Memory map

Page	Byte	Address	Description
64	0	4000	Loading screen
91	0	5B00	Unused
91	91	5B5B	IM2 vector jump
91	94	5B5E	Unused
92	118	5C76	Pseudo-random store for crushers
92	120	5C78	Unused
92	123	5C7B	Current x co-ordinate
92	124	5C7C	Current y co-ordinate
92	125	5C7D	Abide With Me tune data
92	225	5CE1	Game won message
95	67	5F43	Hidden message
96	0	6000	Bucket
96	128	6080	Miner
97	128	6180	Dog
98	0	6200	Squirrel L
98	128	6280	Squirrel R
99	0	6300	Nut
99	128	6380	Police helmet alien thingy
100	0	6400	Candle
100	128	6480	Bat
101	0	6500	No smoking sign
101	128	6580	Arthur L
102	0	6600	Arthur R
102	128	6680	Aerosol L
103	0	6700	Aerosol R
103	128	6780	Lightbulb
104	0	6800	Jawed critter L
104	128	6880	Jawed critter R
105	0	6900	Star
105	128	6980	Grumpy face
106	0	6A00	Miner's helmet
106	128	6A80	Worried face
107	0	6B00	Snake
107	128	6B80	Ghost L
108	0	6C00	Ghost R
108	128	6C80	Genie L
109	0	6D00	Genie R
109	128	6D80	Waterfall
110	0	6E00	Bee
110	128	6E80	Rock
111	0	6F00	Brick
111	128	6F80	Minecart
112	0	7000	Tipping minecart
112	128	7080	Flying fish (12 frames)
114	0	7200	Shark (16 frames)
118	0	7600	Devil
118	128	7680	Tap
119	0	7700	Pull chain
119	128	7780	(empty)
120	0	7800	Monty up
121	0	7900	Monty climbing
122	0	7A00	Hammer
122	32	7A20	Drill
122	64	7A40	Pick
122	96	7A60	Scroll
122	128	7A80	Axe
122	160	7AA0	Detenator
122	192	7AC0	Dynamite
122	224	7AE0	Stick
123	0	7B00	Club
123	32	7B20	Shovel
123	64	7B40	Bucket
123	96	7B60	Spade
123	128	7B80	Scissors
123	160	7BA0	Key
123	192	7BC0	Shower head
123	224	7BE0	Plant
124	0	7C00	Start room graphics
128	0	8000	Display input options and wait to start
128	105	8069	Toggle the display on every interrupt so the selected option is flashing
128	138	808A	Blank a character on screen
128	146	8092	Print an option on the intro screen
128	209	80D1	Print a character on screen
128	255	80FF	Put a text character's attributes on screen
129	34	8122	Intro string data (5 lines)
129	59	813B	Character set
130	107	826B	Intro string text
130	163	82A3	Game input : 0 - keyboard, 1 - Kempston, 2 - Sinclair
130	164	82A4	Frame counter for input options
130	165	82A5	Set to 0 to print an option, or 1 to hide it
130	166	82A6	Check for player input
131	46	832E	Last input data
131	47	832F	Unused
131	149	8395	Select the graphic for Monty
131	173	83AD	Unused
131	181	83B5	Unused
132	82	8452	Redraw Monty after jumping or falling
132	140	848C	Last address of Monty graphic
132	142	848E	Current frame to draw Monty
132	143	848F	Position off the ground (when jumping)
132	144	8490	Unused
132	146	8492	Pointer to current movement flags
132	148	8494	Current pitch to use when making a jump sound
132	150	8496	Default pitch to use when maing a jump sound
132	152	8498	Time Monty has been jumping
132	153	8499	Temporary storage for redrawing when jumping or falling
132	155	849B	Last input data when jumping or falling
132	156	849C	Monty up
133	28	851C	Monty up (alt)
133	156	859C	Monty left
134	28	861C	Monty right
134	156	869C	Movement table for jumping
134	188	86BC	Unused
135	14	870E	Unused
135	29	871D	Unused
135	47	872F	Unused
135	78	874E	Unused
135	81	8751	Move all the nasties on the screen
136	102	8866	Draw the nasty's attributes
136	125	887D	Draw a type 1 - 3 nasty
136	130	8882	Unused
136	244	88F4	Unused
137	96	8960	Unused
137	98	8962	X co-ordinate for current nasty being drawn
137	99	8963	Y co-ordinate for current nasty being drawn
137	100	8964	Update a type 2 (single direction) nasty
137	212	89D4	Update Monty's position
138	99	8A63	Make Monty jump
138	196	8AC4	Unused
138	211	8AD3	Update Monty while jumping
139	12	8B0C	See if Monty has walked off a ladder, and if so, set some flags
139	31	8B1F	Update Monty and act on room flags
139	144	8B90	Determine where Monty can move to
140	61	8C3D	Check what attributes are around Monty
141	15	8D0F	Update the movement tables (across)
141	46	8D2E	Update the movement tables (down)
141	82	8D52	Room flags
141	83	8D53	Game flags
141	84	8D54	Movement flags
141	88	8D58	Distance fallen by
141	89	8D59	Current attribute address of Monty
141	91	8D5B	Y screen offset for attribute
141	92	8D5C	X screen offset for attribute
141	93	8D5D	X co-ordinate on screen
141	94	8D5E	Y co-ordinate on screen
141	95	8D5F	Return the current screen address
141	125	8D7D	Temp store for screen position
141	127	8D7F	Play death tune
141	205	8DCD	Move a crusher
142	122	8E7A	Crusher graphic
142	154	8E9A
142	155	8E9B	Set the attributes for a crusher
142	221	8EDD	Animate Monty's angel as he has died
143	49	8F31	Update the moving platforms
143	159	8F9F	IM2 routine for main game
144	82	9052	Update one side of a moving platform
144	163	90A3	Update one byte of a moving platform
144	168	90A8	Animate water
144	189	90BD	Animate the shower water in room 11
145	11	910B	Graphic buffer for shower water in room 11
145	43	912B	Graphic index for shower in room 11
145	44	912C	Animate the shower water in room 11 (2)
145	72	9148	Check that a crusher has killed Monty
145	119	9177	Offset for Monty's angel as it is animated
145	121	9179	Frame number for the angel (0-3)
145	122	917A	Make Monty climb a ladder
145	157	919D	Add value of coal to the current score
145	232	91E8	Print the score
146	18	9212	Score position data
146	23	9217	Current score (in reverse digits)
146	28	921C	"SCORE: "
146	35	9223	Current score (in text).
146	40	9228	Check to see if Monty has collided with a nasty
146	88	9258	See if Monty is touching some coal and can collect it
146	126	927E	Check if Monty is touching a (non-coal) collectable item, and if so, pick it up
146	152	9298	Check if Monty has collided with a nasty that can be removed with an item
147	39	9327	Return IX pointing to the index of the nasty Monty is touching, or 0
147	92	935C	Check to see if Monty has moved near any coal, and if so, pick it up
148	12	940C	Enter a room
148	110	946E	Monty has died. Play the "death" tune and lose a life
148	158	949E	Print the number of lives on the screen
148	182	94B6	Lives display position
148	187	94BB	Lives display text
148	195	94C3	Copy the data for the current room into the working buffer
148	217	94D9	Move into a new room
149	47	952F	Put (non coal) collectable objects on screen
149	81	9551	Display the current room
149	104	9568	Pick up an item
149	174	95AE	Reset the index of the collectable item, as it was picked up
149	179	95B3	Animate the coal colours in the room
149	232	95E8	Animate an item of coal in a room.
150	15	960F	Draw the coal in the room
150	67	9643	Unused
150	71	9647	Storage block for calculating coal pickups
150	73	9649	Current room
150	74	964A	Number of lives
150	75	964B	Start position for this room (when a life is lost)
150	77	964D	Array of points given for each 'nth' coal item
150	141	968D	Clear a non-coal item, as it has been collected
150	170	96AA	Refresh any coal in the room.
150	209	96D1	Temporary space for coal data
150	217	96D9	Animate the rolling minecart in room 10
151	151	9797	X co-ordinate of the minecart in room 10
151	152	9798	Y co-ordinate of the minecart in room 10
151	153	9799	Unused
151	155	979B	Monty rolling (not used)
152	27	981B	Unused
154	42	9A2A	Room 00
156	42	9C2A	Room 01
158	42	9E2A	Room 02
160	42	A02A	Room 03
162	42	A22A	Room 04
164	42	A42A	Room 05
166	42	A62A	Room 06
168	42	A82A	Room 07
170	42	AA2A	Room 08
172	42	AC2A	Room 09
174	42	AE2A	Room 0A
176	42	B02A	Room 0B
178	42	B22A	Room 0C
180	42	B42A	Room 0D
182	42	B62A	Room 0E
184	42	B82A	Room 0F
186	42	BA2A	Room 10
188	42	BC2A	Room 11
190	42	BE2A	Room 12
192	42	C02A	Room 13
194	42	C22A	Room 14
196	42	C42A	Static characters on screen
197	26	C51A	"Water" attribute
197	27	C51B	"Fire" attribute
197	28	C51C	"Ladder" attribute
197	29	C51D	"Wall" attribute
197	30	C51E	Offset for Monty's graphic
197	32	C520	Next room UP
197	33	C521	Next room DOWN
197	34	C522	Next room LEFT
197	35	C523	Next room RIGHT
197	36	C524	x co-ordinate of (non coal) collectable item
197	37	C525	y co-ordinate of (non coal) collectable item
197	38	C526	Graphic index of (non coal) collectable item
197	39	C527	x co-ordinate of crusher
197	40	C528	y co-ordinate of crusher
197	41	C529	Crusher bottom column
197	42	C52A	Ticks left until a crusher should fire
197	43	C52B	Set to 0 if a crusher is ascending, or 1 if it is descending
197	44	C52C	Crusher top column
197	45	C52D	Unused
197	55	C537	Coal UDG
197	63	C53F	Positions of coal in the room
197	78	C54E	Static character graphics
197	150	C596	Nasty data
198	34	C622	Moving platform 1 left x co-ordinate
198	35	C623	Moving platform 1 left y co-ordinate
198	36	C624	Moving platform left edge
198	37	C625	Moving platform right edge
198	38	C626	Moving platform 2 right x co-ordinate
198	39	C627	Moving platform 2 right y co-ordinate
198	40	C628	Set bit 7 if the platform is closing, otherwise reset if it is opening
198	41	C629	Unused
198	42	C62A	Copy the room graphic buffer to screen so it is visible
198	65	C641	Unused
199	0	C700	Vector jump table
200	0	C800	Unused
200	80	C850	Unused
200	138	C88A	Unused
202	56	CA38	Unused
202	57	CA39	Unused
202	209	CAD1	Display the "game won" sequence
203	3	CB03	Print a message
203	21	CB15	Scroll a line of the message
203	53	CB35	Print a character in a message
203	99	CB63	Move a line of a message upwards
203	145	CB91	Column to print the next character in a message.
203	146	CB92	Timer used when scrolling the end message
203	147	CB93	Run one frame in the first (outdoor) room
205	38	CD26	Convert a sprite ID to a graphic offset
205	50	CD32	Set to 0 if the bucket has been collected, or 1 if not
205	51	CD33	Timer for animating bucket
205	52	CD34	Animation frame for bucket
205	53	CD35	X co-ordinate of the miner
205	54	CD36	Animation frame for miner
205	55	CD37	Timer for animating miner
205	56	CD38	Squirrel direction
205	57	CD39	X co-ordinate of the squirrel
205	58	CD3A	Timer for animating squirrel
205	59	CD3B	Animation frame for the squirrel
205	60	CD3C	Set to 1 if the squirrel is dropping a nut
205	61	CD3D	Set to 0 if the nut is still falling, or 4F if it is exploding
205	62	CD3E	Current screen position of the nut dropped by the squirrel
205	63	CD3F	Timer for animating nut
205	64	CD40	Animation frame for nut
205	65	CD41	Display the first (outdoor) room
205	196	CDC4	Monty has grabbed the bucket - start the miner chase
205	239	CDEF	Interrupt routine for first room
206	25	CE19	Frame counter (when zero, background animation happens)
206	27	CE1B	Unused
206	204	CECC	Unused
206	205	CECD	Unused
206	239	CEEF	Unused
207	44	CF2C	Unused
207	84	CF54	Screen attribute buffer
210	84	D254	Copy the screen to storage buffer
210	96	D260	Save game to tape
210	144	D290	Main entry point
210	233	D2E9	Unused
213	185	D5B9	Colonel Bogey tune data
218	1	DA01	Unused
234	96	EA60	Offsets from character to relative screen positions
235	224	EBE0	Print an animinated object on screen
236	101	EC65	Unused
236	111	EC6F	Shift a sprite to the right and copy it into a working buffer
236	162	ECA2	Shift a sprite to the left and copy it into a working buffer
236	220	ECDC	Frame number of the next sprite to update
236	221	ECDD	Unused
236	222	ECDE	X co-ordinate of next sprite to update
236	223	ECDF	Y co-ordinate of next sprite to update
236	224	ECE0	Address of next sprite to update
236	226	ECE2	Pointer to position on screen to update
236	228	ECE4	Working buffer for moving sprites
237	22	ED16	Unused
237	46	ED2E	Unused
237	78	ED4E	Chimney smoke for start room
239	46	EF2E	Animate the smoke in the start room
239	107	EF6B	Initialize smoke animation in the start room
239	119	EF77	Pointer to smoke animation graphic
239	121	EF79	Frame number for smoke animation graphic
239	122	EF7A	Screen offset address to draw the smoke animation graphic
239	124	EF7C	Unused
239	126	EF7E	Set up graphics for the start room
239	189	EFBD	Draw static UDGs on the start room
240	65	F041	Pointer to start room data
240	67	F043	Pointer to start room UDGs
240	69	F045	Current position drawing the start room
240	71	F047	Address of UDG currently being printed in the start room
240	73	F049	Screen position to draw the next UDG in the start room
240	75	F04B	End message
240	251	F0FB	Unused
241	53	F135	Unused
241	75	F14B	Pointer to start room UDG data
241	77	F14D	UDGs for start room
243	125	F37D	Attributes for start room
245	173	F5AD	Unused
246	77	F64D	See if Monty has picked up enough coal to open a blocking wall
246	166	F6A6	Hide any blocking walls if sufficient coal has been picked up
246	253	F6FD	Erase a wall from the screen
247	26	F71A	Hide a wall after enough coal has been collected
247	136	F788	Unused
247	199	F7C7	Perform interrupt handler background updates
247	209	F7D1	Flags to indicate which blocking walls can open
247	210	F7D2	Y co-ordinate for the disappearing wall
247	211	F7D3	X co-ordinate for the disappearing wall
247	212	F7D4	Timer state for the disappearing wall
247	213	F7D5	Number of pieces of coal that have been collected
247	214	F7D6	Start a new game
248	23	F817	Print the "game over" message and start a new game
248	88	F858	Print the "game won" message and start a new game
248	108	F86C	Unused
250	38	FA26	Unused
250	51	FA33	Unused
250	64	FA40	Unused
250	77	FA4D	Unused
250	103	FA67	Unused
250	119	FA77	Unused
250	191	FABF	Unused
250	238	FAEE	Unused
251	13	FB0D	Unused
251	46	FB2E	Unused
251	62	FB3E	Unused
251	158	FB9E	Unused
251	180	FBB4	Unused
251	237	FBED	Fill a sprite with an attribute
251	252	FBFC	Fill three rows with an attribute
252	24	FC18	Convert a co-ordinate to an attribute address.
252	60	FC3C	Unused
252	106	FC6A	Unused
252	153	FC99	Unused
252	180	FCB4	Unused
252	219	FCDB	Unused
252	243	FCF3	Unused
253	123	FD7B	Unused
253	155	FD9B	Generate a random time for the crusher
253	185	FDB9	Unused
253	213	FDD5	Print all static characters in the current room
253	234	FDEA	Print a line of characters in a room
254	65	FE41	Print a character in the room
254	134	FE86	Unused
254	143	FE8F	Convert a screen address to a buffer address and store it
254	152	FE98	Unused
254	162	FEA2	Check the attribute at the current position matches the "moving" type
254	192	FEC0	Get the attribute at the specified position
254	231	FEE7	Unused
255	0	FF00	Set control option and reset IY
255	8	FF08	Unused
255	91	FF5B	Halt and run one frame in the first (outdoor) room
255	96	FF60	Monty's angel
255	224	FFE0	Dead Monty