1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
StartTimer: ; 0x867d
; Starts the timer that counts down with the specified starting time when things
; like CatchEm Mode start.
; input: b = minutes
; c = seconds
ld a, c
ld [wTimerSeconds], a
ld a, b
ld [wTimerMinutes], a
xor a
ld [wTimerFrames], a
ld [wTimeRanOut], a
ld [wPauseTimer], a
ld a, $1
ld [wTimerActive], a
ld a, $1
ld [wd580], a
callba LoadTimerGraphics
ret
DecrementTimer: ; 0x86a4
ld a, [wPauseTimer] ;quit unless ??? is 0
and a
ret nz
ld a, [wTimerFrames]
inc a
cp 60
jr c, .IfSecondHasNotPassed ;if frames +1 >= 60, reset it
xor a
.IfSecondHasNotPassed
ld [wTimerFrames], a ;inc frames
ret c ;done if there was no reset
ld hl, wTimerMinutes
ld a, [hld]
or [hl]
jr nz, .IfTimeLeft ;if minutes or seconds is non-zero, jump, else ret marking that time ran out
ld a, $1
ld [wTimeRanOut], a
ret
.IfTimeLeft
ld a, [hl]
sub $1
daa ;take 1 from seconds
jr nc, .IfMinuteHasNotPassed ; if < 0, set to 59
ld a, $59
.IfMinuteHasNotPassed
ld [hli], a
ld a, [hl]
sbc $0 ;sub minutes by 1 only if carry is set from the seconds sub
daa
ld [hl], a
ret
StopTimer: ; 0x86d2
xor a
ld [wTimerActive], a
ret
|
