff_42 ; word ; RAM address of the last object the character stood on
default_y_radius = objoff_44 ; byte ; default value of y_radius
default_x_radius = objoff_45 ; byte ; default value of x_radius
top_solid_bit = objoff_46 ; byte ; the bit to check for top solidity (either $C or $E)
lrb_solid_bit = objoff_47 ; byte ; the bit to check for left/right/bottom solidity (either $D or $F)
; ---------------------------------------------------------------------------
; Conventions followed by some/most bosses
; ---------------------------------------------------------------------------
boss_saved_player = objoff_1C ; byte ; save player address after hit
boss_invulnerable_time = objoff_1D ; byte ; flash time
boss_backup_collision = objoff_25 ; byte ; restore boss collision after hit
boss_hitcount2 = objoff_29 ; byte ; usage varies, bosses use it as a hit counter
; ---------------------------------------------------------------------------
; Object variables
; ---------------------------------------------------------------------------
obId = address ; long
obRender = render_flags ; byte ; bitfield for x/y flip, display mode
obRoutine = routine ; byte ; routine number
obHeight = height_pixels ; byte ; height/2
obWidth = width_pixels ; byte ; width/2
obPriority = priority ; word ; sprite stack priority -- 0 is front
obGfx = art_tile ; word ; palette line & VRAM setting (2 bytes)
obMap = mappings ; long ; mappings address (4 bytes)
obX = x_pos ; word ; x-axis position (2-4 bytes)
obY = y_pos ; word ; y-axis position (2-4 bytes)
obVelX = x_vel ; word ; x-axis velocity (2 bytes)
obVelY = y_vel ; word ; y-axis velocity (2 bytes)
obInertia = ground_vel ; word ; potential speed (2 bytes)
obAnim = anim ; byte ; current animation
obNextAni = next_anim ; byte ; next animation
obFrame = mapping_frame ; byte ; current frame displayed
obAniFrame = anim_frame ; byte
obTimeFrame = anim_frame_timer ; byte
obAngle = angle ; byte
obColType = collision_flags ; byte ; collision response type
obColProp = collision_property ; byte ; collision extra property
obStatus = status ; byte ; orientation or mode
obSubtype = subtype ; byte ; object subtype
obTimer = wait ; word ; object timer
obParent = parent ; word ; parent of child objects
obParent4 = parent4 ; word ; parent of child objects
obParent3 = parent3 ; word ; parent of child objects
obParent2 = parent2 ; word ; parent of child objects
obRespawnNo = respawn_addr ; word ; the address of this object's entry in the respawn table
; ---------------------------------------------------------------------------
; When childsprites are activated (i.e. bit #6 of render_flags set)
; ---------------------------------------------------------------------------
mainspr_childsprites = objoff_16 ; word ; amount of child sprites
subspr_data = objoff_18
sub2_x_pos = objoff_18
sub2_y_pos = objoff_1A
sub2_mapframe = objoff_1D
sub3_x_pos = objoff_1E
sub3_y_pos = objoff_20
sub3_mapframe = objoff_23
sub4_x_pos = objoff_24
sub4_y_pos = objoff_26
sub4_mapframe = objoff_29
sub5_x_pos = objoff_2A
sub5_y_pos = objoff_2C
sub5_mapframe = objoff_2F
sub6_x_pos = objoff_30
sub6_y_pos = objoff_32
sub6_mapframe = objoff_35
sub7_x_pos = objoff_36
sub7_y_pos = objoff_38
sub7_mapframe = objoff_3B
sub8_x_pos = objoff_3C
sub8_y_pos = objoff_3E
sub8_mapframe = objoff_41
sub9_x_pos = objoff_42
sub9_y_pos = objoff_44
sub9_mapframe = objoff_47
next_subspr = 6 ; size
; ---------------------------------------------------------------------------
; Bits 3-6 of an object's status after a SolidObject call is a
; bitfield with the following meaning:
; ---------------------------------------------------------------------------
p1_standing_bit = 3
p2_standing_bit = p1_standing_bit + 1
p1_standing = 1<<p1_standing_bit
p2_standing = 1<<p2_standing_bit
pushing_bit_delta = 2
p1_pushing_bit = p1_standing_bit + pushing_bit_delta
p2_pushing_bit = p1_pushing_bit + 1
p1_pushing = 1<<p1_pushing_bit
p2_pushing = 1<<p2_pushing_bit
standing_mask = p1_standing|p2_standing
pushing_mask = p1_pushing|p2_pushing
; ---------------------------------------------------------------------------
; The high word of d6 after a SolidObject call is a bitfield
; with the following meaning:
; ---------------------------------------------------------------------------
p1_touch_side_bit = 0
p2_touch_side_bit = p1_touch_side_bit + 1
p1_touch_side = 1<<p1_touch_side_bit
p2_touch_side = 1<<p2_touch_side_bit
touch_side_mask = p1_touch_side|p2_touch_side
p1_touch_bottom_bit = p1_touch_side_bit + pushing_bit_delta
p2_touch_bottom_bit = p1_touch_bottom_bit + 1
p1_touch_bottom = 1<<p1_touch_bottom_bit
p2_touch_bottom = 1<<p2_touch_bottom_bit
touch_bottom_mask = p1_touch_bottom|p2_touch_bottom
p1_touch_top_bit = p1_touch_bottom_bit + pushing_bit_delta
p2_touch_top_bit = p1_touch_top_bit + 1
p1_touch_top = 1<<p1_touch_top_bit
p2_touch_top = 1<<p2_touch_top_bit
touch_top_mask = p1_touch_top|p2_touch_top
; ---------------------------------------------------------------------------
; Player status variables
; ---------------------------------------------------------------------------
Status_Facing = 0
Status_InAir = 1
Status_Roll = 2
Status_OnObj = 3
Status_Push = 5
Status_Underwater = 6
; ---------------------------------------------------------------------------
; Player status secondary variables
; ---------------------------------------------------------------------------
Status_Shield = 0
Status_Invincible = 1
Status_SpeedShoes = 2
Status_FireShield = 4
Status_LtngShield = 5
Status_BublShield = 6
; ---------------------------------------------------------------------------
; Object status variables
; ---------------------------------------------------------------------------
Status_FlipX = 0 ; used by Animate_Sprite
Status_FlipY = 1 ; used by Animate_Sprite
Status_Touch = 6 ; some/most bosses
Status_Defeated = 7 ; some/most bosses
; ---------------------------------------------------------------------------
; Universal (used on all standard levels)
; ---------------------------------------------------------------------------
ArtTile_VRAM_Start = 0
ArtTile_SpikesSprings = $484
ArtTile_Monitors = $4AC
ArtTile_CutsceneKnuckles = $4DA
ArtTile_Explosion = $5A0
ArtTile_StarPost = $5E4
ArtTile_Player_1 = $680
ArtTile_Player_2 = $6A0
ArtTile_Player_2_Tail = $6B0
ArtTile_Ring = $6BC
ArtTile_Ring_Sparks = ArtTile_Ring+4
ArtTile_HUD = $6C4
ArtTile_Shield = $79C
ArtTile_Shield_Sparks = ArtTile_Shield+$1F
ArtTile_LifeIcon = $7D4
ArtTile_DashDust = $7E0
ArtTile_DashDust_P2 = $7F0
; ---------------------------------------------------------------------------
; VRAM and tile art base addresses
; VRAM Reserved regions
; ---------------------------------------------------------------------------
VRAM_Plane_A_Name_Table = $C000 ; extends until $CFFF
VRAM_Plane_W_Name_Table = $C000 ; extends until $CFFF
VRAM_Plane_B_Name_Table = $E000 ; extends until $EFFF
VRAM_Plane_Table_Size = $1000 ; 64 cells x 32 cells x 2 bytes per cell
VRAM_Sprite_Attribute_Table = $F800 ; extends until $FA7F
VRAM_Sprite_Attribute_Table_Size = $280 ; 640 bytes
VRAM_Horiz_Scroll_Table = $F000 ; extends until $FF7F
VRAM_Horiz_Scroll_Table_Size = 224*2*2 ; 224 lines * 2 bytes per entry * 2 PNTs
; ---------------------------------------------------------------------------
; VRAM data
; ---------------------------------------------------------------------------
vram_fg: = VRAM_Plane_A_Name_Table ; foreground namespace
vram_window: = VRAM_Plane_W_Name_Table ; window namespace
vram_bg: = VRAM_Plane_B_Name_Table ; background namespace
vram_hscroll: = VRAM_Horiz_Scroll_Table ; horizontal scroll table
vram_sprites: = VRAM_Sprite_Attribute_Table ; sprite table
; ---------------------------------------------------------------------------
; Colours
; ---------------------------------------------------------------------------
cBlack: equ 0 ; colour black
cWhite: equ $EEE ; colour white
cBlue: equ $E00 ; colour blue
cGreen: equ $E0 ; colour green
cRed: equ $E ; colour red
cYellow: equ cGreen+cRed ; colour yellow
cAqua: equ cGreen+cBlue ; colour aqua
cMagenta: equ cBlue+cRed ; colour magenta
; ---------------------------------------------------------------------------
; Art tile stuff
; ---------------------------------------------------------------------------
flip_x = (1<<11)
flip_y = (1<<12)
flip_bit_x = 3
flip_bit_y = 4
palette_bit_0 = 5
palette_bit_1 = 6
palette_line0 = (0<<13)
palette_line_0 = (0<<13)
palette_line1 = (1<<13)
palette_line_1 = (1<<13)
palette_line2 = (2<<13)
palette_line_2 = (2<<13)
palette_line3 = (3<<13)
palette_line_3 = (3<<13)
palette_line_size = 16*2 ; 16 word entries
high_priority_bit = 7
high_priority = (1<<15)
palette_mask = $6000
tile_size = 8*8/2
plane_size_64x32 = 64*32*2
tile_mask = $7FF
nontile_mask = $F800
drawing_mask = $7FFF
; ---------------------------------------------------------------------------
; Sprite priority
; ---------------------------------------------------------------------------
priority_0 = sprite_priority(0) ; high priority
priority_1 = sprite_priority(1)
priority_2 = sprite_priority(2)
priority_3 = sprite_priority(3)
priority_4 = sprite_priority(4)
priority_5 = sprite_priority(5)
priority_6 = sprite_priority(6)
priority_7 = sprite_priority(7) ; low priority
; ---------------------------------------------------------------------------
; Sprite render screen flags
; ---------------------------------------------------------------------------
rfCoord = %00000100 ; screen coordinates flag ($04)
rfStatic = %00100000 ; static mappings flag ($20)
rfMulti = %01000000 ; multi-draw flag ($40)
rfOnscreen = %10000000 ; on-screen flag ($80)
; ---------------------------------------------------------------------------
; Sprite render screen bits
; ---------------------------------------------------------------------------
rbCoord = 2 ; screen coordinates bit
rbStatic = 5 ; static mappings bit
rbMulti = 6 ; multi-draw bit
rbOnscreen = 7 ; on-screen bit
; ---------------------------------------------------------------------------
; Animation flags
; ---------------------------------------------------------------------------
afEnd = $FF ; return to beginning of animation
afBack = $FE ; go back (specified number) bytes
afChange = $FD ; run specified animation
afRoutine = $FC ; increment routine counter and continue load next anim bytes
afReset = $FB ; move offscreen for remove(Using the Sprite_OnScreen_Test, etc...)
; ---------------------------------------------------------------------------
; Animation Raw flags
; ---------------------------------------------------------------------------
arfIndex = $FF ; go to animate raw index
arfEnd = $FE ; return to beginning of animation
arfChange = $FC ; run specified animation (specified offset)
arfJump = $FA ; jump from $34(a0) address
; ---------------------------------------------------------------------------
; Subroutine constants
; ---------------------------------------------------------------------------
; main
JoypadInit = Init_Controllers ; alias from Sonic 1/2 (Hivebrain/GitHub)
ReadJoypads = Poll_Controllers ; alias from Sonic 1/2 (Hivebrain/GitHub)
Joypad_Read = Poll_Controller ; alias from Sonic 2 (GitHub)
VDPSetupGame = Init_VDP ; alias from Sonic 1/2 (Hivebrain/GitHub)
InitDMAQueue = Init_DMA_Queue ; alias from Sonic 2 (GitHub)
ProcessDMAQueue = Process_DMA_Queue ; alias from Sonic 1/2 (Hivebrain/GitHub)
QueueDMATransfer = Add_To_DMA_Queue ; alias from Sonic 1/2 (Hivebrain/GitHub)
ClearScreen = Clear_DisplayData ; alias from Sonic 1/2 (Hivebrain/GitHub)
ShowVDPGraphics = Plane_Map_To_VRAM ; alias from Sonic 1 (Hivebrain)
PlaneMapToVRAM = Plane_Map_To_VRAM ; alias from Sonic 2 (GitHub)
TilemapToVRAM = Plane_Map_To_VRAM ; alias from Sonic 1 (GitHub)
PlaneMapToVRAM2 = Plane_Map_To_VRAM_2 ; alias from Sonic 2 (GitHub)
PlaneMapToVRAM3 = Plane_Map_To_VRAM_3 ; alias from Sonic 2 (GitHub)
EniDec = Eni_Decomp ; alias from Sonic 1/2 (Hivebrain/GitHub)
KosPlusDec = KosPlus_Decomp ; alias from Sonic 1/2 (Hivebrain/GitHub)
Pal_FadeTo = Pal_FadeFromBlack ; alias from Sonic 1 (Hivebrain)
PaletteFadeIn = Pal_FadeFromBlack ; alias from Sonic 1 (GitHub)
Pal_FadeIn = Pal_FromBlack ; alias from Sonic 1 (Hivebrain)
FadeIn_FromBlack = Pal_FromBlack ; alias from Sonic 1 (GitHub)
Pal_FadeFrom = Pal_FadeToBlack ; alias from Sonic 1 (Hivebrain)
PaletteFadeOut = Pal_FadeToBlack ; alias from Sonic 1 (GitHub)
Pal_FadeOut = Pal_ToBlack ; alias from Sonic 1 (Hivebrain)
FadeOut_ToBlack = Pal_ToBlack ; alias from Sonic 1 (GitHub)
Pal_FromBlackWhite = Pal_FadeFromWhite ; alias from S3K Disassembly (2011)
PalLoad1 = LoadPalette ; alias from Sonic 1 (Hivebrain)
PalLoad_Fade = LoadPalette ; alias from Sonic 1 (GitHub)
PalLoad_ForFade = LoadPalette ; alias from Sonic 2 (GitHub)
PalLoad2 = LoadPalette_Immediate ; alias from Sonic 1 (Hivebrain)
PalLoad = LoadPalette_Immediate ; alias from Sonic 1 (GitHub)
PalLoad_Now = LoadPalette_Immediate ; alias from Sonic 2 (GitHub)
PalLoad3_Water = LoadPalette2 ; alias from Sonic 1 (Hivebrain)
PalLoad_Fade_Water = LoadPalette2 ; alias from Sonic 1 (GitHub)
PalLoad_Water_Now = LoadPalette2 ; alias from Sonic 2 (GitHub)
PalLoad4_Water = LoadPalette2_Immediate ; alias from Sonic 1 (Hivebrain)
PalLoad_Water = LoadPalette2_Immediate ; alias from Sonic 1 (GitHub)
PalLoad_Water_ForFade = LoadPalette2_Immediate ; alias from Sonic 2 (GitHub)
DelayProgram = Wait_VSync ; alias from Sonic 1 (Hivebrain)
WaitForVBla = Wait_VSync ; alias from Sonic 1 (GitHub)
WaitForVint = Wait_VSync ; alias from Sonic 2 (GitHub)
RandomNumber = Random_Number ; alias from Sonic 1/2 (Hivebrain/GitHub)
CalcAngle = GetArcTan ; alias from Sonic 1/2 (Hivebrain/GitHub)
CalcSine = GetSineCosine ; alias from Sonic 1/2 (Hivebrain/GitHub)
PauseGame = Pause_Game ; alias from Sonic 1/2 (Hivebrain/GitHub)
; objects
RunObjects = Process_Sprites ; alias from Sonic 2 (GitHub)
ObjectsLoad = Process_Sprites ; alias from Sonic 1 (Hivebrain)
ExecuteObjects = Process_Sprites ; alias from Sonic 1 (GitHub)
BuildSprites = Render_Sprites ; alias from Sonic 1/2 (Hivebrain/GitHub)
AddPoints = HUD_AddToScore ; alias from Sonic 1/2 (Hivebrain/GitHub)
AnimateSprite = Animate_Sprite ; alias from Sonic 1/2 (Hivebrain/GitHub)
ObjectFall = MoveSprite ; alias from Sonic 1 (Hivebrain)
ObjectMoveAndFall = MoveSprite ; alias from Sonic 2 (GitHub)
SpeedToPos = MoveSprite2 ; alias from Sonic 1 (Hivebrain)
ObjectMove = MoveSprite2 ; alias from Sonic 2 (GitHub)
DisplaySprite = Draw_Sprite ; alias from Sonic 1/2 (Hivebrain/GitHub)
DeleteObject = Delete_Current_Sprite ; alias from Sonic 1/2 (Hivebrain/GitHub)
DeleteChild = Delete_Referenced_Sprite ; alias from Sonic 1 (GitHub)
DeleteObject2 = Delete_Referenced_Sprite ; alias from Sonic 1/2 (Hivebrain/GitHub)
SingleObjLoad = Create_New_Sprite ; alias from Sonic 1 (Hivebrain)
AllocateObject = Create_New_Sprite ; alias from Sonic 2/3K (GitHub)
FindFreeObj = Create_New_Sprite ; alias from Sonic 1 (GitHub)
SingleObjLoad2 = Create_New_Sprite3 ; alias from Sonic 1 (Hivebrain)
FindNextFreeObj = Create_New_Sprite3 ; alias from Sonic 1 (GitHub)
AllocateObjectAfterCurrent = Create_New_Sprite3 ; alias from Sonic 2/3K (GitHub)
Find_Sonic = Find_SonicObject ; alias for SCE
Shot_ObjectInSonic = Shot_Object ; alias for SCE
MarkObjGone = Sprite_OnScreen_Test ; alias from Sonic 1/2 (Hivebrain/GitHub)
RememberState = Sprite_OnScreen_Test ; alias from Sonic 1 (GitHub)
MarkObjGone_Collision = Sprite_CheckDeleteTouch3 ; alias for SCE
RememberState_Collision = Sprite_CheckDeleteTouch3 ; alias for SCE
Sprite_OnScreen_Test_Collision = Sprite_CheckDeleteTouch3 ; alias for SCE
ObjHitFloor = ObjCheckFloorDist ; alias from Sonic 1 (Hivebrain)
ObjFloorDist = ObjCheckFloorDist ; alias from Sonic 1 (GitHub)
ObjHitFloor2 = ObjCheckFloorDist2 ; alias from Sonic 1 (Hivebrain)
ObjFloorDist2 = ObjCheckFloorDist2 ; alias from Sonic 1 (GitHub)
ObjHitWallRight = ObjCheckRightWallDist ; alias from Sonic 1 (GitHub)
ObjHitCeiling = ObjCheckCeilingDist ; alias from Sonic 1 (GitHub)
ObjHitWallLeft = ObjCheckLeftWallDist ; alias from Sonic 1 (GitHub)
SolidObject = SolidObjectFull ; alias from Sonic 1/2 (Hivebrain/GitHub)
SolidObject_Always = SolidObjectFull2 ; alias from Sonic 2 (GitHub)
CollectRing = GiveRing ; alias from Sonic 1/2 (Hivebrain/GitHub)
ReactToItem = TouchResponse ; alias from Sonic 1 (GitHub)
HurtSonic = HurtCharacter ; alias from Sonic 1 (Hivebrain/GitHub)
KillSonic = Kill_Character ; alias from Sonic 1 (Hivebrain/GitHub)
Lamp_StoreInfo = Save_StarPost_Settings ; alias from Sonic 1 (GitHub)
Lamp_LoadInfo = Load_StarPost_Settings ; alias from Sonic 1 (GitHub)
; ---------------------------------------------------------------------------
; RAM constants
; ---------------------------------------------------------------------------
; RAM variables
v_ram_start = RAM_start ; alias from Sonic 1 (GitHub)
; object variables
v_player = Player_1 ; alias from Sonic 1 (GitHub)
; scroll variables
v_hscrolltablebuffer = H_scroll_buffer ; alias from Sonic 1 (GitHub)
Horiz_Scroll_Buf = H_scroll_buffer ; alias from Sonic 2 (GitHub)
v_hscrolltablebuffer_end = H_scroll_buffer_end ; alias from Sonic 1 (GitHub)
HScroll_table = H_scroll_table ; alias from Sonic 3K (GitHub)
; table variables
v_tracksonic = Pos_table ; alias from Sonic 1 (GitHub)
; DMA variables
VDP_Command_Buffer = DMA_queue ; alias from Sonic 2 (GitHub)
VDP_Command_Buffer_Slot = DMA_queue_slot ; alias from Sonic 2 (GitHub)
; camera variables
v_screenposx = Camera_X_pos ; alias from Sonic 1 (GitHub)
v_screenposy = Camera_Y_pos ; alias from Sonic 1 (GitHub)
v_trackpos = Pos_table_index ; alias from Sonic 1 (GitHub)
v_trackbyte = Pos_table_index+1 ; alias from Sonic 1 (GitHub)
v_lookshift = Distance_from_top ; alias from Sonic 1 (GitHub)
Screen_shake_flag = Screen_shaking_flag ; alias from Sonic 3K (GitHub)
Screen_shake_offset = Screen_shaking_offset ; alias from Sonic 3K (GitHub)
Screen_shake_last_offset = Screen_shaking_last_offset ; alias from Sonic 3K (GitHub)
; misc variables
v_gamemode = Game_mode ; alias from Sonic 1 (GitHub)
v_vbla_routine = V_int_routine ; alias from Sonic 1 (GitHub)
SonicControl = Ctrl_1_logical ; alias from Sonic 1 (Vladikcomper)
v_jpadhold2 = Ctrl_1_held_logical ; alias from Sonic 1 (GitHub)
v_jpadpress2 = Ctrl_1_pressed_logical ; alias from Sonic 1 (GitHub)
Joypad = Ctrl_1 ; alias from Sonic 1 (Vladikcomper)
Ctrl_1_hold = Ctrl_1_held ; alias from Sonic 2 (GitHub)
v_jpadhold1 = Ctrl_1_held ; alias from Sonic 1 (GitHub)
v_jpadpress1 = Ctrl_1_pressed ; alias from Sonic 1 (GitHub)
Ctrl_1_press = Ctrl_1_pressed ; alias from Sonic 2 (GitHub)
Ctrl_2_hold = Ctrl_2_held ; alias from Sonic 2 (GitHub)
v_jpad2hold1 = Ctrl_2_held ; alias from Sonic 1 (GitHub)
v_jpad2press1 = Ctrl_2_pressed ; alias from Sonic 1 (GitHub)
Ctrl_2_press = Ctrl_2_pressed ; alias from Sonic 2 (GitHub)
v_vdp_buffer1 = VDP_reg_1_command ; alias from Sonic 1 (GitHub)
v_demolength = Demo_timer ; alias from Sonic 1 (GitHub)
v_scrposy_dup = V_scroll_value ; alias from Sonic 1 (GitHub)
v_scrposy_vdp = V_scroll_value_FG ; alias from Sonic 1 (GitHub)
v_bgscrposy_vdp = V_scroll_value_BG ; alias from Sonic 1 (GitHub)
v_scrposx_dup = H_scroll_value ; alias from Sonic 1 (GitHub)
v_scrposx_vdp = H_scroll_value_FG ; alias from Sonic 1 (GitHub)
v_bgscrposx_vdp = H_scroll_value_BG ; alias from Sonic 1 (GitHub)
v_hbla_hreg = H_int_counter_command ; alias from Sonic 1 (GitHub)
v_hbla_line = H_int_counter ; alias from Sonic 1 (GitHub)
v_random = RNG_seed ; alias from Sonic 1 (GitHub)
v_pfade_start = Palette_fade_index ; alias from Sonic 1 (GitHub)
v_pfade_size = Palette_fade_count ; alias from Sonic 1 (GitHub)
; lag variables
f_hbla_pal = H_int_flag ; alias from Sonic 1 (GitHub)
Hint_flag = H_int_flag ; alias from Sonic 2 (GitHub)
f_doupdatesinhblank = Do_Updates_in_H_int ; alias from Sonic 1 (GitHub)
f_lockctrl = Ctrl_1_locked ; alias from Sonic 1 (GitHub)
v_framecount = Level_frame_counter ; alias from Sonic 1 (GitHub)
v_framebyte = Level_frame_counter+1 ; alias from Sonic 1 (GitHub)
f_pause = Game_paused ; alias from Sonic 1 (GitHub)
f_restart = Restart_level_flag ; alias from Sonic 1 (GitHub)
v_spritecount = Sprites_drawn ; alias from Sonic 1 (GitHub)
v_sonspeedmax = Max_speed ; alias from Sonic 1 (GitHub)
Sonic_top_speed = Max_speed ; alias from Sonic 2 (GitHub)
v_sonspeedacc = Acceleration ; alias from Sonic 1 (GitHub)
Sonic_acceleration = Acceleration ; alias from Sonic 2 (GitHub)
v_sonspeeddec = Deceleration ; alias from Sonic 1 (GitHub)
Sonic_deceleration = Deceleration ; alias from Sonic 2 (GitHub)
v_sonframenum = Player_prev_frame ; alias from Sonic 1 (GitHub)
Sonic_LastLoadedDPLC = Player_prev_frame ; alias from Sonic 2 (GitHub)
Tails_LastLoadedDPLC = Player_prev_frame_P2 ; alias from Sonic 2 (GitHub)
TailsTails_LastLoadedDPLC = Player_prev_frame_P2_tail ; alias from Sonic 2 (GitHub)
f_lockscreen = Boss_flag
; water variables
Water_Level_1 = Water_level ; alias from Sonic 2 (GitHub)
Water_Level_2 = Mean_water_level ; alias from Sonic 2 (GitHub)
Water_Level_3 = Target_water_level ; alias from Sonic 2 (GitHub)
Water_on = Water_speed ; alias from Sonic 2 (GitHub)
Water_move = Water_full_screen_flag ; alias from Sonic 2 (GitHub)
Water_fullscreen_flag = Water_full_screen_flag ; alias from Sonic 2 (GitHub)
; water variables
v_pal_water_dup = Target_water_palette ; alias from Sonic 1 (GitHub)
v_pal_water = Water_palette ; alias from Sonic 1 (GitHub)
v_pal_dry = Normal_palette ; alias from Sonic 1 (GitHub)
v_pal_dry_dup = Target_palette ; alias from Sonic 1 (GitHub)
; main variables
v_vbla_count = V_int_run_count ; alias from Sonic 1 (GitHub)
v_vbla_word = V_int_run_count+2 ; alias from Sonic 1 (GitHub)
v_vbla_byte = V_int_run_count+3 ; alias from Sonic 1 (GitHub)
Vint_runcount = V_int_run_count ; alias from Sonic 2 (GitHub)
v_zone = Current_zone ; alias from Sonic 1 (GitHub)
v_act = Current_act ; alias from Sonic 1 (GitHub)
Last_star_pole_hit = Last_star_post_hit ; alias from Sonic 2 (GitHub)
v_lives = Life_count ; alias from Sonic 1 (GitHub)
v_continues = Continue_count ; alias from Sonic 1 (GitHub)
v_scorelife = Next_extra_life_score ; alias from Sonic 1 (GitHub)
f_timeover = Time_over_flag ; alias from Sonic 1 (GitHub)
v_lifecount = Extra_life_flags ; alias from Sonic 1 (GitHub)
v_score = Score ; alias from Sonic 1 (GitHub)
f_ringcount = Update_HUD_ring_count ; alias from Sonic 1 (GitHub)
f_timecount = Update_HUD_timer ; alias from Sonic 1 (GitHub)
f_scorecount = Update_HUD_score ; alias from Sonic 1 (GitHub)
v_rings = Ring_count ; alias from Sonic 1 (GitHub)
v_ringbyte = Ring_count+1 ; alias from Sonic 1 (GitHub)
v_time = Timer ; alias from Sonic 1 (GitHub)
v_timemin = Timer_minute ; alias from Sonic 1 (GitHub)
v_timesec = Timer_second ; alias from Sonic 1 (GitHub)
v_timecent = Timer_frame ; alias from Sonic 1 (GitHub)