pokecrystal-board/engine/overworld/init_map.asm

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ReanchorBGMap_NoOAMUpdate::
call DelayFrame
ldh a, [hOAMUpdate]
push af
ld a, $1
ldh [hOAMUpdate], a
ldh a, [hBGMapMode]
push af
xor a
ldh [hBGMapMode], a
call .ReanchorBGMap
pop af
ldh [hBGMapMode], a
pop af
ldh [hOAMUpdate], a
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ld hl, wVramState
set 6, [hl]
ret
.ReanchorBGMap:
xor a
ldh [hLCDCPointer], a
ldh [hBGMapMode], a
ld a, $90
ldh [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
ldh [hCGBPalUpdate], a
xor a
ldh [hBGMapMode], a
ldh [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
ldh [hSCX], a
ldh [hSCY], a
call ApplyBGMapAnchorToObjects
ret
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.LoadBGMapAddrIntoHRAM:
ldh [hBGMapAddress + 1], a
xor a
ldh [hBGMapAddress], a
ret
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LoadFonts_NoOAMUpdate::
ldh a, [hOAMUpdate]
push af
ld a, $1
ldh [hOAMUpdate], a
call .LoadGFX
pop af
ldh [hOAMUpdate], a
ret
.LoadGFX:
call LoadFontsExtra
ld a, $90
ldh [hWY], a
call SafeUpdateSprites
call LoadStandardFont
ret
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HDMATransfer_FillBGMap0WithBlack:
ldh a, [rSVBK]
push af
ld a, BANK(wDecompressScratch)
ldh [rSVBK], a
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ld a, "■"
ld hl, wDecompressScratch
ld bc, wScratchAttrMap - wDecompressScratch
call ByteFill
ld a, HIGH(wDecompressScratch)
ldh [rHDMA1], a
ld a, LOW(wDecompressScratch)
ldh [rHDMA2], a
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ld a, HIGH(vBGMap0 - VRAM_Begin)
ldh [rHDMA3], a
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ld a, LOW(vBGMap0 - VRAM_Begin)
ldh [rHDMA4], a
ld a, $3f
ldh [hDMATransfer], a
call DelayFrame
pop af
ldh [rSVBK], a
ret