Scuba Dive: Memory map

Page	Byte	Address	Description
64	0	4000	Screen
91	0	5B00	Variables
91	77	5B4D	Data block at 5B4D
96	0	6000	Sprites
156	80	9C50	Data block at 9C50
156	86	9C56	Draw game screen
157	64	9D40	Calculate address in the mini-map (MiniMap table)
157	86	9D56	Calculate address in the mini-map (MiniMap table) and Get
157	95	9D5F	Check value in the mini-map (MiniMap table), if row and column in range 0..31
157	121	9D79	Calculate address in the mini-map (MiniMap table) and Set
157	132	9D84	Generate next pseudo-random 16-bit value
157	164	9DA4	Data block at 9DA4
157	165	9DA5	Fill block at HL with A
157	170	9DAA	Prepare the mini-map (MiniMap table)
159	129	9F81	Carve tunnel in world map: random-walk cave generator
160	59	A03B	Carve tunnel in world map: random-walk cave generator (rightward)
160	245	A0F5	Calculate address in relief block
161	41	A129	Calculate address in relief block and Get tile nummber
161	50	A132	Data block at A132
161	76	A14C	Get screen attribute address
161	100	A164	Convert char coords HL to ZX screen address
161	118	A176	Draw tile 16x8 at the screen
161	135	A187	Draw tile 8x8 at the screen
161	147	A193	Generate static object placements (chests, pearls/shells) across the map
162	126	A27E	Table of objects on the map; each record is 4 bytes wide
164	27	A41B	Data block at A41B
164	221	A4DD	Relief construction blocks, 8x8 tiles = 64x64 pixels
172	93	AC5D	Relief mini-map 32x32 = 1024 bytes
176	93	B05D	Data block at B05D
176	125	B07D	Table of objects on the screen
176	169	B0A9	Draw static objects on the screen; prepare LB07D table
177	108	B16C	Sprites for objects
177	212	B1D4	Select 8 random objects from the object pool
178	16	B210	Data block at B210
178	19	B213	Animate and draw rising air bubbles, plus Octopus
178	192	B2C0	Octopus delay and process
178	206	B2CE	Draw tile 8x8 with XOR
178	219	B2DB	Draw tile 16x8 with XOR
178	238	B2EE	Sprite 8x8 address, 8 bytes
178	246	B2F6	Sprite 16x16, 32 bytes; first lower part then upper
179	22	B316	Data block at B316
179	23	B317	Process Octopus, draw if needed
179	93	B35D	Draw Octopus sprite
179	146	B392	Unused?
179	160	B3A0	Insert or remove object from packed record list
180	112	B470	Draw object sprite, clipped to viewport
181	114	B572	Copy records forward
181	126	B57E	Remove first record: shift list backward by one slot
181	152	B598	Copy records backward
181	164	B5A4	Shift record block forward/backward by direction (Y axis)
181	224	B5E0	Clip object position to viewport, allocate/free screen slot
182	118	B676	Slot allocation bitmap, 16 slots, bit7 = slot used
182	134	B686	Screen attribute change for object edges (vertical and horizontal)
183	15	B70F	Screen attribute change for horizontally oriented object
183	55	B737	Update fish object: advance shift, draw, run moving procedure
183	185	B7B9	Data block at B7B9
183	187	B7BB	Update object: advance shift, draw, run moving procedure
184	54	B836	No-op moving procedure (empty stub)
184	55	B837	Screen attribute change for vertically oriented object
184	133	B885	Moving procedure for fish object moving horizontal
185	114	B972	Moving procedure for fish object moving vertical
186	100	BA64	Moving procedure for fish object moving diagonal
189	131	BD83	Set random speed and initial direction for spawned object
189	169	BDA9	Data block at BDA9
189	186	BDBA	Draw records for current mini-map row band
189	233	BDE9	Unused
189	234	BDEA	Update records for current mini-map row band, with delay
190	64	BE40	Process 26-byte records in group II
190	88	BE58	Process 26-byte records in group II
190	109	BE6D	Process 26-byte records in group III
190	133	BE85	Process 26-byte records in group III
190	154	BE9A	Process 21-byte records in group I: Boat, meduzas, round fishes
190	178	BEB2	Process 21-byte records in group I: Boat, meduzas, round fishes
190	199	BEC7	Reset slot allocation bitmap and buffer pointer
190	219	BEDB	Initialize level: place random objects (groups I-V), boat objects
191	160	BFA0	Data block at BFA0
191	176	BFB0	Spawn N objects of one type at random positions from template table
192	7	C007	Data block at C007
192	9	C009	Place N objects at random screen positions, avoiding the boat
192	146	C092	Object records
194	10	C20A	Record templates
196	49	C431	Update group IV and V object records (movement)
196	92	C45C	Draw group IV and V object records
196	129	C481	Object idle animation state machine (frame cycle + random wait)
196	213	C4D5	Delay loop (busy-wait via LDIR)
196	231	C4E7	Data block at C4E7
196	240	C4F0	Data block at C4F0
197	0	C500	Unused
217	144	D990	Game
218	57	DA39	Clear screen, fill attributes with A
218	89	DA59	Print char and shift current position right
218	152	DA98	Print string
218	173	DAAD	Prepare game screen and some variables
219	194	DBC2	Initialize variables depending of Game level
220	9	DC09	Texts for indicator panel
220	128	DC80	Tiles 8x8
221	240	DDF0	Blocks of 14 bytes to copy to 5B27, blocks aligned to 16 bytes
222	46	DE2E	Update gauge indicator on the screen
222	62	DE3E	Update Depth indicator
222	85	DE55	Data block at DE55
222	93	DE5D	Update Oxygen indicator, maximum is $FFFF
222	133	DE85	Print decimal number
222	217	DED9	Print high score number
222	229	DEE5	Print score number
222	241	DEF1	Print HELD number
222	253	DEFD	Data block at DEFD
223	37	DF25	Table: Angle 0..15 -> (DX, DY)
223	69	DF45	Data block at DF45
223	213	DFD5	Update diver position, angle and sprite from movement state
226	168	E2A8	Diver frame update: speed timer moves diver, input timer reads keys
226	219	E2DB	Read and process keyboard input
227	59	E33B	Diver object record
227	100	E364	Diver per-frame logic: oxygen drain, drowning, object interaction
228	27	E41B	Drowned diver: periodic 180-degree turn
228	58	E43A	Diver explosion
228	118	E476	Interact with object, like take Oxygen or pick up pearls
229	210	E5D2	DE = (L5B33) - HELD
229	224	E5E0	Dividers used to print decimal number, see PrintDec
229	236	E5EC	Play melody
230	4	E604	Melodies
230	21	E615	Play melody $E60B
230	28	E61C	Melodies
230	69	E645	Play melody $E629
230	82	E652	Sprites divers on the boat
230	130	E682	Draw Divers on the Boat
230	171	E6AB	Reset oxygen, draw divers on boat, position diver at dive start
231	103	E767	Diver on boat: idle, embark and disembark state machine
233	21	E915	Diver reaches boat: check collision, start climb sequence
233	176	E9B0	Plus one live
233	209	E9D1	Data block at E9D1
233	218	E9DA	Score table, 160 bytes
234	122	EA7A	Insert new high-score table entry if Score qualifies
234	222	EADE	Show Game Over screen and high-score table, prompt for name
235	130	EB82	Read player name for high-score entry (up to 6 chars)
235	219	EBDB	Print 16-bit number at TAB position (score table)
235	238	EBEE	Texts used for indicator panel
236	124	EC7C	Redefine keys
236	235	ECEB	Wait for keypress (with click sound), return key-row mask
237	35	ED23	UDG symbols $90..$93 used for Redefine keys
237	67	ED43	Text for Redefine keys
237	213	EDD5	Melody
237	223	EDDF	Starting point
238	28	EE1C	Main menu: wait for K/L/S/skill key, dispatch action
238	173	EEAD	Attract-mode demo: idle timeout starts animated level preview
239	58	EF3A	Data block at EF3A
239	127	EF7F	Message at EF7F
239	147	EF93	Message at EF93
239	166	EFA6	Unused
240	0	F000	Draw buffer