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LYOverrides in main.asm

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This commit is contained in:
yenatch 2013-08-27 20:56:28 -04:00
parent 64bb7d2253
commit 651e0a4245
1 changed files with 15 additions and 19 deletions
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34
main.asm
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@ -249,11 +249,12 @@ Function547: ; 547
cp rSCX & $ff
ret nz
ld c, a
ld a, [$d100]
ld a, [LYOverrides]
ld [$ff00+c], a
ret
; 552
LCD: ; 552
push af
ld a, [hLCDStatCustom]
@ -264,7 +265,7 @@ LCD: ; 552
push bc
ld a, [rLY]
ld c, a
ld b, $d100 >> 8
ld b, LYOverrides >> 8
ld a, [bc]
ld b, a
ld a, [hLCDStatCustom]
@ -279,7 +280,6 @@ LCD: ; 552
; 568
DisableLCD: ; 568
; Turn the LCD off
@ -71398,7 +71398,7 @@ StartTitleScreen: ; 10ed67
call DrawGraphic
; Draw copyright text
ld hl, $9c03 ; BG Map 1 (3,0)
ld hl, $9c03 ; BGMap1(3,0)
ld bc, $010d ; 13x1
ld d, $c
ld e, $10
@ -71436,11 +71436,9 @@ StartTitleScreen: ; 10ed67
; LY/SCX trickery starts here
; Save WRAM bank
ld a, [rSVBK]
push af
; WRAM bank 5
ld a, 5
ld a, 5 ; BANK(LYOverrides)
ld [rSVBK], a
; Make alternating lines come in from opposite sides
@ -71448,28 +71446,27 @@ StartTitleScreen: ; 10ed67
; ( This part is actually totally pointless, you can't
; see anything until these values are overwritten! )
ld b, 40 ; alternate for 80 lines
ld hl, $d100 ; LY buffer
ld b, 80 / 2 ; alternate for 80 lines
ld hl, LYOverrides
.loop
; $00 is the middle position
ld [hl], $70 ; coming from the left
ld [hl], +112 ; coming from the left
inc hl
ld [hl], $90 ; coming from the right
ld [hl], -112 ; coming from the right
inc hl
dec b
jr nz, .loop
; Make sure the rest of the buffer is empty
ld hl, $d150
ld hl, LYOverrides + 80
xor a
ld bc, $0040
ld bc, LYOverridesEnd - (LYOverrides + 80)
call ByteFill
; Let LCD Stat know we're messing around with SCX
ld a, rSCX - rJOYP
ld [hLCDStatCustom], a
; Restore WRAM bank
pop af
ld [rSVBK], a
@ -71483,14 +71480,13 @@ StartTitleScreen: ; 10ed67
set 2, a
ld [rLCDC], a
;
ld a, $70
ld a, +112
ld [hSCX], a
ld a, $8
ld a, 8
ld [hSCY], a
ld a, $7
ld a, 7
ld [hWX], a
ld a, $90
ld a, -112
ld [hWY], a
ld a, $1