Chase H.Q.: Routines

Address	Description
5B00	The game has loaded
8014	Load a stage
80B9	Tape loading
8204	Generates engine noise (48K)
8258	Attract mode
83B5	Indirect calls for 48K/128K features
83CD	Bootstrap / Über main loop
8401	Main loop
852A	CPU driver for attract mode
858C	Pre-game radio screen ("CHASE HQ MONITORING SYSTEM")
85E4	Reveals the perp's car on the pre-game screen
860F	Animate the signal meters
865A	Draw the pre-game screen
86F6	Routine at 86F6
873C	Escape scene
87DC	Sets up the stage
8876	User input checking
88D5	Clears the game screen attributes to zero
88E2	Clears the game screen attributes and the game screen to zero
88F2	Starts a sound effect
8903	Drives sound effects
8960	Crash sound effect
89D9	"Thud" sound effect
8A0F	Cornering sound effect
8A36	"Bip" or "Bow" sound effect
8A57	Handle perp caught
8C3A	Fully smashed
8D8F	Drives transitions (scene fades)
8DF9	Seems to setup a transition
8E29	Fills the attribute bytes leftwards from column 1
8E42	Draw overlay messages
8E6C	Print a message
8E7E	Setup overlay messages
8E91	Copies the mugshots onto the screen when perp is caught
8EB7	Draws a mugshot
8EE7	Draw the smash bar
8F5F	Draws anything that's not the road or the hero car
9052	Draws overhead graphics.
916C	Draws stretchy objects, such as trees.
924D	Draws tunnel lights (and possibly other bitmaps)
9278	Draws objects (left hand version)
92E1	Draws objects (right hand version)
949C	Sprite plotter for back buffer, up to 64px wide, 15px high, no mask, no flip
9542	Sprite plotter for back buffer, up to 64px wide, 15px high, no mask, flips
9618	Random number generator
9945	Start chatter
9965	Runs chatter, mugshots and noise effect
99EC	Shows the chatter - the alerts and remarks from the game's characters
9A55	Noise in/out effect used for mugshots
9AAB	Plots a face
9AEC	Plot mini font characters
9BA7	Clear the whole message line
9BCF	Game timer
9CC2	Increments score in proportion to current speed
9CD6	Add a bonus
9D17	Increments the score by (D,E,A)
9D2E	Calculate overtake bonus
9D51	Update scoreboard and flashing lights
9DF4	Toggle the light's BRIGHT bit (HL -> attrs)
9E11	Draws the turbo sprites and updates the displayed scores
9F47	Plots an 8x15 LED font digit
9F99	Another draw string entry point?
9FB4	Draws a character (to buffer or screen?)
A0CC	Keyscan
A399	Checks for collisions
A579	Lays out roadside objects
A60E	Counters
A637	Smash/chase handling
A7F3	Spawns cars
A89C	Returns the lanes that cars can spawn in
A8CD	Hazard handler routine? Triggered at road fork
A955	Chooses random dirt and stones (not tumbleweeds though)
A97E	Lays out dirt and stones
A9DE	Dust/Stones stuff
AA38	Draw the helicopter
AAC6	Move the helicopter
AB33	Helicopter
AB9A	Spawn hazards
AC3C	Test for collision with hazard
AD0D	Routine at AD0D spawning/collision related
AD51	Routine at AD51 hazard related
ADA0	Draws hazards
B063	Hero car jumps; gear changing; turbos; off road checks; speed adjustment; turning
B318	Animates the hero car.
B4CC	Perp sighted
B4F0	Smash handling
B549	Draws the debris
B58E	Draws the car
B648	Draw the hero car's smoke
B67C	Likely NOT just drawing the cherry
B69E	This entry point is used by the routine at animate_hero_car.
B6D6	This entry point is used by the routines at draw_car and draw_smoke.
B716	Masked sprite plotter
B76C	Masked sprite plotter which flips
B7EF	Masked sprite plotter variant TBD
B848	Scroll the horizon
B8D2	Horizon stuff / Car jumping stuff
B9F4	Lays out the road
BB69	Handle exiting from a road fork
BC3E	Copies the backbuffer at $F000 to the screen (and sets attributes)
BDC1	Clears screen then sets in-game attributes
BDFB	Map reader
C0E1	Set up the tunnel
C15B	Tunnel entrance/interior/exit drawing code
C2E7	Routine at C2E7
C452	Draws the road
C8BE	Builds a pre-shifted version of the backdrop horizon image
C8E3	Forked road plotting
CBA4	Routine at CBA4
CBC5	Routine at CBC5
CBCE	Road drawing - curvature stuff?
CD3A	Seems to build the height table at $E300 and $E336.
CDD6	Multiplier
E810	Called once the memory map has been setup
E8FE	"Stop the tape" handler (48K mode only)
EBF7	Renders strings until it hits a NUL byte
EBFF	Renders a string
EC2C	Renders a single character
ECDA	Clears the screen
ECF3	Runs the redefine keys screen (48K mode only)
ED4D	Keyscan
ED6D	Defines a single key.
EE40	Interrupt setup
EE5E	Reset music
EE6E	Setup the next music pattern
EE9E	Play menu music (48K mode only)
EF19	Interrupt entry point
EF22	Drum sample player
F0C6	White noise generator
F220	128K mode routines and data
F251	Start the siren sound effect.
F269	Plays the siren sound effect.
F29D	Routine at F29D
F2A2	writing the full register set?
F2B6	Plays engine effect.
F2F1	Routine at F2F1
F2FA	Plays turbo effect, exits via engine effect.
F32E	Play speech
F39F	something done in phase 4 when perp is caught (play sample?)
F3B6	Call a routine in bank 3
F3E2	Routine at F3E2
F414	Routine at F414
F41B	Routine at F41B