Chase H.Q.: Routine at 8E42

Reveals a list of overlay message blocks - the arrest bonus screen, for one - a message at a time. Each call draws the messages revealed so far, then counts the delay down; when it hits zero a fresh delay is read from the message stream and the count goes up by one, so one more message appears next call. That continues until the stop sentinel is reached, at which point transition_control is taken from the byte before the sentinel to trigger whatever comes next.

The state is held in the code itself: the HL at 8E45 is the base message pointer, the B at 8E45 the current count and the delay is the operand at 8E49.

Used by the routines at transition and draw_mugshots.

Reveals a list of overlay message blocks - the arrest bonus screen, for one - a message at a time. Each call draws the messages revealed so far, then counts the delay down; when it hits zero a fresh delay is read from the message stream and the count goes up by one, so one more message appears next call. That continues until the stop sentinel is reached, at which point transition_control is taken from the byte before the sentinel to trigger whatever comes next. The state is held in the code itself: the HL at 8E45 is the base message pointer, the B at 8E45 the current count and the delay is the operand at 8E49. Used by the routines at transition and draw_mugshots.
draw_overlay_messages	8E42	LD HL,$0000	Load address of current message thing (frame delay, flags, attrs, bufaddr, attraddr, string)
	8E45	LD B,$00	B = 0 -- self modified by (8E58 increments it), (8E8D resets it to 1)
dom_loop	8E47	DJNZ dom_1	Loop? to dom_1
	8E49	LD A,$14	A = <self modified> frame delay. Self modified by 8E4C, 8E51, (8E84 sets it)
	8E4B	DEC A	A--
	8E4C	LD ($8E4A),A	Self modify 8E49 above
	8E4F	RET NZ	Return if non-zero
	8E50	LD A,(HL)	A = *HL
	8E51	LD ($8E4A),A	Self modify 8E49 above
	8E54	LD A,($8E46)	Increment operand of 8E45, affects TIME UP state if disabled
	8E57	INC A
	8E58	LD ($8E46),A
	8E5B	INC B	B++
dom_1	8E5C	INC HL	A = *++HL
	8E5D	LD A,(HL)	A = *++HL
	8E5E	AND A	Jump to dom_2 if A is zero
	8E5F	JR Z,dom_2	Jump to dom_2 if A is zero
	8E61	CALL print_message	Call print_message
	8E64	JR dom_loop	Loop to dom_loop
dom_2	8E66	DEC HL	transition_control = HL[-1]
	8E67	LD A,(HL)
	8E68	LD ($A231),A
	8E6B	RET	Return