Chase H.Q.

Routines

Address	Description
5B00	The game has loaded
8014	Load a stage
80B9	Tape loading
8204	Generates engine noise
8258	Attract mode
83B5	Indirect calls for 48K/128K features
83CD	Bootstrap / Uber main loop
8401	Main loop
852A	CPU driver
858C	Pre-game radio screen ("CHASE HQ MONITORING SYSTEM")
85DD	Possibly dead code
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 game or the level?
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	Sound effect - crash
89D9	Sound effect - thud
8A0F	Sound effect - cornering
8A36	Sound effect - "bip-bow"
8A57	Handle perp caught
8C3A	Fully smashed
8D8F	Drives transitions
8DF9	Seems to setup a transition
8E29	Fills the attribute bytes leftwards from column 1
8E42	Subroutine
8E6C	Print a message
8E7E	Message printing related, called for TIME UP, CONTINUE, etc. messages
8E91	Copies the mugshots onto the screen when perp is caught
8EB7	Draws a mugshot
8EE7	Draw the smash bar
8F5F	Routine at 8F5F
9023	Routine at 9023
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	Set up 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	Routine at A579
A60E	Counters
A637	Smash handling
A7F3	Spawns cars
A89C	Returns the lanes that cars can spawn in
A8CD	Hazard handler routine? Triggered at road split
A955	main_loop_18
A97E	main_loop_20
A9DE	Dust/Stones stuff
AA38	Helicopter related
AAC6	Routine at AAC6
AB33	Helicopter
AB9A	Routine at AB9A
AC3C	Test for collision with hazard
AD0D	Routine at AD0D
AD51	Routine at AD51
ADA0	Draws all hazards
B063	Hero car jumps; gear changing; off road checks; speed adjustment
B318	Routine at B318
B4CC	Perp sighted
B4F0	Smash handling
B549	Routine at B549
B58E	Draws the car
B648	Draw the hero car's smoke
B67C	Routine at B67C
B716	Masked sprite plotter
B76C	Masked sprite plotter which flips
B7EF	Routine at B7EF
B848	Routine at B848
B8D2	Routine at B8D2
B9F4	Routine at B9F4
BB69	Setup for road handling perhaps split related
BC3E	Copies the backbuffer at $F000 to the screen
BDC1	Clears screen then sets in-game attributes
BDFB	Map reader
C0E1	Tunnel setup?
C15B	Tunnel entrance/interior/exit drawing code
C2E7	Routine at C2E7
C452	Landscape related
C57C	smells like scanline/buffer pointer movement
C58A	ditto
C598	Road and backdrop plotting
C8BE	Builds a pre-shifted version of the backdrop horizon image
C8E3	Split road plotting
CBA4	Routine at CBA4
CBC5	Routine at CBC5
CBCE	Routine at CBCE - road drawing stuff
CD3A	Routine at CD3A
CDD6	Multiplier
E810	Called once the memory map has been setup
E8FE	Routine at E8FE
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
ED4D	Keyscan
ED6D	Routine at ED6D
EE40	Interrupt setup
EE5E	Routine at $EE5E -- suspect a music reset routine
EE6E	Routine at EE6E
EE9E	Define keys
EF19	Routine at $EF19
EF22	Drum sample player
F0C6	White noise generator?
F220	128K mode routines and data