Memory map

Page	Byte	Address	Description
96	0	24576	The game has just loaded
98	41	25129	Main loop
98	79	25167	Read the keyboard and update Horace's sprite accordingly
99	55	25399	Move Horace and the guards
99	218	25562	Move a guard
101	30	25886	Redraw the tiles behind Horace and the guards if they've moved
101	91	25947	Redraw the tiles behind a guard after he's moved
101	161	26017	Add to the score if Horace has eaten something
102	34	26146	Draw the guards
102	61	26173	Draw a guard
102	164	26276	Check whether Horace has run into a guard
103	58	26426	Lose a life
104	33	26657	Draw Horace
104	106	26730	Draw the bell and check whether Horace has sounded the alarm
105	7	26887	Check whether a guard should drop his lunch
105	34	26914	Make a guard drop his lunch if necessary
105	108	26988	Decrement the guard countdown timers
105	142	27022	Toggle the sound on/off if 'T' is pressed
105	164	27044	Ring the bell if necessary
106	23	27159	Unused
106	30	27166	Enter the next maze
106	34	27170	Initialise the guard countdown timers
106	63	27199	Copy a guard buffer into the temporary location
106	106	27242	Copy the temporary guard buffer back into place
106	119	27255	Make the title screen or game over sound effect
106	158	27294	Get the tunnel offset and bell, initial guard and entrance locations for the current maze
106	167	27303	Copyright © 1982 Beam Software...
106	231	27367	DEMO MODE  PRESS ANY KEY TO PLAY
107	8	27400	Title screen countdown timer
107	10	27402	Active guard counter
107	11	27403	Game mode indicator
107	12	27404	Wait for 26*BC+5 T states
107	18	27410	Collect a pseudo-random number (from the ROM)
107	33	27425	Print the score or high score
107	72	27464	Compute and print a digit
107	117	27509	Draw the current maze
107	214	27606	Draw a sprite
107	250	27642	Print a tile or font character
108	15	27663	Convert a sprite location or display file address into an attribute file address
108	32	27680	Check the attribute bytes at a sprite's location
108	70	27718	Check the attribute byte at a sprite tile location
108	104	27752	Copy maze background tiles into a guard's buffer
108	149	27797	Copy a maze background tile into a guard's buffer
108	194	27842	Check the tiles next to Horace or a guard
108	250	27898	Identify a tile in front of a sprite
109	23	27927	Get the location of the tile in front of a sprite
109	78	27982	Print 'HUNGRY' or 'HORACE' on the title screen
109	166	28070	Guard countdown timers
109	174	28078	Guard panic timer
109	176	28080	Temporary store for a guard's screen x- and y-coordinates
109	178	28082	Temporary store for direction probability parameters
109	182	28086	Buffer address of the guard currently being handled
109	184	28088	Temporary guard buffer
109	227	28131	Guard buffers
110	143	28303	Data for the word 'HUNGRY' on the title screen
111	47	28463	Data for the word 'HORACE' on the title screen
111	207	28623	Tunnel offset and bell, initial guard and entrance locations for the current maze
111	215	28631	Tunnel offset and bell, initial guard and entrance locations for maze 1
111	223	28639	Tunnel offset and bell, initial guard and entrance locations for maze 2
111	231	28647	Tunnel offset and bell, initial guard and entrance locations for maze 3
111	239	28655	Tunnel offset and bell, initial guard and entrance locations for maze 4
111	247	28663	Maze 2 layout
114	247	29431	Maze 1 layout
117	247	30199	Maze 3 layout
120	247	30967	Maze 4 layout
123	247	31735	Maze tiles
124	71	31815	PASSES   SCORE       BEST
124	97	31841	Sprite movement timer
124	98	31842	Game speed parameter (1-8)
124	99	31843	Current maze number
124	100	31844	Redundant temporary variable
124	101	31845	Lunch-drop countdown timer
124	103	31847	Address of the next pseudo-random number
124	105	31849	Sound on/off indicator
124	106	31850	'T' pressed indicator
124	107	31851	Horace's current location
124	109	31853	Horace's new location
124	111	31855	Temporary store for direction keypress
124	112	31856	Horace's animation frame (0-3)
124	113	31857	Horace's attribute byte
124	114	31858	Horace's walking animation timer
124	115	31859	Score
124	117	31861	High score
124	119	31863	Extra life indicator
124	120	31864	Number of lives remaining
124	121	31865	Tunnel timer
124	122	31866	Temporary store for Horace's screen x- and y-coordinates
124	124	31868	Cherry and strawberry graphics
124	196	31940	Bell location
124	198	31942	Bell animation frame counter
124	199	31943	Horace graphics
125	199	32199	Guard graphics
127	7	32519	Bell graphics
127	135	32647	Blank sprite