2 files changed, 312 insertions, 0 deletions
diff --git a/engine/rtc/print_hours_mins.asm b/engine/rtc/print_hours_mins.asm
new file mode 100644
index 00000000..faa69756
--- /dev/null
+++ b/engine/rtc/print_hours_mins.asm
@@ -0,0 +1,76 @@
+Unreferenced_Function1c0a0d:
+	ld a, b
+	ld b, c
+	ld c, a
+	push bc
+	push de
+	ld hl, sp+$2
+	ld d, h
+	ld e, l
+	pop hl
+	lb bc, PRINTNUM_LEADINGZEROS | 2, 5
+	call PrintNum
+	pop bc
+	ret
+
+PrintHoursMins:
+; Hours in b, minutes in c
+	ld a, b
+	cp 12
+	push af
+	jr c, .AM
+	jr z, .PM
+	sub 12
+	jr .PM
+.AM:
+	or a
+	jr nz, .PM
+	ld a, 12
+.PM:
+	ld b, a
+; Crazy stuff happening with the stack
+	push bc
+	ld hl, sp+$1
+	push de
+	push hl
+	pop de
+	pop hl
+	ld [hl], " "
+	lb bc, 1, 2
+	call PrintNum
+	ld [hl], ":"
+	inc hl
+	ld d, h
+	ld e, l
+	ld hl, sp+$0
+	push de
+	push hl
+	pop de
+	pop hl
+	lb bc, PRINTNUM_LEADINGZEROS | 1, 2
+	call PrintNum
+	pop bc
+	ld de, String_AM
+	pop af
+	jr c, .place_am_pm
+	ld de, String_PM
+.place_am_pm
+	inc hl
+	call PlaceString
+	ret
+
+String_AM: db "AM@"
+String_PM: db "PM@"
+
+UpdateTimePredef::
+	call UpdateTime
+	ld hl, wDSTBackupDay
+	ld a, [wCurDay]
+	ld [hli], a ; wDSTBackupDay
+	ldh a, [hHours]
+	ld [hli], a ; wDSTBackupHours
+	ldh a, [hMinutes]
+	ld [hli], a ; wDSTBackupMinutes
+	ldh a, [hSeconds]
+	ld [hli], a ; wDSTBackupSeconds
+	ret
diff --git a/engine/rtc/restart_clock.asm b/engine/rtc/restart_clock.asm
new file mode 100644
index 00000000..5dc98718
--- /dev/null
+++ b/engine/rtc/restart_clock.asm
@@ -0,0 +1,236 @@
+RestartClock_GetWraparoundTime:
+	push hl
+	dec a
+	ld e, a
+	ld d, 0
+	ld hl, .WrapAroundTimes
+rept 4
+	add hl, de
+endr
+	ld e, [hl]
+	inc hl
+	ld d, [hl]
+	inc hl
+	ld b, [hl]
+	inc hl
+	ld c, [hl]
+	pop hl
+	ret
+
+.WrapAroundTimes:
+	dw wBuffer4
+	db 7, 4
+
+	dw wBuffer5
+	db 24, 12
+
+	dw wBuffer6
+	db 60, 15
+
+RestartClock:
+; If we're here, we had an RTC overflow.
+	ld hl, .ClockTimeMayBeWrongText
+	call PrintText
+	ld hl, wOptions
+	ld a, [hl]
+	push af
+	set NO_TEXT_SCROLL, [hl]
+	call LoadStandardMenuHeader
+	call ClearTilemap
+	ld hl, .ClockSetWithControlPadText
+	call PrintText
+	call .SetClock
+	call ExitMenu
+	pop bc
+	ld hl, wOptions
+	ld [hl], b
+	ld c, a
+	ret
+
+.ClockTimeMayBeWrongText:
+	text_far _ClockTimeMayBeWrongText
+	text_end
+
+.ClockSetWithControlPadText:
+	text_far _ClockSetWithControlPadText
+	text_end
+
+.SetClock:
+	ld a, 1
+	ld [wBuffer1], a ; which digit
+	ld [wBuffer2], a
+	ld a, 8
+	ld [wBuffer3], a
+	call UpdateTime
+	call GetWeekday
+	ld [wBuffer4], a
+	ldh a, [hHours]
+	ld [wBuffer5], a
+	ldh a, [hMinutes]
+	ld [wBuffer6], a
+
+.loop
+	call .joy_loop
+	jr nc, .loop
+	and a
+	ret nz
+	call .PrintTime
+	ld hl, .ClockIsThisOKText
+	call PrintText
+	call YesNoBox
+	jr c, .cancel
+	ld a, [wBuffer4]
+	ld [wStringBuffer2], a
+	ld a, [wBuffer5]
+	ld [wStringBuffer2 + 1], a
+	ld a, [wBuffer6]
+	ld [wStringBuffer2 + 2], a
+	xor a
+	ld [wStringBuffer2 + 3], a
+	call InitTime
+	call .PrintTime
+	ld hl, .ClockHasResetText
+	call PrintText
+	call WaitPressAorB_BlinkCursor
+	xor a
+	ret
+
+.cancel
+	ld a, $1
+	ret
+
+.ClockIsThisOKText:
+	text_far _ClockIsThisOKText
+	text_end
+
+.ClockHasResetText:
+	text_far _ClockHasResetText
+	text_end
+
+.joy_loop
+	call JoyTextDelay_ForcehJoyDown
+	ld c, a
+	push af
+	call .PrintTime
+	pop af
+	bit 0, a
+	jr nz, .press_A
+	bit 1, a
+	jr nz, .press_B
+	bit 6, a
+	jr nz, .pressed_up
+	bit 7, a
+	jr nz, .pressed_down
+	bit 5, a
+	jr nz, .pressed_left
+	bit 4, a
+	jr nz, .pressed_right
+	jr .joy_loop
+
+.press_A
+	ld a, $0
+	scf
+	ret
+
+.press_B
+	ld a, $1
+	scf
+	ret
+
+.pressed_up
+	ld a, [wBuffer1]
+	call RestartClock_GetWraparoundTime
+	ld a, [de]
+	inc a
+	ld [de], a
+	cp b
+	jr c, .done_scroll
+	ld a, $0
+	ld [de], a
+	jr .done_scroll
+
+.pressed_down
+	ld a, [wBuffer1]
+	call RestartClock_GetWraparoundTime
+	ld a, [de]
+	dec a
+	ld [de], a
+	cp -1
+	jr nz, .done_scroll
+	ld a, b
+	dec a
+	ld [de], a
+	jr .done_scroll
+
+.pressed_left
+	ld hl, wBuffer1
+	dec [hl]
+	jr nz, .done_scroll
+	ld [hl], $3
+	jr .done_scroll
+
+.pressed_right
+	ld hl, wBuffer1
+	inc [hl]
+	ld a, [hl]
+	cp $4
+	jr c, .done_scroll
+	ld [hl], $1
+
+.done_scroll
+	xor a
+	ret
+
+.PrintTime:
+	hlcoord 0, 5
+	ld b, 5
+	ld c, 18
+	call Textbox
+	decoord 1, 8
+	ld a, [wBuffer4]
+	ld b, a
+	farcall PrintDayOfWeek
+	ld a, [wBuffer5]
+	ld b, a
+	ld a, [wBuffer6]
+	ld c, a
+	decoord 11, 8
+	farcall PrintHoursMins
+	ld a, [wBuffer2]
+	lb de, " ", " "
+	call .PlaceChars
+	ld a, [wBuffer1]
+	lb de, "▲", "▼"
+	call .PlaceChars
+	ld a, [wBuffer1]
+	ld [wBuffer2], a
+	ret
+
+.unreferenced
+; unused
+	ld a, [wBuffer3]
+	ld b, a
+	call Coord2Tile
+	ret
+
+.PlaceChars:
+	push de
+	call RestartClock_GetWraparoundTime
+	ld a, [wBuffer3]
+	dec a
+	ld b, a
+	call Coord2Tile
+	pop de
+	ld [hl], d
+	ld bc, 2 * SCREEN_WIDTH
+	add hl, bc
+	ld [hl], e
+	ret
+
+UnreferencedString_HourJP:
+; unused
+	db "じ@" ; HR
+
+UnreferencedString_MinuteJP:
+; unused
+	db "ふん@" ; MIN