Scuba Dive: Routines

Address	Description
9C56	Draw game screen
9D40	Calculate address in the mini-map (MiniMap table)
9D56	Calculate address in the mini-map (MiniMap table) and Get
9D5F	Check value in the mini-map (MiniMap table), if row and column in range 0..31
9D79	Calculate address in the mini-map (MiniMap table) and Set
9D84	Generate next pseudo-random 16-bit value
9DA5	Fill block at HL with A
9DAA	Prepare the mini-map (MiniMap table)
9F81	Carve tunnel in world map: random-walk cave generator
A03B	Carve tunnel in world map: random-walk cave generator (rightward)
A0F5	Calculate address in relief block
A129	Calculate address in relief block and Get tile nummber
A14C	Get screen attribute address
A164	Convert char coords HL to ZX screen address
A176	Draw tile 16x8 at the screen
A187	Draw tile 8x8 at the screen
A193	Generate static object placements (chests, pearls/shells) across the map
B0A9	Draw static objects on the screen; prepare LB07D table
B1D4	Select 8 random objects from the object pool
B213	Animate and draw rising air bubbles, plus Octopus
B2C0	Octopus delay and process
B2CE	Draw tile 8x8 with XOR
B2DB	Draw tile 16x8 with XOR
B317	Process Octopus, draw if needed
B35D	Draw Octopus sprite
B3A0	Insert or remove object from packed record list
B470	Draw object sprite, clipped to viewport
B572	Copy records forward
B57E	Remove first record: shift list backward by one slot
B598	Copy records backward
B5A4	Shift record block forward/backward by direction (Y axis)
B5E0	Clip object position to viewport, allocate/free screen slot
B686	Screen attribute change for object edges (vertical and horizontal)
B70F	Screen attribute change for horizontally oriented object
B737	Update fish object: advance shift, draw, run moving procedure
B7BB	Update object: advance shift, draw, run moving procedure
B836	No-op moving procedure (empty stub)
B837	Screen attribute change for vertically oriented object
B885	Moving procedure for fish object moving horizontal
B972	Moving procedure for fish object moving vertical
BA64	Moving procedure for fish object moving diagonal
BD83	Set random speed and initial direction for spawned object
BDBA	Draw records for current mini-map row band
BDEA	Update records for current mini-map row band, with delay
BE40	Process 26-byte records in group II
BE58	Process 26-byte records in group II
BE6D	Process 26-byte records in group III
BE85	Process 26-byte records in group III
BE9A	Process 21-byte records in group I: Boat, meduzas, round fishes
BEB2	Process 21-byte records in group I: Boat, meduzas, round fishes
BEC7	Reset slot allocation bitmap and buffer pointer
BEDB	Initialize level: place random objects (groups I-V), boat objects
BFB0	Spawn N objects of one type at random positions from template table
C009	Place N objects at random screen positions, avoiding the boat
C431	Update group IV and V object records (movement)
C45C	Draw group IV and V object records
C481	Object idle animation state machine (frame cycle + random wait)
C4D5	Delay loop (busy-wait via LDIR)
D990	Game
DA39	Clear screen, fill attributes with A
DA59	Print char and shift current position right
DA98	Print string
DAAD	Prepare game screen and some variables
DBC2	Initialize variables depending of Game level
DE2E	Update gauge indicator on the screen
DE3E	Update Depth indicator
DE5D	Update Oxygen indicator, maximum is $FFFF
DE85	Print decimal number
DED9	Print high score number
DEE5	Print score number
DEF1	Print HELD number
DFD5	Update diver position, angle and sprite from movement state
E2A8	Diver frame update: speed timer moves diver, input timer reads keys
E2DB	Read and process keyboard input
E364	Diver per-frame logic: oxygen drain, drowning, object interaction
E41B	Drowned diver: periodic 180-degree turn
E43A	Diver explosion
E476	Interact with object, like take Oxygen or pick up pearls
E5D2	DE = (L5B33) - HELD
E5EC	Play melody
E615	Play melody $E60B
E645	Play melody $E629
E682	Draw Divers on the Boat
E6AB	Reset oxygen, draw divers on boat, position diver at dive start
E767	Diver on boat: idle, embark and disembark state machine
E915	Diver reaches boat: check collision, start climb sequence
E9B0	Plus one live
EA7A	Insert new high-score table entry if Score qualifies
EADE	Show Game Over screen and high-score table, prompt for name
EB82	Read player name for high-score entry (up to 6 chars)
EBDB	Print 16-bit number at TAB position (score table)
EC7C	Redefine keys
ECEB	Wait for keypress (with click sound), return key-row mask
EDDF	Starting point
EE1C	Main menu: wait for K/L/S/skill key, dispatch action
EEAD	Attract-mode demo: idle timeout starts animated level preview