Atic Atac: Routine at 95DA

Used by the routine at FRAME_TICK_NEXT.

The clock counts up rather than down -- Atic Atac's TIME is how long you have been in the castle, not how long is left. Three bytes of BCD at $5E3D, $5E3E and $5E3F hold it, and the panel prints them as one digit, then two, a colon, then two: 000:09.

Its time base is the ROM's own FRAMES counter, which ticks 50 times a second on the interrupt the game leaves enabled. Rather than remember when the last second was, it subtracts 50 from FRAMES whenever there are at least 50 there, so the remainder carries the fraction of a second forward and nothing drifts.

Confirmed against a running game: with the three bytes reading $00 $00 $09 the panel showed TIME 000:09.

Used by the routine at FRAME_TICK_NEXT. The clock counts up rather than down -- Atic Atac's TIME is how long you have been in the castle, not how long is left. Three bytes of BCD at $5E3D, $5E3E and $5E3F hold it, and the panel prints them as one digit, then two, a colon, then two: 000:09. Its time base is the ROM's own FRAMES counter, which ticks 50 times a second on the interrupt the game leaves enabled. Rather than remember when the last second was, it subtracts 50 from FRAMES whenever there are at least 50 there, so the remainder carries the fraction of a second forward and nothing drifts. Confirmed against a running game: with the three bytes reading $00 $00 $09 the panel showed TIME 000:09.
TICK_CLOCK	95DA	LD A,($5C78)	Fewer than fifty frames since the last tick, so there is nothing to do yet.
	95DD	CP $32
	95DF	RET C
	95E0	SUB $32	Take a whole second out and leave the remainder for next time.
	95E2	LD ($5C78),A
	95E5	LD HL,$5E3F	The seconds, the last of the three bytes.
	95E8	LD A,(HL)	INC then DAA -- adding 1 in BCD, so the digits stay printable.
	95E9	INC A
	95EA	DAA
	95EB	LD (HL),A
	95EC	CP $60	Sixty, in BCD, is $60.
	95EE	JR NZ,TICK_CLOCK_0	Sixty, in BCD, is $60.
	95F0	LD (HL),$00	Round the seconds and carry into the minutes.
	95F2	DEC HL	Round the seconds and carry into the minutes.
	95F3	LD A,(HL)
	95F4	INC A
	95F5	DAA
	95F6	LD (HL),A
	95F7	CP $60
	95F9	JR NZ,TICK_CLOCK_0
	95FB	LD (HL),$00
	95FD	DEC HL	And the minutes into the hours.
	95FE	LD A,(HL)
	95FF	INC A
	9600	DAA
	9601	AND $0F	Hours are kept to a single digit, which is what makes the display 000:09 rather than 00:00:09.
	9603	LD (HL),A
TICK_CLOCK_0	9604	LD HL,$40C8
This entry point is used by the routine at DRAW_SUMMARY.
PRINT_CLOCK	9607	CALL PIXEL_TO_SCREEN
	960A	LD DE,$5E3D
	960D	LD B,$02
	960F	CALL DRAW_LOW_DIGIT
	9612	LD DE,$5E3F
	9615	INC HL
	9616	LD B,$01
	9618	JP DRAW_DIGITS