mirror of https://github.com/pret/pokecrystal.git
605 lines
9.4 KiB
NASM
605 lines
9.4 KiB
NASM
HDMATransferAttrmapAndTilemapToWRAMBank3::
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ld hl, .Function
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jp CallInSafeGFXMode
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.Function:
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decoord 0, 0, wAttrmap
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ld hl, wScratchAttrmap
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call PadAttrmapForHDMATransfer
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decoord 0, 0
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ld hl, wScratchTilemap
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call PadTilemapForHDMATransfer
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ld a, $0
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ldh [rVBK], a
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ld hl, wScratchTilemap
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call HDMATransferToWRAMBank3
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ld a, $1
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ldh [rVBK], a
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ld hl, wScratchAttrmap
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call HDMATransferToWRAMBank3
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ret
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HDMATransferTilemapToWRAMBank3::
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ld hl, .Function
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jp CallInSafeGFXMode
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.Function:
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decoord 0, 0
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ld hl, wScratchTilemap
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call PadTilemapForHDMATransfer
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ld a, $0
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ldh [rVBK], a
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ld hl, wScratchTilemap
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call HDMATransferToWRAMBank3
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ret
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HDMATransferAttrmapToWRAMBank3:
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ld hl, .Function
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jp CallInSafeGFXMode
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.Function:
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decoord 0, 0, wAttrmap
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ld hl, wScratchAttrmap
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call PadAttrmapForHDMATransfer
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ld a, $1
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ldh [rVBK], a
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ld hl, wScratchAttrmap
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call HDMATransferToWRAMBank3
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ret
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ReloadMapPart::
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ld hl, .Function
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jp CallInSafeGFXMode
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.Function:
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decoord 0, 0, wAttrmap
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ld hl, wScratchAttrmap
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call PadAttrmapForHDMATransfer
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decoord 0, 0
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ld hl, wScratchTilemap
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call PadTilemapForHDMATransfer
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call DelayFrame
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di
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ldh a, [rVBK]
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push af
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ld a, $1
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ldh [rVBK], a
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ld hl, wScratchAttrmap
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call HDMATransfer_Wait127Scanlines_toBGMap
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ld a, $0
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ldh [rVBK], a
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ld hl, wScratchTilemap
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call HDMATransfer_Wait127Scanlines_toBGMap
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pop af
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ldh [rVBK], a
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ei
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ret
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Mobile_ReloadMapPart:
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ld hl, ReloadMapPart ; useless
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ld hl, .Function
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jp CallInSafeGFXMode
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.Function:
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decoord 0, 0, wAttrmap
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ld hl, wScratchAttrmap
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call PadAttrmapForHDMATransfer
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decoord 0, 0
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ld hl, wScratchTilemap
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call PadTilemapForHDMATransfer
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call DelayFrame
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di
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ldh a, [rVBK]
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push af
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ld a, $1
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ldh [rVBK], a
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ld hl, wScratchAttrmap
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call HDMATransfer_NoDI
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ld a, $0
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ldh [rVBK], a
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ld hl, wScratchTilemap
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call HDMATransfer_NoDI
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pop af
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ldh [rVBK], a
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ei
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ret
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; unused
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ld hl, .unreferenced_1040da
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jp CallInSafeGFXMode
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.unreferenced_1040da
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ld a, $1
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ldh [rVBK], a
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ld a, BANK(w3_d800)
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ldh [rSVBK], a
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ld de, w3_d800
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ldh a, [hBGMapAddress + 1]
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ldh [rHDMA1], a
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ldh a, [hBGMapAddress]
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ldh [rHDMA2], a
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ld a, d
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ldh [rHDMA3], a
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ld a, e
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ldh [rHDMA4], a
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ld a, $23
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ldh [hDMATransfer], a
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call WaitDMATransfer
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ret
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; unused
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ld hl, .unreferenced_104101
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jp CallInSafeGFXMode
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.unreferenced_104101
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ld a, $1
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ldh [rVBK], a
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ld a, BANK(w3_d800)
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ldh [rSVBK], a
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ld hl, w3_d800
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call HDMATransferToWRAMBank3
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ret
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OpenAndCloseMenu_HDMATransferTilemapAndAttrmap::
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; OpenText
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ld hl, .Function
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jp CallInSafeGFXMode
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.Function:
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; Transfer wAttrmap and Tilemap to BGMap
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; Fill vBGAttrs with $00
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; Fill vBGTiles with " "
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decoord 0, 0, wAttrmap
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ld hl, wScratchAttrmap
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call PadAttrmapForHDMATransfer
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decoord 0, 0
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ld hl, wScratchTilemap
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call PadTilemapForHDMATransfer
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call DelayFrame
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di
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ldh a, [rVBK]
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push af
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ld a, $1
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ldh [rVBK], a
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ld hl, wScratchAttrmap
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call HDMATransfer_Wait123Scanlines_toBGMap
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ld a, $0
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ldh [rVBK], a
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ld hl, wScratchTilemap
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call HDMATransfer_Wait123Scanlines_toBGMap
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pop af
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ldh [rVBK], a
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ei
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ret
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Mobile_OpenAndCloseMenu_HDMATransferTilemapAndAttrmap:
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ld hl, .Function
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jp CallInSafeGFXMode
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.Function:
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; Transfer wAttrmap and Tilemap to BGMap
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; Fill vBGAttrs with $00
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; Fill vBGTiles with $ff
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decoord 0, 0, wAttrmap
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ld hl, wScratchAttrmap
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call PadAttrmapForHDMATransfer
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ld c, $ff
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decoord 0, 0
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ld hl, wScratchTilemap
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call PadMapForHDMATransfer
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ld a, $1
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ldh [rVBK], a
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ld hl, wScratchAttrmap
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call HDMATransfer_Wait127Scanlines_toBGMap
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ld a, $0
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ldh [rVBK], a
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ld hl, wScratchTilemap
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call HDMATransfer_Wait127Scanlines_toBGMap
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ret
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CallInSafeGFXMode:
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ldh a, [hBGMapMode]
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push af
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ldh a, [hMapAnims]
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push af
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xor a
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ldh [hBGMapMode], a
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ldh [hMapAnims], a
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ldh a, [rSVBK]
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push af
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ld a, BANK(wScratchTilemap)
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ldh [rSVBK], a
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ldh a, [rVBK]
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push af
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call ._hl_
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pop af
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ldh [rVBK], a
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pop af
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ldh [rSVBK], a
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pop af
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ldh [hMapAnims], a
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pop af
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ldh [hBGMapMode], a
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ret
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._hl_
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jp hl
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HDMATransferToWRAMBank3:
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call _LoadHDMAParameters
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ld a, $23
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ldh [hDMATransfer], a
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WaitDMATransfer:
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.loop
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call DelayFrame
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ldh a, [hDMATransfer]
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and a
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jr nz, .loop
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ret
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HDMATransfer_Wait127Scanlines_toBGMap:
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; HDMA transfer from hl to [hBGMapAddress]
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; hBGMapAddress -> de
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; 2 * SCREEN_HEIGHT -> c
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ldh a, [hBGMapAddress + 1]
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ld d, a
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ldh a, [hBGMapAddress]
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ld e, a
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ld c, 2 * SCREEN_HEIGHT
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jr HDMATransfer_Wait127Scanlines
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HDMATransfer_Wait123Scanlines_toBGMap:
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; HDMA transfer from hl to [hBGMapAddress]
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; hBGMapAddress -> de
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; 2 * SCREEN_HEIGHT -> c
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; $7b --> b
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ldh a, [hBGMapAddress + 1]
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ld d, a
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ldh a, [hBGMapAddress]
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ld e, a
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ld c, 2 * SCREEN_HEIGHT
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jr HDMATransfer_Wait123Scanlines
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HDMATransfer_NoDI:
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; HDMA transfer from hl to [hBGMapAddress]
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; [hBGMapAddress] --> de
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; 2 * SCREEN_HEIGHT --> c
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ldh a, [hBGMapAddress + 1]
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ld d, a
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ldh a, [hBGMapAddress]
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ld e, a
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ld c, 2 * SCREEN_HEIGHT
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; [rHDMA1, rHDMA2] = hl & $fff0
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ld a, h
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ldh [rHDMA1], a
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ld a, l
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and $f0
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ldh [rHDMA2], a
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; [rHDMA3, rHDMA4] = de & $1ff0
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ld a, d
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and $1f
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ldh [rHDMA3], a
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ld a, e
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and $f0
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ldh [rHDMA4], a
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; b = c | %10000000
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ld a, c
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dec c
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or $80
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ld b, a
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; d = $7f - c + 1
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ld a, $7f
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sub c
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ld d, a
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; while [rLY] >= d: pass
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.loop1
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ldh a, [rLY]
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cp d
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jr nc, .loop1
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; while not [rSTAT] & 3: pass
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.loop2
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ldh a, [rSTAT]
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and $3
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jr z, .loop2
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; load the 5th byte of HDMA
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ld a, b
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ldh [rHDMA5], a
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; wait until rLY advances (c + 1) times
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ldh a, [rLY]
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inc c
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ld hl, rLY
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.loop3
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cp [hl]
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jr z, .loop3
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ld a, [hl]
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dec c
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jr nz, .loop3
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ld hl, rHDMA5
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res 7, [hl]
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ret
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HDMATransfer_Wait123Scanlines:
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ld b, $7b
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jr _continue_HDMATransfer
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HDMATransfer_Wait127Scanlines:
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ld b, $7f
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_continue_HDMATransfer:
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; a lot of waiting around for hardware registers
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; [rHDMA1, rHDMA2] = hl & $fff0
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ld a, h
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ldh [rHDMA1], a
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ld a, l
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and $f0 ; high nybble
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ldh [rHDMA2], a
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; [rHDMA3, rHDMA4] = de & $1ff0
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ld a, d
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and $1f ; lower 5 bits
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ldh [rHDMA3], a
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ld a, e
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and $f0 ; high nybble
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ldh [rHDMA4], a
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; e = c | %10000000
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ld a, c
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dec c
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or $80
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ld e, a
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; d = b - c + 1
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ld a, b
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sub c
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ld d, a
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; while [rLY] >= d: pass
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.ly_loop
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ldh a, [rLY]
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cp d
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jr nc, .ly_loop
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di
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; while [rSTAT] & 3: pass
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.rstat_loop_1
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ldh a, [rSTAT]
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and $3
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jr nz, .rstat_loop_1
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; while not [rSTAT] & 3: pass
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.rstat_loop_2
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ldh a, [rSTAT]
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and $3
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jr z, .rstat_loop_2
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; load the 5th byte of HDMA
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ld a, e
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ldh [rHDMA5], a
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; wait until rLY advances (c + 1) times
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ldh a, [rLY]
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inc c
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ld hl, rLY
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.final_ly_loop
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cp [hl]
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jr z, .final_ly_loop
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ld a, [hl]
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dec c
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jr nz, .final_ly_loop
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ld hl, rHDMA5
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res 7, [hl]
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ei
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ret
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_LoadHDMAParameters:
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ld a, h
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ldh [rHDMA1], a
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ld a, l
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ldh [rHDMA2], a
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ldh a, [hBGMapAddress + 1]
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and $1f
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ldh [rHDMA3], a
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ldh a, [hBGMapAddress]
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ldh [rHDMA4], a
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ret
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PadTilemapForHDMATransfer:
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ld c, " "
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jr PadMapForHDMATransfer
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PadAttrmapForHDMATransfer:
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ld c, $0
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PadMapForHDMATransfer:
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; pad a 20x18 map to 32x18 for HDMA transfer
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; back up the padding value in c to hMapObjectIndexBuffer
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ldh a, [hMapObjectIndexBuffer]
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push af
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ld a, c
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ldh [hMapObjectIndexBuffer], a
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; for each row on the screen
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ld c, SCREEN_HEIGHT
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.loop1
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; for each tile in the row
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ld b, SCREEN_WIDTH
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.loop2
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; copy from de to hl
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ld a, [de]
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inc de
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ld [hli], a
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dec b
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jr nz, .loop2
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; load the original padding value of c into hl for 32 - 20 = 12 rows
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ldh a, [hMapObjectIndexBuffer]
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ld b, BG_MAP_WIDTH - SCREEN_WIDTH
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.loop3
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ld [hli], a
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dec b
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jr nz, .loop3
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dec c
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jr nz, .loop1
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; restore the original value of hMapObjectIndexBuffer
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pop af
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ldh [hMapObjectIndexBuffer], a
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ret
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_Get2bpp::
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; 2bpp when [rLCDC] & $80
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; switch to WRAM bank 6
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ldh a, [rSVBK]
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push af
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ld a, BANK(wScratchTilemap)
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ldh [rSVBK], a
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push bc
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push hl
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; Copy c tiles of the 2bpp from b:de to wScratchTilemap
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ld a, b ; bank
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ld l, c ; number of tiles
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ld h, $0
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; multiply by 16 (16 bytes of a 2bpp = 8 x 8 tile)
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add hl, hl
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add hl, hl
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add hl, hl
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add hl, hl
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ld b, h
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ld c, l
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ld h, d ; address
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ld l, e
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ld de, wScratchTilemap
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call FarCopyBytes
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pop hl
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pop bc
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push bc
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call DelayFrame
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pop bc
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ld d, h
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ld e, l
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ld hl, wScratchTilemap
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call HDMATransfer_Wait127Scanlines
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; restore the previous bank
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pop af
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ldh [rSVBK], a
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ret
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_Get1bpp::
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; 1bpp when [rLCDC] & $80
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.loop
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ld a, c
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cp $10
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jp c, .bankswitch
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jp z, .bankswitch
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push bc
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push hl
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push de
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ld c, $10
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call .bankswitch
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pop de
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ld hl, $80
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add hl, de
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ld d, h
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ld e, l
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pop hl
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lb bc, 1, 0
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add hl, bc
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pop bc
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ld a, c
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sub $10
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ld c, a
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jr .loop
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.bankswitch
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ldh a, [rSVBK]
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push af
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ld a, BANK(wScratchTilemap)
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ldh [rSVBK], a
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push bc
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push hl
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ld a, b
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ld l, c
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ld h, $0
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add hl, hl ; multiply by 8
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add hl, hl ; multiply by 8
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add hl, hl ; multiply by 8
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ld c, l
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ld b, h
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ld h, d
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ld l, e
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ld de, wScratchTilemap
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call FarCopyBytesDouble_DoubleBankSwitch
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pop hl
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pop bc
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push bc
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call DelayFrame
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pop bc
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ld d, h
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ld e, l
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ld hl, wScratchTilemap
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call HDMATransfer_Wait127Scanlines
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pop af
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ldh [rSVBK], a
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ret
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HDMATransfer_OnlyTopFourRows:
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ld hl, .Function
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jp CallInSafeGFXMode
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.Function:
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ld hl, wScratchTilemap
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decoord 0, 0
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call .Copy
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ld hl, wScratchTilemap + $80
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decoord 0, 0, wAttrmap
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call .Copy
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ld a, $1
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ldh [rVBK], a
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ld c, $8
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ld hl, wScratchTilemap + $80
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debgcoord 0, 0, vBGMap1
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call HDMATransfer_Wait127Scanlines
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ld a, $0
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ldh [rVBK], a
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ld c, $8
|
|
ld hl, wScratchTilemap
|
|
debgcoord 0, 0, vBGMap1
|
|
call HDMATransfer_Wait127Scanlines
|
|
ret
|
|
|
|
.Copy:
|
|
ld b, 4
|
|
.outer_loop
|
|
ld c, SCREEN_WIDTH
|
|
.inner_loop
|
|
ld a, [de]
|
|
ld [hli], a
|
|
inc de
|
|
dec c
|
|
jr nz, .inner_loop
|
|
ld a, l
|
|
add BG_MAP_WIDTH - SCREEN_WIDTH
|
|
ld l, a
|
|
ld a, h
|
|
adc 0
|
|
ld h, a
|
|
dec b
|
|
jr nz, .outer_loop
|
|
ret
|