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80 lines
1.0 KiB
NASM
80 lines
1.0 KiB
NASM
INCLUDE "constants.asm"
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SECTION "home/lcd.asm", ROM0
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LCD:: ; 03ae
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push af
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ldh a, [hLCDCPointer]
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and a
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jr z, .done
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push hl
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rla
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jr c, .try_hide_sprites
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ld a, [rLY]
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ld l, a
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ld h, HIGH(wLYOverrides)
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ld h, [hl]
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ldh a, [hLCDCPointer]
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ld l, a
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ld a, h
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ld h, $FF
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ld [hl], a
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pop hl
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pop af
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reti
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.try_hide_sprites
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ld a, [rLY]
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cp $80
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jr nz, .dont_hide
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ld hl, rLCDC
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res 1, [hl]
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.dont_hide
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pop hl
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pop af
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reti
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; Seems unused?
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ldh a, [hSCX]
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ld [rSCX], a
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ldh a, [hSCY]
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ld [rSCY], a
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pop hl
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.done
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pop af
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reti
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; 0:3e1
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; TODO: can this be done using `sine_table`?
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db 0, 1, 2, 2, 3, 3, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 0, -1, -2, -2, -3, -3, -4, -4, -4, -4, -4, -3, -3, -2, -2, -1
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DisableLCD:: ; 0401
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ld a, [rLCDC]
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bit 7, a
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ret z
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xor a
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ld [rIF], a
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ld a, [rIE]
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ld b, a
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res 0, a
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ld [rIE], a
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.wait
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ld a, [rLY]
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cp LY_VBLANK + 1
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jr nz, .wait
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ld a, [rLCDC]
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and $7f ; Shut LCD down
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ld [rLCDC], a
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xor a
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ld [rIF], a
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ld a, b
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ld [rIE], a
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ret
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EnableLCD:: ; 0423
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ld a, [rLCDC]
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set 7, a
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ld [rLCDC], a
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ret |