Routines

Address	Description
50A0	Clear character buffer 0xD6
50B9	Print a message centred across the entire screen
50E5	Populate a row of the screen with machine code
51A0	Change a character's name
51DC	Guide a character onto the catwalk or off it
52A0	Display the cast of characters and change their names
53A0	Do essential POKEs before the game starts
53AB	Make a walking sound effect (yellow border)
53B1	Clear the screen and request the input method (keyboard, joystick, Int2)
54A0	Set the input method, change the characters' names, and start the game
54F2	Prepare addresses 5D00 to 5FFF
55A0	Count down from 9 to 0
5D00	Deal with ERIC while he's falling (2)
5D23	Deal with ERIC's flight from the saddle of the bike
5D33	Deal with ERIC's descent from the top-floor window
5D37	'T' pressed - throw away the water pistol
5D4F	'J' pressed - jump
5D63	Deal with ERIC when he's jumping
5DDC	Compare blackboard contents with combinations
5E45	'W' pressed - write on a blackboard
5E6F	Deal with ERIC when he's writing on a blackboard
5EAD	Deal with ERIC when he's firing the catapult, hitting or kissing
5EB7	Signal that ERIC is firing the catapult, hitting, or kissing
5EC7	'H' pressed - hit
5EE8	'F' pressed - fire catapult
5F08	Make HAYLEY hit ERIC
5F1C	'K' pressed - kiss
5F9D	Play a tune
6000	Superimpose sprite tiles onto a tile of the play area
606C	Print a tile
6130	Update a character's animatory state and location and update the SRB
61B4	Update the SRB for a character's current animatory state and location
61C2	Scroll the screen left 8 columns
61F8	Scroll the screen right 8 columns
6264	Copy two bytes from a command list into a character's buffer
627D	Collect one byte from a command list
6291	Get a random number
62A0	Update the display
62D0	Move the characters
638C	Terminate a command
639F	Call an interruptible subcommand
63B0	Jump to an interruptible subcommand
63B5	Set the interruptible subcommand (unused)
63BE	Determine ERIC's y-coordinate
63D2	Get the play area region identifier for a given location
63ED	Guide a character to an intermediate destination
6438	Guide a character up a staircase
644D	Guide a character down a staircase
6464	Make a character go to a location
64D7	Make a character go to a random location
64F3	Determine the next move of a character following another character
6558	Make a teacher find ERIC
65D4	Check whether a character is beside a chair
6618	Check whether a chair is occupied
663F	Knock the current occupant (if any) out of a chair
6670	Deal with a character who's been dethroned (1)
667F	Deal with a character who's been dethroned (2)
6697	Deal with a character who is looking for a seat
66C0	Make a character find a seat
66CE	Get the next character of a message being spoken or written
670C	Update the SRB for a blackboard
6755	Get the identifier and coordinates of the blackboard close to a character
6780	Move the bike if it's obstructing the boys' skool door or the gate
6791	Write a single character on a blackboard
680F	Make a teacher wipe a blackboard
6880	Make a character write on a blackboard
68E1	Update the SRB so that the speech bubble is not corrupted
691E	Remove the speech bubble
693D	Print a speech bubble UDG
694E	Print the speech bubble
69E6	Place a font character bitmap into a message graphic buffer
6A08	Make a character speak
6A8C	Save the area of the screen that will be overwritten by a message box
6AE4	Copy a graphic buffer to the screen
6B1B	Write a line of text into a graphic buffer
6B46	Print a message box
6B69	Print the score, lines total or hi-score (2)
6BB4	Compute the decimal digits of a number
6C18	Alter UDG references in the play area for a door, a window, a cup or the bike
6C9C	Check whether any characters were punched
6CAC	Check whether any characters have been hit by a fist, pellet or conker
6CD4	Prepare the doors, windows, cups and bike for new game
6CEE	Get the x-coordinate range within which a character can see or be seen
6D00	Control a boy during assembly
6D32	Check whether a target character can be seen by another character
6D62	Check whether ERIC can be seen by an adult
6D7D	Check for main kids near a teacher
6DA3	Check whether a location is on the assembly hall stage
6DB5	Determine which floor ERIC's on when he's not standing directly on one
6DD2	Put ERIC midstride
6E00	Move ERIC from the midstride or mid-action position and scroll the screen if necessary
6E38	Turn ERIC round
6E50	Check whether a character is on a staircase
6E91	Deal with ERIC when he has stepped off the stage
6E9B	Check for walls and closed doors in front of ERIC
6F14	'P' pressed - right
6F2C	'O' pressed - left
6F44	'Q' pressed - up
6FA0	'A' pressed - down
6FF2	Collect the identifier and coordinates of a blackboard that will be wiped
7000	Check for walls, closed doors and ALBERT in front of the bike
7040	Open or close a door or window
705F	Check for a closed door in front of a character
708E	Check for a closed door in a character's path and open it if allowed
70B7	Make a character open or close a door
70CD	Close any temporarily open doors if necessary
7118	Score 100 points and make the sound of a mouse being caught
7132	Make a female character stop jumping
7140	'D' pressed - drop stinkbomb
7154	Make a walking sound effect (blue border)
7166	Prevent ERIC from getting past ALBERT if necessary
717C	Make a character open or close a door
71AD	Move the bike if it's obstructing the skool gate
71BE	Get the ASCII code of the last key pressed
71FA	Get the keypress offset of the last key pressed
720A	Control the bike when ERIC's not sitting on the saddle
725E	Deal with ERIC when he's riding the bike
7316	Deal with ERIC when he's standing on the saddle of the bike
7380	Display the frog in ERIC's inventory
7386	'M' pressed - mount bike
73AD	Print the score, lines total or hi-score (1)
73B5	Add to the score and print it
73CB	Add to the lines total and print it
73F1	Open the Science Lab storeroom door if ERIC has the key
7400	Calculate appropriate coordinates for a message box
7414	Make a teacher give lines
748C	Make a sound effect
74A0	Check whether any adults were hit by the pellet, water, sherry or conker
74C8	Control the descent of the water, sherry or conker
7596	Deal with a character who has been knocked over
75FD	Check whether a pellet has hit a cup
7615	Check whether a pellet has hit a cup containing water, sherry or the frog
7654	Check for walls, doors and windows in the path of a mouse, frog or pellet
76AC	Control the flight of a catapult pellet
7746	Initialise an uninterruptible subcommand
774F	Check whether a character is on the top, middle or bottom floor
775B	Make BOY WANDER fire his catapult now and then
77B3	Deal with BOY WANDER when he is firing
77C8	Check whether any characters were or can be punched by ERIC or ANGELFACE
77F2	Make ANGELFACE hit now and then
7813	Deal with ANGELFACE when he is hitting
7842	Knock down a main kid hit by a pellet
7854	Deal with the frog when it has been knocked out of a cup
78BA	Control the frog
7966	Control a female character while she's standing on a chair or jumping (1)
7974	Make a female character stand on a chair or start jumping
7998	Control a female character while she's standing on a chair or jumping (2)
79AE	Make any female characters near a mouse start or continue jumping
7A16	Control a mouse
7AE6	Release some mice (if possible)
7B0E	Prepare character buffers for released mice
7B55	Make ERIC catch a mouse or frog (if present)
7BEB	Update the SRB for ERIC or his pellet and scroll the screen if necessary
7BF5	Make ERIC catch the frog (if possible)
7C02	Print the inventory
7C64	Print an inventory item
7C75	Collect the bit mask and game status buffer address for an event identifier
7C8F	Check whether a signal has been raised
7C95	Raise the signal for a certain event (unused)
7C98	Raise the signal for a certain event
7CA1	Lower the signal for a certain event (unused)
7CAB	Check whether a character should continue walking up and down
7CD0	Make a character walk up and down until a certain time
7CE1	Make a character walk up and down a few times or until a certain time
7D00	Get the identifier for ERIC's location
7D15	Check whether ERIC is where he should be
7D20	Make any nearby teacher give ERIC lines if necessary (1)
7D36	Make MR WACKER find the truant ERIC
7D3E	Make any nearby teacher give ERIC lines if necessary (2)
7E75	Make MISS TAKE chase ERIC (1)
7E7B	Make MISS TAKE chase ERIC (2)
7EB1	Print the lesson and ring the bell
7EF1	Make BOY WANDER write on a blackboard
D224	Make a character do nothing
E125	'C' pressed - catch a mouse or the frog
E145	Deal with ERIC when he's bending over, dropping a stinkbomb etc.
E225	'R' pressed - release mice
E236	Prepare buffer 0xD5 for use by a stinkbomb cloud
E24F	Check whether buffer 0xD6 is being used
F000	Control EINSTEIN during class
F017	Make EINSTEIN speak
F02F	Make a teacher give lines to EINSTEIN or the kid he grassed up
F048	Check whether ERIC and EINSTEIN are in class
F05D	Make a teacher tell the class what to do
F073	Restart the command list or make a teacher tell the kids to sit down
F09B	Make a teacher find the truant ERIC
F0B8	Restart the command list
F0BF	Make a teacher find ERIC if he's absent during dinner
F0DA	Control a teacher during assembly
F100	Make a teacher conduct a class
F250	Make MR WACKER put the kids in detention
F28E	Deal with ERIC when he's been knocked over
F2E2	Deal with ERIC when he's sitting or lying down
F3D7	'S' pressed - sit (1)
F3E6	Make ERIC sit in a chair or on the floor
F3FC	'S' pressed - sit (2)
F413	Collect a keypress during the game (or simulate one in demo mode)
F460	Make the next command be the start of the command list
F46C	Restart the command list unless the boys' skool door is closed
F487	Jump forward in the command list if the boys' skool door or the gate is closed
F49C	Wait till everyone has gone past the gate or the boys' skool door
F4CC	Make ALBERT keep an eye out for ERIC during lessons
F532	Set MR WACKER on his way to expel ERIC
F54A	Make MR WACKER find the truant ERIC
F55F	Make MR WACKER find and expel ERIC
F5BE	Prepare for a new game
F6B4	Move the characters, close doors, and give ERIC lines if necessary
F6BE	Start a new game if a key is pressed while ERIC's sitting or lying down in demo mode
F6D5	Start a new game or enter demo mode
F6EA	Main loop
F74D	Change the lesson
F7AD	Deal with ERIC
F7D7	Place a continual subcommand routine address into a character's buffer
F7DF	Make ANGELFACE stalk HAYLEY
F804	Make ANGELFACE or BOY WANDER hit or fire now and then
F80D	Restart the command list unless it's time for assembly
F818	Scroll the display file left or right one column
F841	Scroll the display file left one column
F849	Scroll the display file right one column
F858	Clear various game and lesson flags
F862	Deal with a stinkbomb when dropped
F939	Deal with MR WACKER's journey to a window
F975	Prepare the buffer for ERIC's catapult pellet and make a sound effect
F986	Check for the presence of a plant pot
F99A	'G' pressed - fire water pistol
F9AB	Control water fired from the pistol (1)
FA39	Control water fired from the pistol (2)
FA4D	Deal with water fired from the pistol at certain phases
FAF2	Begin ERIC's descent from a plant, a plant pot, or the assembly hall stage
FB03	Deal with ERIC when he's stepping off a plant, a plant pot, or the assembly hall stage
FB3C	Deal with ERIC when he's standing on a plant or plant pot
FBA0	Deal with ERIC when he's falling to the floor to land on his feet
FBCC	Deal with ERIC while he's falling (1)