1 files changed, 708 insertions, 0 deletions
diff --git a/en/engine/save.asm b/en/engine/save.asm
new file mode 100755
index 00000000..97935dbb
--- /dev/null
+++ b/en/engine/save.asm
@@ -0,0 +1,708 @@
+LoadSAV:
+;(if carry -> write
+;"the file data is destroyed")
+	call ClearScreen
+	call LoadFontTilePatterns
+	call LoadTextBoxTilePatterns
+	call LoadSAV0
+	jr c, .badsum
+	call LoadSAV1
+	jr c, .badsum
+	call LoadSAV2
+	jr c, .badsum
+	ld a, $2 ; good checksum
+	jr .goodsum
+.badsum
+	ld hl, wd730
+	push hl
+	set 6, [hl]
+	ld hl, FileDataDestroyedText
+	call PrintText
+	ld c, 100
+	call DelayFrames
+	pop hl
+	res 6, [hl]
+	ld a, $1 ; bad checksum
+.goodsum
+	ld [wSaveFileStatus], a
+	ret
+
+FileDataDestroyedText:
+	TX_FAR _FileDataDestroyedText
+	db "@"
+
+LoadSAV0:
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamBank], a
+	ld hl, sPlayerName ; hero name located in SRAM
+	ld bc, sMainDataCheckSum - sPlayerName ; but here checks the full SAV
+	call SAVCheckSum
+	ld c, a
+	ld a, [sMainDataCheckSum] ; SAV's checksum
+	cp c
+	jp z, .checkSumsMatched
+
+; If the computed checksum didn't match the saved on, try again.
+	ld hl, sPlayerName
+	ld bc, sMainDataCheckSum - sPlayerName
+	call SAVCheckSum
+	ld c, a
+	ld a, [sMainDataCheckSum] ; SAV's checksum
+	cp c
+	jp nz, SAVBadCheckSum
+
+.checkSumsMatched
+	ld hl, sPlayerName
+	ld de, wPlayerName
+	ld bc, NAME_LENGTH
+	call CopyData
+	ld hl, sMainData
+	ld de, wMainDataStart
+	ld bc, wMainDataEnd - wMainDataStart
+	call CopyData
+	ld hl, wCurMapTileset
+	set 7, [hl]
+	ld hl, sSpriteData
+	ld de, wSpriteDataStart
+	ld bc, wSpriteDataEnd - wSpriteDataStart
+	call CopyData
+	ld a, [sTilesetType]
+	ld [hTilesetType], a
+	ld hl, sCurBoxData
+	ld de, wBoxDataStart
+	ld bc, wBoxDataEnd - wBoxDataStart
+	call CopyData
+	and a
+	jp SAVGoodChecksum
+
+LoadSAV1:
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamBank], a
+	ld hl, sPlayerName ; hero name located in SRAM
+	ld bc, sMainDataCheckSum - sPlayerName  ; but here checks the full SAV
+	call SAVCheckSum
+	ld c, a
+	ld a, [sMainDataCheckSum] ; SAV's checksum
+	cp c
+	jr nz, SAVBadCheckSum
+	ld hl, sCurBoxData
+	ld de, wBoxDataStart
+	ld bc, wBoxDataEnd - wBoxDataStart
+	call CopyData
+	and a
+	jp SAVGoodChecksum
+
+LoadSAV2:
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamBank], a
+	ld hl, sPlayerName ; hero name located in SRAM
+	ld bc, sMainDataCheckSum - sPlayerName  ; but here checks the full SAV
+	call SAVCheckSum
+	ld c, a
+	ld a, [sMainDataCheckSum] ; SAV's checksum
+	cp c
+	jp nz, SAVBadCheckSum
+	ld hl, sPartyData
+	ld de, wPartyDataStart
+	ld bc, wPartyDataEnd - wPartyDataStart
+	call CopyData
+	ld hl, sMainData
+	ld de, wPokedexOwned
+	ld bc, wPokedexSeenEnd - wPokedexOwned
+	call CopyData
+	and a
+	jp SAVGoodChecksum
+
+SAVBadCheckSum:
+	scf
+
+SAVGoodChecksum:
+	ld a, $0
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	ret
+
+LoadSAVIgnoreBadCheckSum:
+; unused function that loads save data and ignores bad checksums
+	call LoadSAV0
+	call LoadSAV1
+	jp LoadSAV2
+
+SaveSAV:
+	callba PrintSaveScreenText
+	ld hl, WouldYouLikeToSaveText
+	call SaveSAVConfirm
+	and a   ;|0 = Yes|1 = No|
+	ret nz
+	ld a, [wSaveFileStatus]
+	dec a
+	jr z, .save
+	call SAVCheckRandomID
+	jr z, .save
+	ld hl, OlderFileWillBeErasedText
+	call SaveSAVConfirm
+	and a
+	ret nz
+.save
+	call SaveSAVtoSRAM
+	coord hl, 1, 13
+	lb bc, 4, 18
+	call ClearScreenArea
+	coord hl, 1, 14
+	ld de, NowSavingString
+	call PlaceString
+	ld c, 120
+	call DelayFrames
+	ld hl, GameSavedText
+	call PrintText
+	ld a, SFX_SAVE
+	call PlaySoundWaitForCurrent
+	call WaitForSoundToFinish
+	ld c, 30
+	jp DelayFrames
+
+NowSavingString:
+	db "Now saving...@"
+
+SaveSAVConfirm:
+	call PrintText
+	coord hl, 0, 7
+	lb bc, 8, 1
+	ld a, TWO_OPTION_MENU
+	ld [wTextBoxID], a
+	call DisplayTextBoxID ; yes/no menu
+	ld a, [wCurrentMenuItem]
+	ret
+
+WouldYouLikeToSaveText:
+	TX_FAR _WouldYouLikeToSaveText
+	db "@"
+
+GameSavedText:
+	TX_FAR _GameSavedText
+	db "@"
+
+OlderFileWillBeErasedText:
+	TX_FAR _OlderFileWillBeErasedText
+	db "@"
+
+SaveSAVtoSRAM0:
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamBank], a
+	ld hl, wPlayerName
+	ld de, sPlayerName
+	ld bc, NAME_LENGTH
+	call CopyData
+	ld hl, wMainDataStart
+	ld de, sMainData
+	ld bc, wMainDataEnd - wMainDataStart
+	call CopyData
+	ld hl, wSpriteDataStart
+	ld de, sSpriteData
+	ld bc, wSpriteDataEnd - wSpriteDataStart
+	call CopyData
+	ld hl, wBoxDataStart
+	ld de, sCurBoxData
+	ld bc, wBoxDataEnd - wBoxDataStart
+	call CopyData
+	ld a, [hTilesetType]
+	ld [sTilesetType], a
+	ld hl, sPlayerName
+	ld bc, sMainDataCheckSum - sPlayerName
+	call SAVCheckSum
+	ld [sMainDataCheckSum], a
+	xor a
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	ret
+
+SaveSAVtoSRAM1:
+; stored pokémon
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamBank], a
+	ld hl, wBoxDataStart
+	ld de, sCurBoxData
+	ld bc, wBoxDataEnd - wBoxDataStart
+	call CopyData
+	ld hl, sPlayerName
+	ld bc, sMainDataCheckSum - sPlayerName
+	call SAVCheckSum
+	ld [sMainDataCheckSum], a
+	xor a
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	ret
+
+SaveSAVtoSRAM2:
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamBank], a
+	ld hl, wPartyDataStart
+	ld de, sPartyData
+	ld bc, wPartyDataEnd - wPartyDataStart
+	call CopyData
+	ld hl, wPokedexOwned ; pokédex only
+	ld de, sMainData
+	ld bc, wPokedexSeenEnd - wPokedexOwned
+	call CopyData
+	ld hl, sPlayerName
+	ld bc, sMainDataCheckSum - sPlayerName
+	call SAVCheckSum
+	ld [sMainDataCheckSum], a
+	xor a
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	ret
+
+SaveSAVtoSRAM:
+	ld a, $2
+	ld [wSaveFileStatus], a
+	call SaveSAVtoSRAM0
+	call SaveSAVtoSRAM1
+	jp SaveSAVtoSRAM2
+
+SAVCheckSum:
+;Check Sum (result[1 byte] is complemented)
+	ld d, 0
+.loop
+	ld a, [hli]
+	add d
+	ld d, a
+	dec bc
+	ld a, b
+	or c
+	jr nz, .loop
+	ld a, d
+	cpl
+	ret
+
+CalcIndividualBoxCheckSums:
+	ld hl, sBox1 ; sBox7
+	ld de, sBank2IndividualBoxChecksums ; sBank3IndividualBoxChecksums
+	ld b, NUM_BOXES / 2
+.loop
+	push bc
+	push de
+	ld bc, wBoxDataEnd - wBoxDataStart
+	call SAVCheckSum
+	pop de
+	ld [de], a
+	inc de
+	pop bc
+	dec b
+	jr nz, .loop
+	ret
+
+GetBoxSRAMLocation:
+; in: a = box num
+; out: b = box SRAM bank, hl = pointer to start of box
+	ld hl, BoxSRAMPointerTable
+	ld a, [wCurrentBoxNum]
+	and $7f
+	cp NUM_BOXES / 2
+	ld b, 2
+	jr c, .next
+	inc b
+	sub NUM_BOXES / 2
+.next
+	ld e, a
+	ld d, 0
+	add hl, de
+	add hl, de
+	ld a, [hli]
+	ld h, [hl]
+	ld l, a
+	ret
+
+BoxSRAMPointerTable:
+	dw sBox1 ; sBox7
+	dw sBox2 ; sBox8
+	dw sBox3 ; sBox9
+	dw sBox4 ; sBox10
+	dw sBox5 ; sBox11
+	dw sBox6 ; sBox12
+
+ChangeBox::
+	ld hl, WhenYouChangeBoxText
+	call PrintText
+	call YesNoChoice
+	ld a, [wCurrentMenuItem]
+	and a
+	ret nz ; return if No was chosen
+	ld hl, wCurrentBoxNum
+	bit 7, [hl] ; is it the first time player is changing the box?
+	call z, EmptyAllSRAMBoxes ; if so, empty all boxes in SRAM
+	call DisplayChangeBoxMenu
+	call UpdateSprites
+	ld hl, hFlags_0xFFF6
+	set 1, [hl]
+	call HandleMenuInput
+	ld hl, hFlags_0xFFF6
+	res 1, [hl]
+	bit 1, a ; pressed b
+	ret nz
+	call GetBoxSRAMLocation
+	ld e, l
+	ld d, h
+	ld hl, wBoxDataStart
+	call CopyBoxToOrFromSRAM ; copy old box from WRAM to SRAM
+	ld a, [wCurrentMenuItem]
+	set 7, a
+	ld [wCurrentBoxNum], a
+	call GetBoxSRAMLocation
+	ld de, wBoxDataStart
+	call CopyBoxToOrFromSRAM ; copy new box from SRAM to WRAM
+	ld hl, wMapTextPtr
+	ld de, wChangeBoxSavedMapTextPointer
+	ld a, [hli]
+	ld [de], a
+	inc de
+	ld a, [hl]
+	ld [de], a
+	call RestoreMapTextPointer
+	call SaveSAVtoSRAM
+	ld hl, wChangeBoxSavedMapTextPointer
+	call SetMapTextPointer
+	ld a, SFX_SAVE
+	call PlaySoundWaitForCurrent
+	call WaitForSoundToFinish
+	ret
+
+WhenYouChangeBoxText:
+	TX_FAR _WhenYouChangeBoxText
+	db "@"
+
+CopyBoxToOrFromSRAM:
+; copy an entire box from hl to de with b as the SRAM bank
+	push hl
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	ld a, b
+	ld [MBC1SRamBank], a
+	ld bc, wBoxDataEnd - wBoxDataStart
+	call CopyData
+	pop hl
+
+; mark the memory that the box was copied from as am empty box
+	xor a
+	ld [hli], a
+	dec a
+	ld [hl], a
+
+	ld hl, sBox1 ; sBox7
+	ld bc, sBank2AllBoxesChecksum - sBox1
+	call SAVCheckSum
+	ld [sBank2AllBoxesChecksum], a ; sBank3AllBoxesChecksum
+	call CalcIndividualBoxCheckSums
+	xor a
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	ret
+
+DisplayChangeBoxMenu:
+	xor a
+	ld [H_AUTOBGTRANSFERENABLED], a
+	ld a, A_BUTTON | B_BUTTON
+	ld [wMenuWatchedKeys], a
+	ld a, 11
+	ld [wMaxMenuItem], a
+	ld a, 1
+	ld [wTopMenuItemY], a
+	ld a, 12
+	ld [wTopMenuItemX], a
+	xor a
+	ld [wMenuWatchMovingOutOfBounds], a
+	ld a, [wCurrentBoxNum]
+	and $7f
+	ld [wCurrentMenuItem], a
+	ld [wLastMenuItem], a
+	coord hl, 0, 0
+	ld b, 2
+	ld c, 9
+	call TextBoxBorder
+	ld hl, ChooseABoxText
+	call PrintText
+	coord hl, 11, 0
+	ld b, 12
+	ld c, 7
+	call TextBoxBorder
+	ld hl, hFlags_0xFFF6
+	set 2, [hl]
+	ld de, BoxNames
+	coord hl, 13, 1
+	call PlaceString
+	ld hl, hFlags_0xFFF6
+	res 2, [hl]
+	ld a, [wCurrentBoxNum]
+	and $7f
+	cp 9
+	jr c, .singleDigitBoxNum
+	sub 9
+	coord hl, 8, 2
+	ld [hl], "1"
+	add "0"
+	jr .next
+.singleDigitBoxNum
+	add "1"
+.next
+	Coorda 9, 2
+	coord hl, 1, 2
+	ld de, BoxNoText
+	call PlaceString
+	call GetMonCountsForAllBoxes
+	coord hl, 18, 1
+	ld de, wBoxMonCounts
+	ld bc, SCREEN_WIDTH
+	ld a, $c
+.loop
+	push af
+	ld a, [de]
+	and a ; is the box empty?
+	jr z, .skipPlacingPokeball
+	ld [hl], $78 ; place pokeball tile next to box name if box not empty
+.skipPlacingPokeball
+	add hl, bc
+	inc de
+	pop af
+	dec a
+	jr nz, .loop
+	ld a, 1
+	ld [H_AUTOBGTRANSFERENABLED], a
+	ret
+
+ChooseABoxText:
+	TX_FAR _ChooseABoxText
+	db "@"
+
+BoxNames:
+	db   "BOX 1"
+	next "BOX 2"
+	next "BOX 3"
+	next "BOX 4"
+	next "BOX 5"
+	next "BOX 6"
+	next "BOX 7"
+	next "BOX 8"
+	next "BOX 9"
+	next "BOX10"
+	next "BOX11"
+	next "BOX12@"
+
+BoxNoText:
+	db "BOX No.@"
+
+EmptyAllSRAMBoxes:
+; marks all boxes in SRAM as empty (initialisation for the first time the
+; player changes the box)
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	ld a, 2
+	ld [MBC1SRamBank], a
+	call EmptySRAMBoxesInBank
+	ld a, 3
+	ld [MBC1SRamBank], a
+	call EmptySRAMBoxesInBank
+	xor a
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	ret
+
+EmptySRAMBoxesInBank:
+; marks every box in the current SRAM bank as empty
+	ld hl, sBox1 ; sBox7
+	call EmptySRAMBox
+	ld hl, sBox2 ; sBox8
+	call EmptySRAMBox
+	ld hl, sBox3 ; sBox9
+	call EmptySRAMBox
+	ld hl, sBox4 ; sBox10
+	call EmptySRAMBox
+	ld hl, sBox5 ; sBox11
+	call EmptySRAMBox
+	ld hl, sBox6 ; sBox12
+	call EmptySRAMBox
+	ld hl, sBox1 ; sBox7
+	ld bc, sBank2AllBoxesChecksum - sBox1
+	call SAVCheckSum
+	ld [sBank2AllBoxesChecksum], a ; sBank3AllBoxesChecksum
+	call CalcIndividualBoxCheckSums
+	ret
+
+EmptySRAMBox:
+	xor a
+	ld [hli], a
+	dec a
+	ld [hl], a
+	ret
+
+GetMonCountsForAllBoxes:
+	ld hl, wBoxMonCounts
+	push hl
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	ld a, $2
+	ld [MBC1SRamBank], a
+	call GetMonCountsForBoxesInBank
+	ld a, $3
+	ld [MBC1SRamBank], a
+	call GetMonCountsForBoxesInBank
+	xor a
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	pop hl
+
+; copy the count for the current box from WRAM
+	ld a, [wCurrentBoxNum]
+	and $7f
+	ld c, a
+	ld b, 0
+	add hl, bc
+	ld a, [wNumInBox]
+	ld [hl], a
+
+	ret
+
+GetMonCountsForBoxesInBank:
+	ld a, [sBox1] ; sBox7
+	ld [hli], a
+	ld a, [sBox2] ; sBox8
+	ld [hli], a
+	ld a, [sBox3] ; sBox9
+	ld [hli], a
+	ld a, [sBox4] ; sBox10
+	ld [hli], a
+	ld a, [sBox5] ; sBox11
+	ld [hli], a
+	ld a, [sBox6] ; sBox12
+	ld [hli], a
+	ret
+
+SAVCheckRandomID:
+;checks if Sav file is the same by checking player's name 1st letter ($a598)
+; and the two random numbers generated at game beginning
+;(which are stored at wPlayerID)s
+	ld a, $0a
+	ld [MBC1SRamEnable], a
+	ld a, $01
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamBank], a
+	ld a, [sPlayerName]
+	and a
+	jr z, .next
+	ld hl, sPlayerName
+	ld bc, sMainDataCheckSum - sPlayerName
+	call SAVCheckSum
+	ld c, a
+	ld a, [sMainDataCheckSum]
+	cp c
+	jr nz, .next
+	ld hl, sMainData + (wPlayerID - wMainDataStart) ; player ID
+	ld a, [hli]
+	ld h, [hl]
+	ld l, a
+	ld a, [wPlayerID]
+	cp l
+	jr nz, .next
+	ld a, [wPlayerID + 1]
+	cp h
+.next
+	ld a, $00
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	ret
+
+SaveHallOfFameTeams:
+	ld a, [wNumHoFTeams]
+	dec a
+	cp HOF_TEAM_CAPACITY
+	jr nc, .shiftHOFTeams
+	ld hl, sHallOfFame
+	ld bc, HOF_TEAM
+	call AddNTimes
+	ld e, l
+	ld d, h
+	ld hl, wHallOfFame
+	ld bc, HOF_TEAM
+	jr HallOfFame_Copy
+
+.shiftHOFTeams
+; if the space designated for HOF teams is full, then shift all HOF teams to the next slot, making space for the new HOF team
+; this deletes the last HOF team though
+	ld hl, sHallOfFame + HOF_TEAM
+	ld de, sHallOfFame
+	ld bc, HOF_TEAM * (HOF_TEAM_CAPACITY - 1)
+	call HallOfFame_Copy
+	ld hl, wHallOfFame
+	ld de, sHallOfFame + HOF_TEAM * (HOF_TEAM_CAPACITY - 1)
+	ld bc, HOF_TEAM
+	jr HallOfFame_Copy
+
+LoadHallOfFameTeams:
+	ld hl, sHallOfFame
+	ld bc, HOF_TEAM
+	ld a, [wHoFTeamIndex]
+	call AddNTimes
+	ld de, wHallOfFame
+	ld bc, HOF_TEAM
+	; fallthrough
+
+HallOfFame_Copy:
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	xor a
+	ld [MBC1SRamBank], a
+	call CopyData
+	xor a
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	ret
+
+ClearSAV:
+	ld a, SRAM_ENABLE
+	ld [MBC1SRamEnable], a
+	ld a, $1
+	ld [MBC1SRamBankingMode], a
+	xor a
+	call PadSRAM_FF
+	ld a, $1
+	call PadSRAM_FF
+	ld a, $2
+	call PadSRAM_FF
+	ld a, $3
+	call PadSRAM_FF
+	xor a
+	ld [MBC1SRamBankingMode], a
+	ld [MBC1SRamEnable], a
+	ret
+
+PadSRAM_FF:
+	ld [MBC1SRamBank], a
+	ld hl, $a000
+	ld bc, $2000
+	ld a, $ff
+	jp FillMemory