Alien (BUGFIX 1.7): Memory map

Page	Byte	Address	Description
64	0	16384	Loading screen — display file and attributes
91	0	23296	Boot-time residue: printer buffer and system variables
92	204	23756	BASIC loader program "ALIEN0" with embedded machine code
96	0	24576	Ship-map data — the Nostromo's three deck maps
100	116	25716	Upper-deck air-duct map (RLE-compressed)
100	235	25835	Middle-deck air-duct map (RLE-compressed)
101	140	25996	Lower-deck air-duct map (RLE-compressed)
102	9	26121	Room grid buffer — 19 rows x 20 columns
103	133	26501	Per-room view origin table — 34 rooms x (row, column)
103	201	26569	Room marker screen-address table
104	13	26637	RoomCursor0
104	49	26673	RoomCursor1
104	85	26709	RoomCursor2
104	121	26745	RoomCursor3
104	157	26781	CrewWalkA1
104	193	26817	CrewWalkA2
104	229	26853	AnimCrewAFrames
104	237	26861	AnimCrewBFrames
104	245	26869	CharTileBitmaps
110	61	28221	RoomNameTable / UIStringTable
113	243	29171	Room adjacency map — corridor/door network
114	162	29346	Room adjacency map — air-duct network
115	76	29516	CrewNameTable
115	126	29566	Actor record array — slot 0: the alien
115	133	29573	Actor record array — status column anchor
115	134	29574	Actor record array — crew slots 1-7
115	190	29630	CorridorPosTable — the 19-cell strip / action-menu rows
116	209	29905	Per-room type table
116	244	29940	Item location table
117	10	29962	Viewed room's item list
117	32	29984	Per-item courage bonus
117	54	30006	Per-room damage meters
117	124	30076	Per-room duct-grille state
117	158	30110	Crew-condition strings
117	226	30178	Action-menu strip template
117	245	30197	Orders-menu template (the mode-0 menu strip)
118	8	30216	Crew portrait bitmaps
119	28	30492	CrewPortraitsCont
119	162	30626	CrewPortraitsCont2
120	0	30720	Narcissus corridor-view layout (RLE)
120	141	30861	Narcissus corridor-view attributes
122	9	31241	Per-screen RAM state
122	137	31369	DrawSpriteRow
122	161	31393	NextScanLine
122	185	31417	InitGameView
123	74	31562	Orders-screen crew-name row
123	89	31577	Orders-menu build, lower part
123	124	31612	FillAttrColumn
123	138	31626	DrawNextCorridorTile
123	146	31634	DrawSprite
123	202	31690	PrintName
123	233	31721	SelectSlotByDrawIdx
124	15	31759	BuildExitList
124	52	31796	BuildRoomItemList
124	76	31820	RefreshHeldItems
124	79	31823	FindHeldItems
124	113	31857	ItemIdToString
124	171	31915	BuildItemMenu
124	220	31964	DrawRoomSpecials
125	143	32143	DrawRoomTitle
126	129	32385	DrawCrewCondition
126	242	32498	FindRoomMates
127	24	32536	DrawRoomMates
127	158	32670	BlankRestOfRow
127	172	32684	ResetActionMenu
127	207	32719	RedrawRoomScene
128	48	32816	DrawSelectedName — the menu column's name row and colour bands
128	199	32967	RedrawRoomView
128	213	32981	PickDuctMap
129	129	33153	RleMapExpand
129	154	33178	SetRoomOrigin
129	199	33223	DrawDoorArm
129	251	33275	ArmStraight
130	115	33395	ClearRoomAttrs
130	141	33421	BuildDuctExitList
130	199	33479	ClearTextWindow
130	220	33500	DrawCrewPortrait
131	53	33589	AdvanceScriptPtr
131	64	33600	ResetScriptPtr
131	74	33610	Prefix a dead room-mate's name with "Body of "
131	108	33644	NarcissusBackground — the shuttle's view background
131	146	33682	Game state scratchpad RAM
132	0	33792	ActionTimeBySlot overflow — the values for slots 6 and 7
132	2	33794	RoomDispatchTable
132	70	33862	Dispatch-table tails and message text
135	76	34636	ScanInput — read the selected input device
135	80	34640	DefaultKeyScanner
135	124	34684	HandleInput
135	183	34743	AdvanceCursor
136	43	34859	UnhighlightMenuRow
136	66	34882	HighlightMenuRow
136	104	34920	GetMenuRowAttrAddr
136	117	34933	UpdateRoomMarkerB
136	151	34967	AnimateCrewA
136	200	35016	AnimateCrewB
136	249	35065	XorBlitMarker
137	16	35088	GetRoomMarkerAddr
137	29	35101	PlaceRoomMarkerA
137	56	35128	PlaceRoomMarkerB
137	74	35146	EraseRoomMarkerB
137	91	35163	OpenCrewRoomView — orders-screen rows 1-7 (the crew names)
137	138	35210	SelectDeckMap — orders-screen rows 12-14 ("Upper Deck"/"MiddleDeck"/ "Lower Deck"): redraw the map pane to show that deck. The cursor row minus 12 is exactly the deck's layout type (0/1/2), which is stored as RoomTypeByte and handed to the map-pane drawer at 31267.
137	150	35222	IndicateLocation — orders-screen row 8 (" Indicate "/" Location ")
137	156	35228	IndicateLocationPage2
137	218	35290	DrawLocationList
137	242	35314	RoomModeDispatch
138	10	35338	LocationListAction — action key in the room-location list (modes 2/3)
138	54	35382	MoveToRoom — action on a "move to:" destination row (2-6): set the actor's destination room from the row's value; in the ducts the destination comes from RoomAdjDucts by direction slot instead.
138	112	35440	QuitRoomView
138	120	35448	No-op room-action handler
138	121	35449	No-op room-action handler (second copy)
138	123	35451	SwapHeldItems
138	232	35560	MoveThroughGrille
138	250	35578	GetItemPick
139	54	35638	GetItemMenu
139	141	35725	LeaveItemHandler
139	203	35787	SpecialRowJump
139	206	35790	SpecialRowNormal
139	230	35814	SetActionTimer
140	133	35973	ResetCrewTimers — per-frame crew action-countdown walk
140	174	36014	DispatchCrewAction
140	194	36034	CrewAction1_Arrive — complete a move (action state 1)
141	5	36101	CrewAction2_DuctTransit — climb through a grille (action state 2)
141	54	36150	CrewAction3_RemoveGrille
141	91	36187	RecalcMorale — find room-mates and recompute the trio's morale
141	187	36283	MoraleFromCompanion — morale = courage + companion effects
142	76	36428	DecayCrewCourage — everyone loses a point of courage and morale
142	96	36448	BusyWait
142	105	36457	GameEntry
142	227	36579	PreActionCheck — permission gate before a crew action fires
143	109	36717	PickNextRoom
143	155	36763	ScriptNibbleToDirection
143	185	36793	RefreshRoomInfo
143	251	36859	UpdateJones
144	154	37018	UpdateAlienAI — give the idle alien its next action
145	56	37176	EnqueueMessage
145	101	37221	RenderMessage
145	202	37322	ClearMessageRow
145	243	37363	TickMessageQueue
146	114	37490	Overlap bytes shared with TickMessageQueue
146	117	37493	StartAttack
146	144	37520	CrewAction4_Handler
146	208	37584	CrewHitsAlien
147	244	37876	GatherSameRoomSlots
148	36	37924	DestroyFrontItem
148	56	37944	UpdateHandRows
148	104	37992	AlienScareCheck — will the alien flee the fight?
149	38	38182	AddAlienRoomDamage
149	173	38317	DamageOverflowFlash — the hull gives way
149	235	38379	UpdateRoomActors — per-frame ship-simulation driver
149	254	38398	FixtureAction
150	54	38454	DestructArm
150	83	38483	DestructAbort
150	129	38529	HypersleepStart
150	146	38546	FightFire — action on the fire label (cell value 76)
150	175	38575	FightFireSquirt
150	188	38588	SealLock
150	217	38617	SealLock1
150	245	38645	BlowLock
151	18	38674	BlowLock1
151	128	38784	CrewAction6_Handler — hypersleep completed (action state 6)
151	247	38903	FindTrackerHolders — run the motion-tracker scan
152	29	38941	TrackerHolderRoom — sweep the rooms around one tracker holder
152	88	39000	PickRoom_ActorScan — tail of the tracker sweep
152	129	39041	EngineStateScan — tick the three engine-room fires
152	165	39077	FireDamageTick — one burning engine room (E), fire bit in D
152	247	39159	FireSpreadCheck
153	3	39171	ViewedTrackerCheck — sound the viewed crew member's detector
153	45	39213	TrackerBeepTick
153	60	39228	JonesUneasyMsg
153	74	39242	RomBeep
153	88	39256	CrewAction5_AlienAttack — the alien's attack tick (action state 5)
153	197	39365	WoundMsg
153	232	39400	VictimItemDrop — a victim collapses
154	107	39531	OxygenTick — the oxygen clock
154	148	39572	OxygenCheckRedraw — oxygen alarms + the bottom status line
154	231	39655	InitJonesAnim
154	246	39670	TriggerJonesAnim
155	7	39687	ResetAlienXAnim
155	15	39695	TriggerAlienXAnim
155	38	39718	UpdateAlienAnim
155	61	39741	AlienAnimVars
155	84	39764	BlitAlienFrame
155	150	39830	AnimJones
155	152	39832	BlitJonesFrame
156	71	40007	AdvanceJonesPos
156	104	40040	BlitJonesShifted
156	213	40149	ClearAlienArea
157	20	40212	LaunchGate
157	89	40281	LaunchSequence — the Narcissus lifts off
157	127	40319	FrameTiming
157	170	40362	NoteTable
157	206	40398	PhrasePairs
157	224	40416	PhraseStateScratch — 2 bytes of mutable state used by PlayMusicPhrase: the current pointer into PhrasePairs.
157	226	40418	PlayNoteByIndex
157	247	40439	PlayMusicPhrase
158	56	40504	Intro-screen tile map and attribute table
159	53	40757	CrewAction7_Handler — the Android's attack tick (action state 7)
159	122	40826	UpdateAndroid
159	237	40941	CrewHitsAndroid
161	48	41264	TriggerAlienEvent — arm the Android once the alien is hurt
161	142	41358	AlienInitTable
161	158	41374	LongGameHostSlotTable
161	174	41390	LongGameTargetTable
161	190	41406	InitialItemRooms
161	212	41428	ItemChargesInit
161	228	41444	LongGameCrewInit
162	36	41508	ShortGameCrewInit
162	100	41572	UI and endgame text bank
165	36	42276	LongGameInit
166	5	42501	ClearDisplay
166	19	42515	FillAttributes
166	32	42528	Ship-map screen title and credits
166	85	42581	DrawIntroScreen
167	69	42821	GameModeScreen — crew roster + game-mode menu
168	127	43135	GameModeDispatchTable
168	133	43141	GameModeText
168	208	43216	HighlightGameMode
168	234	43242	IntroductionMode
170	7	43527	Introduction-mode sound-demo captions
170	90	43610	OptionsScreen — the input-device menu
172	9	44041	KeyboardScanner — the (redefinable) keyboard input device
172	61	44093	WaitKeyPress — wait for any key and identify it
172	77	44109	WaitKeyRelease — wait until no key is pressed anywhere
172	93	44125	EndgameScreen — every way the game can end
173	25	44313	CheckCrewAlive — the per-frame crew-extinction gate
173	51	44339	PrintAlienKilled
173	66	44354	PrintDeadRoster
173	140	44428	PrintAndroidReveal
173	164	44452	PrintRating
173	221	44509	PrintStr
173	236	44524	DamageGameOver
174	17	44561	ScreenTransition
174	47	44591	WaitKeyPrompt
174	107	44651	ComputeRating — the crew term of the Competence Rating
174	154	44698	CountRoomDamage — the ship-condition term of the Competence Rating
174	178	44722	OxygenScore — the oxygen term of the Competence Rating
174	194	44738	ShortGameInit
174	226	44770	Pause-menu texts
175	15	44815	PauseMenu
175	80	44880	PlayMusic
175	124	44924	PostCombatReset
175	138	44938	DestroyHeldItem
175	186	44986	ClearHandCache
175	196	44996	AttackRowGate
175	219	45019	AlienInfoCheck
176	24	45080	AndroidInfoCheck
176	69	45125	AndroidRowGate
176	92	45148	RefreshGrilleRow
176	151	45207	ResetRatingDigits
176	160	45216	RatingHundred
176	166	45222	ResetMsgAndScript
176	176	45232	ActionTimerFire
176	184	45240	RefreshSpecialRow
176	213	45269	SpecialRowAttack
176	222	45278	CursorGrilleToAttack
176	234	45290	MaskToRomAddr — mask an address into ROM range
176	239	45295	PickupItemBoost
177	26	45338	RefreshCrewCondition
177	54	45366	IncPairAt
177	61	45373	RefreshCondIfViewed
177	89	45401	UpdateAllCrew — pairwise companion morale support
177	158	45470	NextSlotIX
177	164	45476	KillActorRefresh
177	198	45510	BumpCourageMorale
177	221	45533	SetCourageRefresh
177	227	45539	DecayMoraleStep — tail of the DecayCrewCourage loop
178	17	45585	KillActorMoraleHit — mark a victim dead and shake the witnesses
178	74	45642	WitnessMoraleLoss
178	108	45676	KillActor_Bounce
178	115	45683	DuctSearchInit
178	124	45692	PrintNameThenPanel
178	137	45705	RoomRejectCheck
178	153	45721	AIActionSelect
178	164	45732	AlienEventDispatch
178	185	45753	PreDispatchHook
178	192	45760	ForceAttackRowIfHostile
179	6	45830	SpecialRowAction
179	22	45846	CancelActionTimer
179	30	45854	Zero-padding between game code and extra-data area
234	96	60000	AlienFrame0
235	218	60378	AlienFrame1
237	84	60756	AlienFrame2
238	206	61134	AlienFrame3
240	72	61512	JonesFrame0
240	136	61576	JonesFrame1
240	200	61640	JonesFrame2
241	8	61704	JonesFrame3
241	72	61768	JonesFrame4
241	240	61936	IntroTileData
246	24	63000	Zero-padding between intro tile data and boot-time residual
255	24	65304	Boot-time residual data