pokered/home/vblank.asm

VBlank::

	push af
	push bc
	push de
	push hl

	ldh a, [hLoadedROMBank]
	ld [wVBlankSavedROMBank], a

	ldh a, [hSCX]
	ldh [rSCX], a
	ldh a, [hSCY]
	ldh [rSCY], a

	ld a, [wDisableVBlankWYUpdate]
	and a
	jr nz, .ok
	ldh a, [hWY]
	ldh [rWY], a
.ok

	call AutoBgMapTransfer
	call VBlankCopyBgMap
	call RedrawRowOrColumn
	call VBlankCopy
	call VBlankCopyDouble
	call UpdateMovingBgTiles
	call hDMARoutine
	ld a, BANK(PrepareOAMData)
	ldh [hLoadedROMBank], a
	ld [MBC1RomBank], a
	call PrepareOAMData

	; VBlank-sensitive operations end.

	call Random

	ldh a, [hVBlankOccurred]
	and a
	jr z, .skipZeroing
	xor a
	ldh [hVBlankOccurred], a

.skipZeroing
	ldh a, [hFrameCounter]
	and a
	jr z, .skipDec
	dec a
	ldh [hFrameCounter], a

.skipDec
	call FadeOutAudio

	ld a, [wAudioROMBank] ; music ROM bank
	ldh [hLoadedROMBank], a
	ld [MBC1RomBank], a

	cp BANK(Audio1_UpdateMusic)
	jr nz, .checkForAudio2
.audio1
	call Audio1_UpdateMusic
	jr .afterMusic
.checkForAudio2
	cp BANK(Audio2_UpdateMusic)
	jr nz, .audio3
.audio2
	call Music_DoLowHealthAlarm
	call Audio2_UpdateMusic
	jr .afterMusic
.audio3
	call Audio3_UpdateMusic
.afterMusic

	farcall TrackPlayTime ; keep track of time played

	ldh a, [hDisableJoypadPolling]
	and a
	call z, ReadJoypad

	ld a, [wVBlankSavedROMBank]
	ldh [hLoadedROMBank], a
	ld [MBC1RomBank], a

	pop hl
	pop de
	pop bc
	pop af
	reti


DelayFrame::
; Wait for the next vblank interrupt.
; As a bonus, this saves battery.

DEF NOT_VBLANKED EQU 1

	ld a, NOT_VBLANKED
	ldh [hVBlankOccurred], a
.halt
	halt
	ldh a, [hVBlankOccurred]
	and a
	jr nz, .halt
	ret
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`VBlank::`

			`push af`
			`push bc`
			`push de`
			`push hl`

Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh a, [hLoadedROMBank]`
more naming variables 2015-07-25 03:27:59 +00:00			`ld [wVBlankSavedROMBank], a`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh a, [hSCX]`
			`ldh [rSCX], a`
			`ldh a, [hSCY]`
			`ldh [rSCY], a`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00
shake screen functions 2015-07-12 23:24:03 +00:00			`ld a, [wDisableVBlankWYUpdate]`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`and a`
			`jr nz, .ok`
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh a, [hWY]`
			`ldh [rWY], a`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`.ok`

			`call AutoBgMapTransfer`
			`call VBlankCopyBgMap`
add border constant and clear up misnomer 2015-08-14 09:46:12 +00:00			`call RedrawRowOrColumn`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`call VBlankCopy`
			`call VBlankCopyDouble`
			`call UpdateMovingBgTiles`
Replace raw hex values with HRAM constants To do: turn constants into labels and use ldh 2020-07-04 02:11:35 +00:00			`call hDMARoutine`
sync home 2016-06-12 18:35:21 +00:00			`ld a, BANK(PrepareOAMData)`
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh [hLoadedROMBank], a`
Commented/labelled misc functions 2014-09-14 18:29:18 +00:00			`ld [MBC1RomBank], a`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`call PrepareOAMData`

			`; VBlank-sensitive operations end.`

			`call Random`

Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh a, [hVBlankOccurred]`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`and a`
commented audio code 2015-08-09 05:32:44 +00:00			`jr z, .skipZeroing`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`xor a`
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh [hVBlankOccurred], a`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00
commented audio code 2015-08-09 05:32:44 +00:00			`.skipZeroing`
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh a, [hFrameCounter]`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`and a`
commented audio code 2015-08-09 05:32:44 +00:00			`jr z, .skipDec`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`dec a`
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh [hFrameCounter], a`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00
commented audio code 2015-08-09 05:32:44 +00:00			`.skipDec`
			`call FadeOutAudio`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00
commented audio code 2015-08-09 05:32:44 +00:00			`ld a, [wAudioROMBank] ; music ROM bank`
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh [hLoadedROMBank], a`
Commented/labelled misc functions 2014-09-14 18:29:18 +00:00			`ld [MBC1RomBank], a`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00
Unify audio bank references 2→1 8→2 1f→3 2015-07-22 15:22:46 +00:00			`cp BANK(Audio1_UpdateMusic)`
			`jr nz, .checkForAudio2`
			`.audio1`
			`call Audio1_UpdateMusic`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`jr .afterMusic`
Unify audio bank references 2→1 8→2 1f→3 2015-07-22 15:22:46 +00:00			`.checkForAudio2`
			`cp BANK(Audio2_UpdateMusic)`
			`jr nz, .audio3`
			`.audio2`
$U-Daniel-PC\Daniel$ Low health alarm documentation RenaKunisaki 2015-03-12 14:49:35 +00:00			`call Music_DoLowHealthAlarm`
Unify audio bank references 2→1 8→2 1f→3 2015-07-22 15:22:46 +00:00			`call Audio2_UpdateMusic`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`jr .afterMusic`
Unify audio bank references 2→1 8→2 1f→3 2015-07-22 15:22:46 +00:00			`.audio3`
			`call Audio3_UpdateMusic`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`.afterMusic`

callba/callab -> farcall/callfar; jpba/jpab -> farjp/jpfar 2020-07-07 01:18:22 +00:00			`farcall TrackPlayTime ; keep track of time played`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh a, [hDisableJoypadPolling]`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`and a`
			`call z, ReadJoypad`

more naming variables 2015-07-25 03:27:59 +00:00			`ld a, [wVBlankSavedROMBank]`
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh [hLoadedROMBank], a`
Commented/labelled misc functions 2014-09-14 18:29:18 +00:00			`ld [MBC1RomBank], a`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00
			`pop hl`
			`pop de`
			`pop bc`
			`pop af`
			`reti`


			`DelayFrame::`
			`; Wait for the next vblank interrupt.`
			`; As a bonus, this saves battery.`

RGBDS syntax updates (#358) New MACRO and DEF syntax 2022-06-06 21:25:31 +00:00			`DEF NOT_VBLANKED EQU 1`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00
			`ld a, NOT_VBLANKED`
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh [hVBlankOccurred], a`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`.halt`
			`halt`
Specify the ldh instruction, don't turn ld into ldh 2020-07-06 23:03:05 +00:00			`ldh a, [hVBlankOccurred]`
Split more code out of home.asm. 2014-05-31 08:22:15 +00:00			`and a`
			`jr nz, .halt`
			`ret`