pokecrystal-board/engine/init_map.asm

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ReanchorBGMap_NoOAMUpdate:: ; 6454
call DelayFrame
ld a, [hOAMUpdate]
push af
ld a, $1
ld [hOAMUpdate], a
ld a, [hBGMapMode]
push af
xor a
ld [hBGMapMode], a
call .ReanchorBGMap
pop af
ld [hBGMapMode], a
pop af
ld [hOAMUpdate], a
ld hl, VramState
set 6, [hl]
ret
.ReanchorBGMap:
xor a
ld [hLCDCPointer], a
ld [hBGMapMode], a
ld a, $90
ld [hWY], a
call OverworldTextModeSwitch
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ld a, HIGH(vBGMap1)
call .LoadBGMapAddrIntoHRAM
call _OpenAndCloseMenu_HDMATransferTileMapAndAttrMap
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farcall LoadOW_BGPal7
farcall ApplyPals
ld a, $1
ld [hCGBPalUpdate], a
xor a
ld [hBGMapMode], a
ld [hWY], a
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farcall HDMATransfer_FillBGMap0WithBlack ; no need to farcall
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ld a, HIGH(vBGMap0)
call .LoadBGMapAddrIntoHRAM
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xor a ; LOW(vBGMap0)
ld [wBGMapAnchor], a
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ld a, HIGH(vBGMap0)
ld [wBGMapAnchor + 1], a
xor a
ld [hSCX], a
ld [hSCY], a
call ApplyBGMapAnchorToObjects
ret
.LoadBGMapAddrIntoHRAM: ; 64b9
ld [hBGMapAddress + 1], a
xor a
ld [hBGMapAddress], a
ret
LoadFonts_NoOAMUpdate:: ; 64bf
ld a, [hOAMUpdate]
push af
ld a, $1
ld [hOAMUpdate], a
call .LoadGFX
pop af
ld [hOAMUpdate], a
ret
.LoadGFX:
call LoadFontsExtra
ld a, $90
ld [hWY], a
call SafeUpdateSprites
call LoadStandardFont
ret
HDMATransfer_FillBGMap0WithBlack: ; 64db
ld a, [rSVBK]
push af
ld a, $6
ld [rSVBK], a
ld a, "<BLACK>" ; $60
ld hl, wDecompressScratch
ld bc, wScratchAttrMap - wDecompressScratch
call ByteFill
ld a, HIGH(wDecompressScratch)
ld [rHDMA1], a
ld a, LOW(wDecompressScratch)
ld [rHDMA2], a
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ld a, HIGH(vBGMap0 % $8000)
ld [rHDMA3], a
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ld a, LOW(vBGMap0 % $8000)
ld [rHDMA4], a
ld a, $3f
ld [hDMATransfer], a
call DelayFrame
pop af
ld [rSVBK], a
ret