mirror of
https://gitlab.com/xCrystal/pokecrystal-board.git
synced 2024-11-16 11:27:33 -08:00
312 lines
3.9 KiB
NASM
312 lines
3.9 KiB
NASM
; Functions relating to the timer interrupt and the real-time-clock.
|
|
|
|
|
|
AskTimer: ; 591
|
|
push af
|
|
ld a, [$ffe9]
|
|
and a
|
|
jr z, .asm_59a
|
|
call Timer
|
|
|
|
.asm_59a
|
|
pop af
|
|
reti
|
|
; 59c
|
|
|
|
|
|
LatchClock: ; 59c
|
|
; latch clock counter data
|
|
ld a, 0
|
|
ld [MBC3LatchClock], a
|
|
ld a, 1
|
|
ld [MBC3LatchClock], a
|
|
ret
|
|
; 5a7
|
|
|
|
|
|
UpdateTime: ; 5a7
|
|
call GetClock
|
|
call FixDays
|
|
call FixTime
|
|
callba GetTimeOfDay
|
|
ret
|
|
; 5b7
|
|
|
|
|
|
GetClock: ; 5b7
|
|
; store clock data in hRTCDayHi-hRTCSeconds
|
|
|
|
; enable clock r/w
|
|
ld a, SRAM_ENABLE
|
|
ld [MBC3SRamEnable], a
|
|
|
|
; clock data is 'backwards' in hram
|
|
|
|
call LatchClock
|
|
ld hl, MBC3SRamBank
|
|
ld de, MBC3RTC
|
|
|
|
ld [hl], RTC_S
|
|
ld a, [de]
|
|
and $3f
|
|
ld [hRTCSeconds], a
|
|
|
|
ld [hl], RTC_M
|
|
ld a, [de]
|
|
and $3f
|
|
ld [hRTCMinutes], a
|
|
|
|
ld [hl], RTC_H
|
|
ld a, [de]
|
|
and $1f
|
|
ld [hRTCHours], a
|
|
|
|
ld [hl], RTC_DL
|
|
ld a, [de]
|
|
ld [hRTCDayLo], a
|
|
|
|
ld [hl], RTC_DH
|
|
ld a, [de]
|
|
ld [hRTCDayHi], a
|
|
|
|
; unlatch clock / disable clock r/w
|
|
call CloseSRAM
|
|
ret
|
|
; 5e8
|
|
|
|
|
|
FixDays: ; 5e8
|
|
; fix day count
|
|
; mod by 140
|
|
|
|
; check if day count > 255 (bit 8 set)
|
|
ld a, [hRTCDayHi] ; DH
|
|
bit 0, a
|
|
jr z, .daylo
|
|
; reset dh (bit 8)
|
|
res 0, a
|
|
ld [hRTCDayHi], a ; DH
|
|
|
|
; mod 140
|
|
; mod twice since bit 8 (DH) was set
|
|
ld a, [hRTCDayLo] ; DL
|
|
.modh
|
|
sub 140
|
|
jr nc, .modh
|
|
.modl
|
|
sub 140
|
|
jr nc, .modl
|
|
add 140
|
|
|
|
; update dl
|
|
ld [hRTCDayLo], a ; DL
|
|
|
|
; unknown output
|
|
ld a, $40 ; %1000000
|
|
jr .set
|
|
|
|
.daylo
|
|
; quit if fewer than 140 days have passed
|
|
ld a, [hRTCDayLo] ; DL
|
|
cp 140
|
|
jr c, .quit
|
|
|
|
; mod 140
|
|
.mod
|
|
sub 140
|
|
jr nc, .mod
|
|
add 140
|
|
|
|
; update dl
|
|
ld [hRTCDayLo], a ; DL
|
|
|
|
; unknown output
|
|
ld a, $20 ; %100000
|
|
|
|
.set
|
|
; update clock with modded day value
|
|
push af
|
|
call SetClock
|
|
pop af
|
|
scf
|
|
ret
|
|
|
|
.quit
|
|
xor a
|
|
ret
|
|
; 61d
|
|
|
|
|
|
FixTime: ; 61d
|
|
; add ingame time (set at newgame) to current time
|
|
; day hr min sec
|
|
; store time in CurDay, hHours, hMinutes, hSeconds
|
|
|
|
; second
|
|
ld a, [hRTCSeconds] ; S
|
|
ld c, a
|
|
ld a, [StartSecond]
|
|
add c
|
|
sub 60
|
|
jr nc, .updatesec
|
|
add 60
|
|
.updatesec
|
|
ld [hSeconds], a
|
|
|
|
; minute
|
|
ccf ; carry is set, so turn it off
|
|
ld a, [hRTCMinutes] ; M
|
|
ld c, a
|
|
ld a, [StartMinute]
|
|
adc c
|
|
sub 60
|
|
jr nc, .updatemin
|
|
add 60
|
|
.updatemin
|
|
ld [hMinutes], a
|
|
|
|
; hour
|
|
ccf ; carry is set, so turn it off
|
|
ld a, [hRTCHours] ; H
|
|
ld c, a
|
|
ld a, [StartHour]
|
|
adc c
|
|
sub 24
|
|
jr nc, .updatehr
|
|
add 24
|
|
.updatehr
|
|
ld [hHours], a
|
|
|
|
; day
|
|
ccf ; carry is set, so turn it off
|
|
ld a, [hRTCDayLo] ; DL
|
|
ld c, a
|
|
ld a, [StartDay]
|
|
adc c
|
|
ld [CurDay], a
|
|
ret
|
|
; 658
|
|
|
|
Function658: ; 658
|
|
xor a
|
|
ld [StringBuffer2], a
|
|
ld a, $0
|
|
ld [$d089], a
|
|
jr .asm_677
|
|
|
|
call UpdateTime
|
|
ld a, [hHours]
|
|
ld [$d087], a
|
|
ld a, [hMinutes]
|
|
ld [$d088], a
|
|
ld a, [hSeconds]
|
|
ld [$d089], a
|
|
jr .asm_677
|
|
|
|
.asm_677
|
|
ld a, $5
|
|
ld hl, $40ed
|
|
rst FarCall
|
|
ret
|
|
; 67e
|
|
|
|
|
|
|
|
Function67e: ; 67e
|
|
call Function685
|
|
call SetClock
|
|
ret
|
|
; 685
|
|
|
|
Function685: ; 685
|
|
xor a
|
|
ld [hRTCSeconds], a
|
|
ld [hRTCMinutes], a
|
|
ld [hRTCHours], a
|
|
ld [hRTCDayLo], a
|
|
ld [hRTCDayHi], a
|
|
ret
|
|
; 691
|
|
|
|
|
|
SetClock: ; 691
|
|
; set clock data from hram
|
|
|
|
; enable clock r/w
|
|
ld a, SRAM_ENABLE
|
|
ld [MBC3SRamEnable], a
|
|
|
|
; set clock data
|
|
; stored 'backwards' in hram
|
|
|
|
call LatchClock
|
|
ld hl, MBC3SRamBank
|
|
ld de, MBC3RTC
|
|
|
|
; seems to be a halt check that got partially commented out
|
|
; this block is totally pointless
|
|
ld [hl], RTC_DH
|
|
ld a, [de]
|
|
bit 6, a ; halt
|
|
ld [de], a
|
|
|
|
; seconds
|
|
ld [hl], RTC_S
|
|
ld a, [hRTCSeconds]
|
|
ld [de], a
|
|
; minutes
|
|
ld [hl], RTC_M
|
|
ld a, [hRTCMinutes]
|
|
ld [de], a
|
|
; hours
|
|
ld [hl], RTC_H
|
|
ld a, [hRTCHours]
|
|
ld [de], a
|
|
; day lo
|
|
ld [hl], RTC_DL
|
|
ld a, [hRTCDayLo]
|
|
ld [de], a
|
|
; day hi
|
|
ld [hl], RTC_DH
|
|
ld a, [hRTCDayHi]
|
|
res 6, a ; make sure timer is active
|
|
ld [de], a
|
|
|
|
; cleanup
|
|
call CloseSRAM ; unlatch clock, disable clock r/w
|
|
ret
|
|
; 6c4
|
|
|
|
|
|
Function6c4: ; 6c4
|
|
xor a
|
|
push af
|
|
ld a, $0
|
|
call GetSRAMBank
|
|
pop af
|
|
ld [$ac60], a
|
|
call CloseSRAM
|
|
ret
|
|
; 6d3
|
|
|
|
Function6d3: ; 6d3
|
|
ld hl, $ac60
|
|
push af
|
|
ld a, $0
|
|
call GetSRAMBank
|
|
pop af
|
|
or [hl]
|
|
ld [hl], a
|
|
call CloseSRAM
|
|
ret
|
|
; 6e3
|
|
|
|
Function6e3: ; 6e3
|
|
ld a, $0
|
|
call GetSRAMBank
|
|
ld a, [$ac60]
|
|
call CloseSRAM
|
|
ret
|
|
; 6ef
|
|
|