Memory map

Address	Length	Description
23820	64	Game loader - load game code and set execution starting address
23884	1117	Unused
25001	1383	Room data - standard rooms
26384	128	Room data - vertical tunnel sections
26512	1020	Room data - connecting doors
27532	240	Room data - creatures
27772	96	Warlock and other creatures - stats and attributes
27868	72	Missile data
27940	216	Graphics - character set A-Z
28156	448	Spells list
28604	438	Spell text messages
29042	164	Level names
29206	227	Level ranks
29433	90	Game completion and start messages
29523	28	Save game message
29551	2149	Room objects
31700	44	Unidentified code (unused)
31744	3	Launch the initial game menus
31747	170	Draw decorative screen border graphics
31917	372	Draw game screen decorative border (colours)
32289	260	Draw the inner border for the intro sequence
32549	276	Draw the intro sequence landscape
32825	104	Menu 1: Print control options
32929	32	Menu 1: Scan keyboard input for control option selection
32961	60	Menu 1: Highlight/store selected control option (1-4)
33021	30	Menu 1: Check if ENTER pressed to confirm player controls
33051	18	Menu 2: Print the menu
33069	46	Menu 2: Check for ENTER or LOAD keys being pressed
33115	30	Clear the menu screen
33145	65	Menu text PRINT routine
33210	57	Unused colour/attribute fill routine
33267	52	Drawing routine (decorative border and intro sequence background)
33319	56	Drawing routine used for intro sequence graphics
33375	443	Graphics: Intro sequence inner border & backdrop
33818	1936	Graphics: Game screen (decorative border)
35754	24	Menu screens - data store
35778	216	First menu screen text
35994	51	Second menu screen text
36045	21	Load saved game text
36066	2785	Unused
38851	370	Data - sprite and graphic address pointer table
39221	26	Unused
39247	897	Graphics - Maroc the Mage
40144	248	Graphics - Doors
40392	123	Graphics - Wall/floor connector sections
40515	165	Graphics - Door frames
40680	91	Graphics - Brickwork graphics
40771	105	Graphics - Wall/floor connector sections 2
40876	137	Graphics - Door frames 2
41013	101	Graphics - Cavern back wall background graphics
41114	65	Graphics - Tunnels
41179	41	Graphics - Servant
41220	60	Graphics - Eye cursor
41280	36	Graphics - Scroll
41316	26	Graphics - Caliburn
41342	125	Graphics - Spell icons
41467	240	Graphics - Missiles & bolts
41707	214	Graphics - Warlock
41921	219	Graphics - Guardian of Chaos
42140	177	Graphics - Goblin warrior
42317	211	Graphics - Goblin missile thrower
42528	174	Graphics - Wraith
42702	377	Graphics - Demon
43079	144	Graphics - Warlock/demon materialization effect
43223	271	Graphics - Disintegration animation
43494	116	Graphics - Shield spell barrier
43610	53	Graphics - Foreground scenery - skeleton
43663	259	Graphics - Foreground scenery items 1
43922	122	Graphics - Foreground scenery items 2
44044	237	Graphics - Foreground scenery items 3
44281	142	Graphics - Foreground scenery items 4
44423	20	Graphics - Maroc's shadow
44443	6	Graphics - 'Dummy' graphic
44449	139	Graphics - Spider
44588	186	Graphics - Bat
44774	13	Graphics - Scroll display icon for spell charges
44787	178	Graphics - Energy bar (on scroll)
44965	74	Graphics - Scroll pointer arrow
45039	81	Graphics - Key and Chest
45120	66	Graphics - Buried bottle and Lever
45186	59	Graphics - Cheese & Mouse Hole
45245	59	Graphics - Keys (key 2 and hanging key)
45304	53	Graphics - Star
45357	105	Graphics - Various
45462	73	Graphics - Scorpion
45535	126	Graphics - Axe, Bone, Orb, Sabre
45661	41	Graphics - Mouse
45702	49	Graphics - Sabre - animated
45751	116	Graphics - Trapdoor
45867	48	Graphics - Lady
45915	111	Graphics - Key 3, Oil Jar, Gem, Idol
46026	79	Graphics - Fire
46105	150	Graphics - Elemental Symbols
46255	18	Graphics - Pick Axe
46273	120	Graphics - Portal Floor Symbol and Door
46393	44	Graphics - Avelach, Lord of Chaos
46437	64	Graphics - Elemental Symbol (blank) and Healing Star
46501	2419	Unused
48920	2	Controls choice and game flag
48922	25	Initialize game
48947	45	Load saved game
48992	61	Start game
49053	162	New game initialization - set up game data
49215	59	Run new game intro sequence
49274	31	Intro sequence lightning - flashing & sound effects
49305	10	Intro sequence - move Maroc's sprite down one pixel
49315	30	Maroc out of energy - clear scroll, calculate & print rank
49345	70	Place/replace Maroc in the start room
49415	83	Reset various room-based game data ready for a new room
49498	102	Room initialization - identify room data set and scenery style, reset room/viewport position
49600	32	Set up LEFT vertical wall/floor connector graphics
49632	47	Set up room background scenery - part 1
49679	86	Set up room background scenery - part 2
49765	43	Check for and set up back wall brickwork/rock scenery
49808	50	Set up room floor-wall connector graphics
49858	54	Calculate horizontal/vertical room co-ordinates for each room section/components
49912	53	Set up RIGHT vertical wall/floor connector graphics
49965	28	Check room item data sets to see if any doors need setting up
49993	225	New room - door setup
50218	54	Identify room's interactable objects
50272	161	Set up the room's creatures
50433	112	Set up room foreground scenery objects - part 1
50545	68	Adjust room element co-ordinates based on Maroc's room entry point
50613	50	Tunnel room - identify the connecting door set
50663	49	Set up tunnel
50712	35	Start of tunnel data setup
50747	60	Calculate and set current room attribute colours
50807	45	Identify and set up level name for printing on scroll
50852	18	Lookup table - room numbers and their corresponding level names & warlocks
50870	162	Start of game cycle - control checks
51032	11	Pause game routine - check if 'pause' key pressed
51043	55	Pause game routine - play tune and check user input
51098	43	Pause game routine - save the current game
51141	11	Pause game routine - check if 'resume game' key is pressed
51152	26	Start of main game loop
51178	77	Copy current room item data set into working buffer
51255	104	Adjust room item's position based on the speed and direction of Maroc and the item
51359	61	Deal with and check room item, creature or scenery
51420	131	Determine if creatures will enter the current room
51551	60	Check which creatures are entering the room
51611	91	Check for an on-screen door being opened or closed
51702	111	Check if Maroc is moving through an open doorway
51813	41	Maroc is moving through a doorway
51854	38	Trigger door opening or closing
51892	76	Door opening or closing
51968	76	Set up 'interactable' objects in current room
52044	15	Servant has dropped a held item
52059	59	Handle interactable objects that are falling/flying
52118	18	Check if servant has moved away from Maroc after retrieving an item
52136	127	Determine movement of room items/creatures that move around the screen
52263	75	Check and change object state after positive events match/collision
52338	54	Check if Maroc has picked up (or been given) a spell or item
52392	53	Maroc has picked up a spell
52445	68	Maroc has picked up an item
52513	69	Check for an object trade with warlock
52582	34	Check for servant picking up an object
52616	79	Deal with creature in room - create footstep sounds and check for missile collisions
52695	154	Change creature behaviour based on Maroc's magic
52849	64	Maroc is trading items with a warlock
52913	35	Maroc has offered an object of insufficient value to a warlock
52948	55	Decide whether a warlock will fire a missile/bolt at Maroc
53003	51	UNSEEN spell effect on creature movement
53054	26	Goblin warrior - check if movement is affected by Maroc's magic power
53080	65	Initialize missile/bolt fired by a creature
53145	128	Warlock or creature - materialization & disintegration events
53273	50	Warlock - drop carried object
53323	26	Creature collision check with room boundary and Maroc
53349	23	Creature has collided with Maroc
53372	31	Maroc has destroyed a creature - initialise disintegration
53403	81	Missile fired by Maroc or a creature - check for active shield/barrier spells
53484	42	Creature's missile has hit Maroc's shield/barrier
53526	24	Check if a missile fired by a creature has hit Maroc, and if so reduce his energy
53550	51	Check missile room boundary collisions and on-screen lifespan
53601	24	Copy co-ordinates of room's left/right wall connector sections to working buffer
53625	89	Tunnel position & direction
53714	45	Check tunnel item type for collision checks and movement (boundary, bats and spiders)
53759	28	BAT movement in tunnel section
53787	32	Tunnel item (boundary or bat/spider) has gone off-screen - reduce on-screen item count
53819	51	Tunnels - check if Maroc has hit a left/right boundary wall
53870	15	Start of setting up room routine
53885	168	Drawing checks and routines for all on-screen room items
54053	12	Start of setting up room routine - part 2
54065	55	Flash the 'MAGIC' text in the bottom left (if Maroc has picked up a spell) and trigger sound effect
54120	222	Determine Maroc's sprite graphic position, height and direction
54342	51	Draw Maroc's sprite graphic
54393	36	Check if Maroc is on a room element/item that drains or restores his energy
54429	21	Check if Maroc has gone through the portal in room 81
54450	74	Draw Maroc's shadow and flickering barrier for SHIELD, PROTECT and DEFENCE spells
54524	216	Move and draw the room's foreground scenery items
54740	42	Re-calculate room event table data sets
54782	60	Prepare data for any creatures that are entering Maroc's room
54842	23	Gradual energy drain/restore for Maroc's ongoing effect spells
54865	42	Determine whether a warlock should materialize in the room
54907	41	Prepare a warlock to appear in the room
54948	12	Generate a DEMON in the room in the High Temple of Chaos
54960	23	Initialize the appearance of a warlock or a demon
54983	11	Copy creature, demon or warlock data to room data sets
54994	74	Tunnel section - Generate and prepare tunnel items
55068	20	Tunnel section - Run game timer and randomly generate creatures
55088	100	Tunnel section - Generate a SPIDER or BAT encounter
55188	95	Check for any fired missiles/bolts
55283	64	Check which spell has been cast
55347	127	SERVANT spell - check for retrieval of object from Maroc's backpack
55474	28	Set up active spell-based room event checks
55502	51	HAIL, WAYSTONE, FREEZE, SUMMON or PORTAL spell cast
55553	11	Check/decrement the FREEZE spell timer counter if active
55564	52	Check if Maroc is carrying too many objects
55616	12	Check if Maroc is out of energy
55628	190	Deal with room items when Maroc leaves the room
55818	67	Maroc's room number has changed - identify new room number
55885	59	Maroc is out of energy
55944	64	Game completion - Maroc has destroyed Avelach, Lord of Chaos
56008	20	Object - vertical room position check/adjustment
56028	18	Fetch object state and prepare graphics for printing
56046	11	Store for base address pointers
56057	13	Unused
56070	25	Generate pseudo-random number using ROM address values
56095	121	Set up missile data and calculate trajectory
56216	93	Draw/erase graphics - screen boundary checks
56309	76	Draw/erase graphics - calculate screen display address position
56385	11	Draw/erase graphics - erase graphic bytes
56396	7	Draw/erase graphics - draw graphic bytes
56403	36	Draw/erase graphics - re-calculate screen display address 1 pixel line down
56439	18	Draw/erase graphics - graphic tile out of bounds
56457	76	Draw/erase graphics - graphic partly out of bounds - RIGHT border of play area
56533	79	Draw/erase graphics - graphic partly out of bounds - LEFT border of play area
56612	56	Draw the spell pointer arrow, spell charge icons and energy bar on the scroll
56668	34	Print the active spell's message text
56702	35	Set length of Maroc's energy bar based on his current energy level
56737	171	Draw/erase foreground scenery items
56908	51	Identify objects for current room
56959	56	Identify state of object in current room
57015	66	Create data set for interactable room object and copy item/graphic data into it
57081	58	Clear the scroll status panel at the bottom of the screen
57139	137	Print spell names on the scroll
57276	17	Calculate servant/icon cursor graphic horizontal/vertical direction & speed
57293	108	Check for events/collisions
57401	119	Check if Maroc or room item is within room boundaries
57520	18	Copy room item data from item buffer to room data sets
57538	51	Setup game graphics
57589	117	Create flipped/mirrored version of a particular graphic
57706	109	Set up data for creature/warlock appearing in Maroc's room
57815	48	Play (generic) sound effect
57863	25	Set screen colour for current room
57888	59	Set attribute colours for Maroc
57947	43	Clear the playing area (pixels)
57990	42	Collision check between creature missile and Maroc's shielding barrier
58032	32	Copy room item event data into working buffer
58064	42	Set up message text on scroll to print
58106	60	Character/text printing
58166	150	Handle creature/graphic animation
58316	49	Increase/decrease Maroc's energy and play short beep sound
58365	111	Print screen colours for room object/creature
58476	123	Animation routine for when Maroc is out of energy
58599	165	Calculate and print Maroc's rank
58764	25	Clear the spell message text area on the scroll
58789	17	Identify address of message text
58806	72	Play music
58878	18	Generate sound effect when Maroc picks up a scroll/spell/item
58896	49	Intro sequence - toggle sky colour between blue/yellow
58945	88	Main loop - handle spell menu and keyboard/joystick inputs
59033	97	UP/DOWN controls pressed while in spell menu
59130	89	Draw active spell charges and icon on scroll
59219	43	Write active spell message on scroll and draw energy bar
59262	36	Check for UP/DOWN and FIRE control presses after a spell is selected
59298	32	Player has cast a spell
59330	43	Print name of ongoing effect spell in small scroll in bottom right of screen
59373	16	Set FLASHing attributes for the spell icon in the top right of the scroll
59389	85	Check which spell is being cast
59474	14	Check horizontal movement direction & speed (MOVE spell)
59488	32	Increase Maroc's horizonal movement speed
59520	21	Decrease Maroc's horizontal movement speed
59541	11	Check vertical movement direction & speed (MOVE spell)
59552	32	Increase Maroc's vertical movement speed
59584	21	Decrease Maroc's vertical movement speed
59605	25	Set Maroc's speed to zero if FIRE pressed while he is moving
59630	59	MOVE spell continued - set viewport scenery speed/movement based on Maroc's
59689	47	Player has cast a spell requiring a controllable cursor (e.g. SERVANT, MISSILE, OPEN)
59736	47	Calculate change to servant/cursor icon horizontal screen position
59783	86	Calculate change to servant/cursor icon vertical screen position
59869	64	Check if FIRE pressed when servant or controllable spell cursor is on screen
59933	23	Spell selected that is the same as the active 'effect' spell (e.g. SHIELD, UNSEEN)
59956	109	Deactivate the currently active effect spell
60065	6	Data buffer - scroll text and icon data
60071	3	Data buffer - attributes/colours
60074	33	Data buffer - game data (various)
60107	22	Data buffer - graphic working data
60129	14	Data buffer - spell data
60143	14	Data buffer - general (mainly room/scenery related)
60157	9	Data buffer - Maroc/servant/spell cursor controls and position data
60166	61	Keyboard/joystick control method and port checking values
60227	16	Data buffer - for each room object, creature, scenery item
60243	8	Data buffer - music and sound effects
60251	25	Data buffer - general address and spell pointers
60276	14	Data buffer - room co-ordinate data and pointers
60290	15	Data buffer - room objects
60305	20	Data buffer - missile data
60325	8	Data buffer - creature attributes
60333	13	Game data buffer - warlock and creature attributes/data
60346	7	Data buffer - Maroc's inventory address pointers
60353	4	Missile & creature data pointers for start of game
60357	17	Store for currently selected spell data
60374	26	Room item/creature attribute colour patterns
60400	164	Music data
60564	14	Data buffer - various bits of spell and tunnel data
60578	22	Unused
60600	1346	Code sheet - full code sheet data values
61946	28	Code sheet - get the code that the player needs to enter
61974	8	Code sheet - bytes used to randomize code sheet co-ordinates choice
61982	66	Code sheet - hash/randomize the security code co-ordinates required for input
62048	2	Code sheet - store for code value co-ordinates (for code sheet)
62050	6	Unused
62056	12	Code sheet - print code message/character on screen
62068	21	Code sheet - pick a reference co-ordinate for the code that the player has to enter
62089	13	Code sheet - generate 3 random bytes using the FRAMES timer system variable
62102	99	Code sheet - initialize and print security code to enter
62201	82	Code sheet - set up and evaluate player code input
62283	5	Code sheet - set random number seed to generate the random code location address
62288	73	Code sheet - code entry count and validation
62361	1639	Unused
64000	1000	Unused
65000	60	Unencrypt all LOADed game data
65060	476	Unused