mirror of
https://gitlab.com/xCrystal/pokecrystal-board.git
synced 2024-09-09 09:51:34 -07:00
82 lines
951 B
NASM
82 lines
951 B
NASM
; LCD handling
|
|
|
|
|
|
Function547:: ; 547
|
|
ld a, [hLCDStatCustom]
|
|
cp rSCX & $ff
|
|
ret nz
|
|
ld c, a
|
|
ld a, [LYOverrides]
|
|
ld [$ff00+c], a
|
|
ret
|
|
; 552
|
|
|
|
|
|
LCD:: ; 552
|
|
push af
|
|
ld a, [hLCDStatCustom]
|
|
and a
|
|
jr z, .done
|
|
|
|
; At this point it's assumed we're in WRAM bank 5!
|
|
push bc
|
|
ld a, [rLY]
|
|
ld c, a
|
|
ld b, LYOverrides >> 8
|
|
ld a, [bc]
|
|
ld b, a
|
|
ld a, [hLCDStatCustom]
|
|
ld c, a
|
|
ld a, b
|
|
ld [$ff00+c], a
|
|
pop bc
|
|
|
|
.done
|
|
pop af
|
|
reti
|
|
; 568
|
|
|
|
|
|
DisableLCD:: ; 568
|
|
; Turn the LCD off
|
|
|
|
; Don't need to do anything if the LCD is already off
|
|
ld a, [rLCDC]
|
|
bit 7, a ; lcd enable
|
|
ret z
|
|
|
|
xor a
|
|
ld [rIF], a
|
|
ld a, [rIE]
|
|
ld b, a
|
|
|
|
; Disable VBlank
|
|
res 0, a ; vblank
|
|
ld [rIE], a
|
|
|
|
.wait
|
|
; Wait until VBlank would normally happen
|
|
ld a, [rLY]
|
|
cp 145
|
|
jr nz, .wait
|
|
|
|
ld a, [rLCDC]
|
|
and %01111111 ; lcd enable off
|
|
ld [rLCDC], a
|
|
|
|
xor a
|
|
ld [rIF], a
|
|
ld a, b
|
|
ld [rIE], a
|
|
ret
|
|
; 58a
|
|
|
|
|
|
EnableLCD:: ; 58a
|
|
ld a, [rLCDC]
|
|
set 7, a ; lcd enable
|
|
ld [rLCDC], a
|
|
ret
|
|
; 591
|
|
|