Import stuff from pokecrystal; diff gold and silver

1 files changed, 434 insertions, 0 deletions

diff --git a/home/copy.asm b/home/copy.asm
new file mode 100644
index 00000000..08eb5c10
--- /dev/null
+++ b/home/copy.asm
@@ -0,0 +1,434 @@
+; Functions to copy data from ROM.
+
+
+Get2bpp_2:: ; dc9
+	ld a, [rLCDC]
+	bit 7, a
+	jp z, Copy2bpp
+
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(_Get2bpp)
+	rst Bankswitch
+	call _Get2bpp
+	pop af
+	rst Bankswitch
+
+	ret
+; ddc
+
+Get1bpp_2:: ; ddc
+	ld a, [rLCDC]
+	bit 7, a
+	jp z, Copy1bpp
+
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(_Get1bpp)
+	rst Bankswitch
+	call _Get1bpp
+	pop af
+	rst Bankswitch
+
+	ret
+; def
+
+FarCopyBytesDouble_DoubleBankSwitch:: ; def
+	ld [hBuffer], a
+	ld a, [hROMBank]
+	push af
+	ld a, [hBuffer]
+	rst Bankswitch
+
+	call FarCopyBytesDouble
+
+	pop af
+	rst Bankswitch
+	ret
+; dfd
+
+OldDMATransfer:: ; dfd
+	dec c
+	ld a, [hBGMapMode]
+	push af
+	xor a
+	ld [hBGMapMode], a
+	ld a, [hROMBank]
+	push af
+	ld a, b
+	rst Bankswitch
+
+.loop
+; load the source and target MSB and LSB
+	ld a, d
+	ld [rHDMA1], a ; source MSB
+	ld a, e
+	and $f0
+	ld [rHDMA2], a ; source LSB
+	ld a, h
+	and $1f
+	ld [rHDMA3], a ; target MSB
+	ld a, l
+	and $f0
+	ld [rHDMA4], a ; target LSB
+; stop when c < 8
+	ld a, c
+	cp $8
+	jr c, .done
+; decrease c by 8
+	sub $8
+	ld c, a
+; DMA transfer state
+	ld a, $f
+	ld [hDMATransfer], a
+	call DelayFrame
+; add $100 to hl and de
+	ld a, l
+	add $100 % $100
+	ld l, a
+	ld a, h
+	adc $100 / $100
+	ld h, a
+	ld a, e
+	add $100 % $100
+	ld e, a
+	ld a, d
+	adc $100 / $100
+	ld d, a
+	jr .loop
+
+.done
+	ld a, c
+	and $7f ; pretty silly, considering at most bits 0-2 would be set
+	ld [hDMATransfer], a
+	call DelayFrame
+	pop af
+	rst Bankswitch
+
+	pop af
+	ld [hBGMapMode], a
+	ret
+; e4a
+
+
+
+ReplaceKrisSprite:: ; e4a
+	callba _ReplaceKrisSprite
+	ret
+; e51
+
+
+
+LoadStandardFont:: ; e51
+	callba _LoadStandardFont
+	ret
+; e58
+
+LoadFontsBattleExtra:: ; e58
+	callba _LoadFontsBattleExtra
+	ret
+; e5f
+
+
+
+LoadFontsExtra:: ; e5f
+	callba _LoadFontsExtra1
+	callba _LoadFontsExtra2
+	ret
+; e6c
+
+LoadFontsExtra2:: ; e6c
+	callba _LoadFontsExtra2
+	ret
+; e73
+
+DecompressRequest2bpp:: ; e73
+	push de
+	ld a, BANK(sScratch)
+	call GetSRAMBank
+	push bc
+
+	ld de, sScratch
+	ld a, b
+	call FarDecompress
+
+	pop bc
+	pop hl
+
+	ld de, sScratch
+	call Request2bpp
+	call CloseSRAM
+	ret
+; e8d
+
+
+
+FarCopyBytes:: ; e8d
+; copy bc bytes from a:hl to de
+
+	ld [hBuffer], a
+	ld a, [hROMBank]
+	push af
+	ld a, [hBuffer]
+	rst Bankswitch
+
+	call CopyBytes
+
+	pop af
+	rst Bankswitch
+	ret
+; 0xe9b
+
+
+FarCopyBytesDouble:: ; e9b
+; Copy bc bytes from a:hl to bc*2 bytes at de,
+; doubling each byte in the process.
+
+	ld [hBuffer], a
+	ld a, [hROMBank]
+	push af
+	ld a, [hBuffer]
+	rst Bankswitch
+
+; switcheroo, de <> hl
+	ld a, h
+	ld h, d
+	ld d, a
+	ld a, l
+	ld l, e
+	ld e, a
+
+	inc b
+	inc c
+	jr .dec
+
+.loop
+	ld a, [de]
+	inc de
+rept 2
+	ld [hli], a
+endr
+.dec
+	dec c
+	jr nz, .loop
+	dec b
+	jr nz, .loop
+
+	pop af
+	rst Bankswitch
+	ret
+; 0xeba
+
+
+Request2bpp:: ; eba
+; Load 2bpp at b:de to occupy c tiles of hl.
+	ld a, [hBGMapMode]
+	push af
+	xor a
+	ld [hBGMapMode], a
+
+	ld a, [hROMBank]
+	push af
+	ld a, b
+	rst Bankswitch
+
+	ld a, [hTilesPerCycle]
+	push af
+	ld a, $8
+	ld [hTilesPerCycle], a
+
+	ld a, [wLinkMode]
+	cp LINK_MOBILE
+	jr nz, .NotMobile
+	ld a, [hMobile]
+	and a
+	jr nz, .NotMobile
+	ld a, $6
+	ld [hTilesPerCycle], a
+
+.NotMobile
+	ld a, e
+	ld [Requested2bppSource], a
+	ld a, d
+	ld [Requested2bppSource + 1], a
+	ld a, l
+	ld [Requested2bppDest], a
+	ld a, h
+	ld [Requested2bppDest + 1], a
+.loop
+	ld a, c
+	ld hl, hTilesPerCycle
+	cp [hl]
+	jr nc, .iterate
+
+	ld [Requested2bpp], a
+.wait
+	call DelayFrame
+	ld a, [Requested2bpp]
+	and a
+	jr nz, .wait
+
+	pop af
+	ld [hTilesPerCycle], a
+
+	pop af
+	rst Bankswitch
+
+	pop af
+	ld [hBGMapMode], a
+	ret
+
+.iterate
+	ld a, [hTilesPerCycle]
+	ld [Requested2bpp], a
+
+.wait2
+	call DelayFrame
+	ld a, [Requested2bpp]
+	and a
+	jr nz, .wait2
+
+	ld a, c
+	ld hl, hTilesPerCycle
+	sub [hl]
+	ld c, a
+	jr .loop
+; f1e
+
+
+Request1bpp:: ; f1e
+; Load 1bpp at b:de to occupy c tiles of hl.
+	ld a, [hBGMapMode]
+	push af
+	xor a
+	ld [hBGMapMode], a
+
+	ld a, [hROMBank]
+	push af
+	ld a, b
+	rst Bankswitch
+
+	ld a, [hTilesPerCycle]
+	push af
+
+	ld a, $8
+	ld [hTilesPerCycle], a
+	ld a, [wLinkMode]
+	cp LINK_MOBILE
+	jr nz, .NotMobile
+	ld a, [hMobile]
+	and a
+	jr nz, .NotMobile
+	ld a, $6
+	ld [hTilesPerCycle], a
+
+.NotMobile
+	ld a, e
+	ld [Requested1bppSource], a
+	ld a, d
+	ld [Requested1bppSource + 1], a
+	ld a, l
+	ld [Requested1bppDest], a
+	ld a, h
+	ld [Requested1bppDest + 1], a
+.loop
+	ld a, c
+	ld hl, hTilesPerCycle
+	cp [hl]
+	jr nc, .iterate
+
+	ld [Requested1bpp], a
+.wait
+	call DelayFrame
+	ld a, [Requested1bpp]
+	and a
+	jr nz, .wait
+
+	pop af
+	ld [hTilesPerCycle], a
+
+	pop af
+	rst Bankswitch
+
+	pop af
+	ld [hBGMapMode], a
+	ret
+
+.iterate
+	ld a, [hTilesPerCycle]
+	ld [Requested1bpp], a
+
+.wait2
+	call DelayFrame
+	ld a, [Requested1bpp]
+	and a
+	jr nz, .wait2
+
+	ld a, c
+	ld hl, hTilesPerCycle
+	sub [hl]
+	ld c, a
+	jr .loop
+; f82
+
+
+Get2bpp:: ; f82
+	ld a, [rLCDC]
+	bit 7, a
+	jp nz, Request2bpp
+
+Copy2bpp:: ; f89
+; copy c 2bpp tiles from b:de to hl
+
+	push hl
+	ld h, d
+	ld l, e
+	pop de
+
+; bank
+	ld a, b
+
+; bc = c * $10
+	push af
+	swap c
+	ld a, $f
+	and c
+	ld b, a
+	ld a, $f0
+	and c
+	ld c, a
+	pop af
+
+	jp FarCopyBytes
+; f9d
+
+
+Get1bpp:: ; f9d
+	ld a, [rLCDC]
+	bit 7, a
+	jp nz, Request1bpp
+
+Copy1bpp:: ; fa4
+; copy c 1bpp tiles from b:de to hl
+
+	push de
+	ld d, h
+	ld e, l
+
+; bank
+	ld a, b
+
+; bc = c * $10 / 2
+	push af
+	ld h, 0
+	ld l, c
+rept 3
+	add hl, hl
+endr
+	ld b, h
+	ld c, l
+	pop af
+
+	pop hl
+	jp FarCopyBytesDouble
+; fb6