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Diffstat (limited to 'engine/time.asm')
| -rw-r--r-- | engine/time.asm | 311 |
1 files changed, 0 insertions, 311 deletions
diff --git a/engine/time.asm b/engine/time.asm deleted file mode 100644 index fff52b173..000000000 --- a/engine/time.asm +++ /dev/null @@ -1,311 +0,0 @@ -; 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 - |