TirNaNog

Memory map

Page	Byte	Address	Description
90	38	5A26	Data block at 5A26
91	0	5B00	Holds the bitmaps which appear behind the hero. These get blitted back when scrolling.
92	48	5C30	Data block at 5C30
94	42	5E2A	Vectors 1
94	90	5E5A	Data block at 5E5A
94	94	5E5E	Call HL vector.
94	95	5E5F	Offsets used when detecting things of edge of screen. Each 8 bytes represent a rect offset for a compass setting.
94	159	5E9F	Movement Vectors
94	175	5EAF	Increase in x axis.
94	183	5EB7	Increase in y axis (0 is top).
94	191	5EBF	Decrease in x axis.
94	199	5EC7	Decrease in y axis
94	207	5ECF	Routine at 5ECF
95	113	5F71	Routine at 5F71
96	14	600E	Rotate right an area of the screen (Clouds)
96	59	603B	Routine at 603B
96	113	6071	Update area data and set compass to correct direction.
96	171	60AB	Routine at 60AB
96	172	60AC	Initialise Hero
96	239	60EF	Display Game Screen
96	253	60FD	See which path intersects the hero position.
97	184	61B8	Get Next Path
98	54	6236	Print Location Description
98	174	62AE	Draw the whole stage.
99	82	6352	Sky Colours
99	138	638A	Update the screen.
101	52	6534	Routine at 6534
101	136	6588	Each byte represents a frame from our Hero's animation.
101	143	658F	Data block at 658F
101	186	65BA	Previous Input Flags
101	191	65BF	Handle the input for hero.
105	241	69F1	Routine at 69F1
106	24	6A18	Blits an action item.
106	55	6A37	Routine at 6A37
106	97	6A61	Routine at 6A61
108	131	6C83	Waterfall Action Function.
108	204	6CCC	Display the winning message and change the rooms colour.
108	252	6CFC	Vectors
109	48	6D30	hl = ABS(hl-de)
109	60	6D3C	Print String
109	73	6D49	Converts a stored position to address of top bit of DF & ATTR.
109	118	6D76	Create new link for Actions Link List.
109	163	6DA3	Insert link(IX) to begining of list start of unused links list.
109	192	6DC0	Check for alternate bitmap.
109	230	6DE6	Unused
109	232	6DE8	Draw a single column (8 pixels wide) of a bitmap using item data to calculate which column and where on the offscreen to draw.
110	197	6EC5	Rect Intersection Test. Returns carry set if not.
111	20	6F14	Address of offscreen column
111	24	6F18	Data block at 6F18
111	25	6F19	When set to 1, there is a path leading off into the screen.
111	34	6F22	Draws a single column on the screen using the next object based on position.
117	28	751C	Data block at 751C
117	31	751F	Mirror Bitmap.
117	124	757C	Data block at 757C
117	128	7580	Check for leaving the area.
118	99	7663	Scenery Action Data [bitmap index, function pointer]
118	138	768A	Create Action for a Scenery Object
118	248	76F8	Scan in keyboard state
119	13	770D	Convert keybard states stored, into movement.
119	172	77AC	Routine at 77AC
120	52	7834	Action Handler for Nathair
122	53	7A35	Insert charcter bitmap into a sprite bitmap. (Key icon on a door).
122	100	7A64	Action Handler for the Olcweed
123	1	7B01	Data block at 7B01
123	12	7B0C	Vectors
123	67	7B43	Routine at 7B43
123	71	7B47	Routine at 7B47
123	220	7BDC	Data block at 7BDC
123	223	7BDF	Animate Background
124	48	7C30	Routine at 7C30
124	68	7C44	Clears the lower third screen area.
124	99	7C63	Print out the inventory.
125	73	7D49	Routine at 7D49
125	197	7DC5	Pick up.
126	144	7E90	Drop object
127	93	7F5D	'Select' key pressed.
127	114	7F72	Direction of each frame for hero. (1 right, 2 left).
127	126	7F7E	Data block at 7F7E
127	135	7F87	Data block at 7F87
127	167	7FA7	Copy background into hero's background store and draw correct frame for hero.
128	208	80D0	Updates bitmaps behind hero and sidhe.
129	60	813C	Routine at 813C
129	138	818A	Data block at 818A
129	142	818E	Routine at 818E
130	110	826E	Routine at 826E
130	203	82CB	Routine at 82CB
130	241	82F1	Routine at 82F1
132	86	8456	Routine at 8456
133	154	859A	Update Sidhe
133	225	85E1	Baddy Sprite Blit
135	152	8798	Blit the background behind the Sidhe.
135	191	87BF	Routine at 87BF
136	199	88C7	Face Action Function.
137	31	891F	Vectors
137	37	8925	Vectors
137	61	893D	Data block at 893D
137	77	894D	Cave Data
137	175	89AF	Display Warning
137	220	89DC	Data block at 89DC
137	224	89E0	Checks for an exit when hero walks off a path edge / end.
138	141	8A8D	Cave Action Function Pointer.
138	147	8A93	Update data for new room.
140	254	8CFE	Select character set and draw character. Anything less than 51 gets drawn in the ROM set, else it uses the special set.
141	17	8D11	Routine at 8D11
141	80	8D50	Action Handler for Oracle
141	166	8DA6	Action Handler (Does nothing)
141	167	8DA7	Alter of the Seal Extended Action Data
141	182	8DB6	Action Hander for Alter of the Seal.
141	237	8DED	Tablet extended action data
141	249	8DF9	Data block at 8DF9
141	252	8DFC	Tablet / Alter Action Function.
142	192	8EC0	Display Menu
143	62	8F3E	Display Start Tape
143	147	8F93	Routine at 8F93
143	198	8FC6	Routine at 8FC6
143	229	8FE5	Display Abandonded
143	255	8FFF	Display Enter Version Letter
144	48	9030	Store; sprites [ y,x, height in pixels, width in chars]
144	52	9034	Information on each bitmap.
147	208	93D0	A link in the link list.
147	228	93E4	Next Link
148	54	9436	Bitmap: Hero
164	182	A4B6	Bitmap: Nathar
166	102	A666	Bitmap: Hero mask
175	6	AF06	Bitmap: Objects
175	134	AF86	Bitmap: Landscape items
194	150	C296	Bitmap: Objects
198	166	C6A6	Bitmap: Enemies
204	6	CC06	Bitmap: Smoke
204	214	CCD6	Bitmap: Alter of the Seal
205	118	CD76	Bitmap: The Oracle
206	54	CE36	Bitmap: Compass
207	23	CF17	Bitmap: Landscapes
221	183	DDB7	Bitmap: Cernos
223	130	DF82	Vectors
223	144	DF90	Data block at DF90
223	195	DFC3	Man Data
223	210	DFD2	Directional Data
224	15	E00F	CERNOS Stop word parity issue
224	16	E010	Area Data
226	102	E266	Area Names
227	138	E38A	Mappings
227	229	E3E5	Scenery Data
239	21	EF15	Pointers to list of objects in each area
239	145	EF91	Objects
243	149	F395	Treasure Action Function.
244	41	F429	Offscreen Blit to DF.
244	97	F461	Creates a link list from a sequence of data blocks. The pointer to the next address (next block defined by C) is stored in the first word of the block.
244	114	F472	Initialise link lists.
244	135	F487	Stack Pointer Store
244	137	F489	Start
245	21	F515	Main() & Run()
245	54	F536	Baddy offscreen address.
246	9	F609	Offscreen : This is 34 columns wide to give an extra clipping column either end.
252	0	FC00	This is used to point the system charset to the defined bitmaps.
254	160	FEA0	TirNaNog charset