Routines

Address	Description
6000	Scroll the screen right one column
609B	Scroll the screen left one column
6100	Print a tile (unused)
610B	Print a tile
618C	Collect one byte from a command list
61A1	Get a random number
61B0	Update a character's animatory state and location and update the SRB
6214	Update the SRB for a character's current animatory state and location
6226	Move the characters
62A0	Terminate a command
62B2	Determine whether a character should be moved (1)
62D7	Make a character walk up and down until a certain time
6317	Determine whether a character should be moved (2)
631E	Check whether a signal has been raised
633C	Guide a character to an intermediate destination
638C	Guide a character up a staircase
6390	Guide a character down a staircase
63BE	Make a character go to a location
645F	Guide a character from the top floor to another floor
6464	Guide a character from the bottom floor to another floor
6496	Guide a character to a location on the same floor
64D2	Scroll the screen right 8 columns
64DC	Scroll the screen left 8 columns
64E6	Update the display (unused)
6500	Move ERIC from the midstride position and scroll the screen if necessary
653C	Put ERIC midstride, or raise his arm while writing on a blackboard
6564	Check whether ERIC is sitting or lying down
656A	Turn ERIC round
657F	'A' pressed - down
65E4	'Q' pressed - up
6648	Check whether a character is on a staircase
6652	'O' pressed - left
66AA	'P' pressed - right
66E6	Change the lesson
6736	Get the ASCII code of the last key pressed (unused)
673A	Get the ASCII code of the last key pressed
6752	Ring the bell
6767	Main loop
67D8	Get input from the Kempston joystick if it's in use
68A0	Request and set the input method (keyboard, joystick, Int2)
6900	Start a new game or enter demo mode
6980	Update the SRB for one column of a sprite
6992	Update the display
69D2	Set a random destination for a character
69E7	Make a character go to a random location
69F6	Make a little boy trip people up
6A3C	Make a stricken character give lines if he's a teacher
6A46	Deal with a character who has been knocked over
6A6E	Make little boy no. 1 go to a place at random and trip people up on the way
6A82	Make a little boy find and follow little boy no. 1
6AA7	Deal with ERIC when he's been knocked over
6AD7	Return to the main loop having already dealt with ERIC
6AD9	Deal with ERIC
6AFB	Add to the score and print it
6B0E	Print the bottom three lines of the screen
6B32	Send a character on a mini-walkabout
6B3D	Make a character walk up and down a few times or until a certain time
6B54	Lower the signal for a certain event
6B58	Raise the signal for a certain event
6B7D	Knock the current occupant (if any) out of a chair
6B97	Check whether a chair is occupied and unseat any occupant
6BF0	Check whether a character is beside a chair
6C55	Deal with a character who's been dethroned (1)
6C64	Deal with a character who's been dethroned (2)
6C7C	Deal with a character who is looking for a seat
6CA0	Make a character find a seat
6CAF	'S' pressed - sit/stand
6CF0	Make a character stand up if he's not already standing
6D0A	Get the base address of the graphic data for a sprite tile
6D1C	Control the horizontal flight of a catapult pellet
6DC6	Control the vertical flight of a catapult pellet
6DEF	Check whether a shield has been hit
6E33	Select a special PLAYTIME occasionally
6E3C	Check whether a boy can be seen by a teacher
6E90	Determine which floor is nearest to a character
6EA7	Get the x-coordinate range within which a character can see or be seen
6F00	Check whether a character was or can be punched by ERIC or ANGELFACE
6F1E	Make ANGELFACE hit now and then
6F80	Make ANGELFACE throw a punch (1)
6F8E	Make ANGELFACE throw a punch (2)
6F99	Check whether anyone was punched by ERIC or ANGELFACE
6FE2	Make ANGELFACE throw a punch (3)
6FEF	Make ANGELFACE throw a punch (4)
6FF9	Make BOY WANDER fire his catapult (1)
7000	Make BOY WANDER fire his catapult now and then
702C	Make BOY WANDER fire his catapult (2)
703D	Make BOY WANDER fire his catapult (3)
7048	Make BOY WANDER fire his catapult (4)
7067	Make BOY WANDER fire his catapult (5)
7072	Make BOY WANDER fire his catapult (6)
707F	Make BOY WANDER his fire catapult (7)
7087	Update the SRB for a blackboard or the speech bubble lip
70D2	Get the next character of a message being spoken or written
7128	Get the identifier and coordinates of the blackboard closest to a character
7142	Write a single character on a blackboard
71DC	Make a teacher wipe a blackboard (1)
71E8	Make a teacher wipe a blackboard (2)
7264	Make a character write on a blackboard
72D2	Update the SRB for the middle six columns of the speech bubble
7302	Slide a message character into the speech bubble text window (2)
734E	Print the speech bubble
740A	Slide a message character into the speech bubble text window (1)
7427	Update the SRB for the speech bubble
7432	Remove the speech bubble
74AF	Save the area of the screen that will be overwritten by a lines bubble
7519	Copy a graphic buffer to the screen
755A	Write a line of text into a graphic buffer
7591	Insert a pixel column into a graphic buffer
75B4	Draw the left and right edges of a lines bubble
75CC	Print a reprimand message
7600	Write a character's name into the lines bubble graphic buffer
7632	Insert a pixel column into the number graphic buffer
7646	Generate graphic data for a number
76C8	Print the score, lines total or hi-score (1)
76E0	Write the number of lines into the lines bubble graphic buffer
76F9	Print the score, lines total or hi-score (2)
7700	Make a teacher give lines
77AC	Make any nearby teacher give ERIC lines if necessary
78AA	Make a teacher give lines to the closest main kid
7940	Print the lesson
7986	Make a character speak (1)
799A	Make a character speak (2)
79BA	Control EINSTEIN during class (1)
79CA	Control EINSTEIN during class (2)
79D4	Check whether ERIC is where he should be
79FD	Get ERIC's coordinates
7A32	Prepare a question and answer
7ADC	Determine the next move of a character following another character
7B96	Rewind to a specific point in a command list
7BA0	Make a teacher find the truant ERIC
7BFB	Move a character looking for ERIC from the midstride position
7C18	Move a character looking for ERIC to the midstride position
7C3F	Restart the command list unless it's time to start the lesson
7C47	Restart the command list
7C5A	Place a continual subcommand routine address into a character's buffer
7C6E	Make a teacher perform dinner duty (1)
7C97	Make a teacher perform dinner duty (2)
7CA0	Make a teacher give lines to EINSTEIN for telling tales
7CAF	Make EINSTEIN speak
7CC8	Make a teacher wait for EINSTEIN to finish speaking
7CD0	Check whether ERIC and EINSTEIN are in class
7CE0	Make a teacher decide whether to give EINSTEIN lines for telling tales
7CF1	Call an interruptible subcommand
7CFC	Make a teacher tell the kids to go to a certain page in their books
7D30	Make a teacher conduct a class without ERIC
7D84	Make a teacher tell the kids to sit down
7D9E	Make BOY WANDER write on a blackboard
7DA7	Make BOY WANDER write on a blackboard if the teacher hasn't arrived yet
7DB2	Make a teacher conduct a class
7DD8	Insert a pixel column into the top or bottom half of the speech bubble text window
7DEA	Make a character walk fast
7DF2	Make a character speak at the correct speed
7DFA	Exit demo mode
7E17	Play a tune
7E86	Play the theme tune for the first time
7E90	Play the theme tune
7E96	Play the 'Got all shields/opened safe' tune
7EA2	Play the first part of the 'Got all shields/opened safe' tune
7ED6	Remove the speech bubble if present
7EE4	Save Skool Daze to tape
ADE8	Insert a pixel column into the message graphic buffer
AEE8	Insert message text into the message graphic buffer
AF77	Prepare a character to be walked onto the screen (1)
AFE8	Print a message centred across the entire screen
B072	Get the LSB of the message address for a main character's name
B0E8	Print a character's title and name, and walk him onto the screen (1)
B175	Prepare a character to be walked onto the screen (2)
B1E8	Print a character's title and name, and walk him onto the screen (2)
B272	Prepare a message in the message graphic buffer (1)
B2E8	Print a character's title and name, and walk him onto the screen (3)
B371	Prepare a message in the message graphic buffer (2)
B3E8	Print a character's title and name, and walk him onto the screen (4)
B3F6	Print 'PRESS'C'TO CHANGE NAME'
B47A	Prepare a character to be walked onto the screen (3)
B4E8	Move a character one step along the catwalk
B5E8	Guide a character onto the catwalk or off it
B6E8	Print 'PRESS'C'TO CHANGE NAME' and wait for a keypress
B7E8	Collect a keypress while a character's name is being entered
B868	Change a character's name (1)
B8E8	Change a character's name (2)
E4EC	Play the 'hit a shield' sound effect
EAE0	Make a hitting sound effect
EAEB	Make a jumping sound effect
EDE0	Prepare for a new game
EEE0	Prepare to change the names of the characters
EFE0	Display the cast of characters and change their names
F300	Make a teacher conduct a class with ERIC
F400	Make a teacher conduct a question-and-answer session
F41F	Deal with ERIC when he's firing the catapult
F46E	'F' pressed - fire catapult
F492	'H' pressed - hit
F499	'J' pressed - jump
F4A4	Deal with ERIC when he's hitting
F4D2	Get the attribute file address of a pellet's potential target or the safe
F4F1	Set the new score and print it
F4FA	Open the lip of the speech bubble
F51E	Check whether ERIC has jumped up to the safe or a shield (1)
F533	Deal with ERIC when he's jumping
F5B9	Check whether ERIC is standing on a boy who's been knocked out
F5DA	Collect a keypress during the game (or simulate one in demo mode)
F650	'W' pressed - write on a blackboard
F6AA	Deal with ERIC when he's writing on a blackboard
F6D7	Make MR CREAK reveal his safe combination letter if appropriate
F6FF	Get the address of the appropriate 'Go home' message
F70A	Unflash the safe and all the shields
F726	Check whether ERIC has jumped up to the safe or a shield (2)
F778	Deal with ERIC when he's being spoken to by a little boy
F78E	Make a character find ERIC
F7E0	Make MR WACKER give ERIC 2000 lines
F800	Make little boy no. 10 give ERIC a message
F855	Generate a safe combination code and set MR CREAK's birth year
F8B4	Adjust the game mode
F8F6	Check whether MR CREAK can reveal his safe combination letter
F905	Collect the identifier for the next lesson
F918	Scroll the skool into view and enter the main loop
F923	Make MR CREAK ask the birth year question if appropriate
F955	Make a stricken teacher give lines or reveal his safe combination letter
F9A5	Print the lesson
F9BB	Check whether ERIC has 10000 lines
F9DC	Make a teacher tell ERIC to go home, and end the game (1)
F9E5	Compare a character's coordinates with ERIC's
F9F6	Make a teacher tell ERIC to go home, and end the game (2)
FA04	Adjust the lesson length and prepare a character for the search for ERIC
FA10	Check whether MR CREAK is near a blackboard last written on by ERIC
FA23	Restart command list 0xDC
FA2A	Check whether ANGELFACE is touching ERIC
FA49	Ask whether the characters' names should be changed
FE40	Make a walking sound effect (yellow border)
FE52	Make a walking sound effect (blue border)
FE57	Make a knocked-out sound effect
FE75	Make a catapult sound effect