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Main.asm
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; ======================================
; CryEd - cry editor for Pokémon Crystal
; ======================================
INCLUDE "includes.asm"
INCLUDE "wram.asm"
; =============
; Reset vectors
; =============
section "Reset $00",rom0[$00]
CallHL: jp hl
section "Reset $08",rom0[$08]
FillRAM:: jp _FillRAM
section "Reset $10",rom0[$10]
WaitVBlank:: jp _WaitVBlank
section "Reset $18",rom0[$18]
WaitTimer:: jp _WaitTimer
section "Reset $20",rom0[$20]
WaitLCDC:: jp _WaitLCDC
section "Reset $30",rom0[$30]
Panic:: jp _Panic
section "Reset $38",rom0[$38]
GenericTrap::
xor a
jp _Panic
; ==================
; Interrupt handlers
; ==================
section "VBlank IRQ",rom0[$40]
IRQ_VBlank:: jp DoVBlank
section "STAT IRQ",rom0[$48]
IRQ_Stat:: jp DoStat
section "Timer IRQ",rom0[$50]
IRQ_Timer:: jp DoTimer
section "Serial IRQ",rom0[$58]
IRQ_Serial:: reti ; not used
;section "Joypad IRQ",rom0[$60]
IRQ_Joypad:: reti ; not used
; ===============
; System routines
; ===============
include "SystemRoutines.asm"
; ==========
; ROM header
; ==========
section "ROM header",rom0[$100]
EntryPoint::
nop
jp ProgramStart
NintendoLogo: ; DO NOT MODIFY OR ROM WILL NOT BOOT!!!
db $ce,$ed,$66,$66,$cc,$0d,$00,$0b,$03,$73,$00,$83,$00,$0c,$00,$0d
db $00,$08,$11,$1f,$88,$89,$00,$0e,$dc,$cc,$6e,$e6,$dd,$dd,$d9,$99
db $bb,$bb,$67,$63,$6e,$0e,$ec,$cc,$dd,$dc,$99,$9f,$bb,$b9,$33,$3e
ROMTitle: romTitle "CRYED" ; ROM title (15 bytes)
GBCSupport: db $00 ; GBC support (0 = DMG only, $80 = DMG/GBC, $C0 = GBC only)
NewLicenseCode: db "DS" ; new license code (2 bytes)
SGBSupport: db 0 ; SGB support
CartType: db $1b ; Cart type, see hardware.inc for a list of values
ROMSize: ds 1 ; ROM size (handled by post-linking tool)
RAMSize: db 2 ; RAM size
DestCode: db 1 ; Destination code (0 = Japan, 1 = All others)
OldLicenseCode: db $33 ; Old license code (if $33, check new license code)
ROMVersion: db 0 ; ROM version
HeaderChecksum: ds 1 ; Header checksum (handled by post-linking tool)
ROMChecksum: ds 2 ; ROM checksum (2 bytes) (handled by post-linking tool)
; =====================
; Start of program code
; =====================
ProgramStart::
di
ld sp,$e000
push bc
push af
; disable LCD
.wait
ldh a,[rLY]
cp $90
jr nz,.wait
xor a
ldh [rLCDC],a
; init memory
ld hl,$c000 ; start of WRAM
ld bc,$1ffa ; don't clear stack
xor a
rst $08
ld hl,$8000 ; start of VRAM
ld bc,$2000
xor a
rst $08
; clear HRAM
ld bc,$7f80
xor a
.loop
ld [c],a
inc c
dec b
jr nz,.loop
call CopyDMARoutine
call $ff80 ; clear OAM
call LoadSaveScreen_SRAMCheck
jr nc,.noinitsram
ld a,$a
ld [rRAMG],a
xor a
ld hl,$a000
ld bc,$2000
rst $08
ld hl,.savestr
ld de,$a600
ld b,5
.strloop
ld a,[hl+]
ld [de],a
inc de
dec b
jr nz,.strloop
xor a
ld [$0000],a
jr .noinitsram
.savestr
db "SAVE!"
.noinitsram
; check GB type
; sets sys_GBType to 0 if DMG/SGB/GBP/GBL/SGB2, 1 if GBC, 2 if GBA/GBA SP/GB Player
; TODO: Improve checks to allow for GBP/SGB/SGB2 to be detected separately
pop af
pop bc
cp $11
jr nz,.dmg
.gbc
and 1 ; a = 1
add b ; b = 1 if on GBA
ld [sys_GBType],a
jr .continue
.dmg
xor a
ld [sys_GBType],a
.continue
InitCryEditor::
rst $10
xor a
ldh [rLCDC],a
ld a,9
ld [sys_MenuMax],a
xor a
ld [sys_MenuPos],a
call InitSound
; load font + graphics
CopyTileset1BPP Font,0,98
ld hl,CryEditorTilemap
call LoadMapText
; init rendering variables
SetDMGPal rBGP, 0,1,2,3
SetDMGPal rOBP0,0,0,2,3
SetDMGPal rOBP1,0,1,2,3
xor a
ldh [rSCX],a
ldh [rSCY],a
ldh [rWX],a
ldh [rWY],a
ld a,%10010001
ldh [rLCDC],a
ld a,IEF_VBLANK
ldh [rIE],a
ei
halt
CryEditorLoop::
ld a,[sys_btnPress]
bit A_BUTTON_F,a
jr nz,.playCry
bit START_F,a
jr nz,.playCry
bit B_BUTTON_F,a
jr nz,.resetCry
bit SELECT_F,a
jp nz,InitOptionsMenu
ld hl,sys_MenuPos
bit D_UP_F,a
jr nz,.editUp
bit D_DOWN_F,a
jr nz,.editDown
bit D_RIGHT_F,a
jr nz,.cursorNext
bit D_LEFT_F,a
jr nz,.cursorPrev
jr .continue
.resetCry
xor a
ld hl,CryEdit_CryBase
ld [hl+],a
ld [hl+],a
ld [hl+],a
ld [hl+],a
ld [hl+],a
jr .continue
.playCry
ld hl,CryEdit_CryBase
ld d,0
ld e,[hl]
inc hl
ld a,[hl+]
ld [wCryPitch],a
ld a,[hl+]
ld [wCryPitch+1],a
ld a,[hl+]
ld [wCryLength],a
ld a,[hl+]
ld [wCryLength+1],a
call CryEd_PreviewCry
jr .continue
.editUp
ld e,1
call CryEdit_EditNybble
jr .continue
.editDown
ld e,0
call CryEdit_EditNybble
jr .continue
.setItem
ld [hl],b
jr .continue
.cursorNext
ld b," "-32
call CryEditor_DrawCursor
inc [hl]
ld b,[hl]
ld a,[sys_MenuMax]
inc a
cp b
jr nz,.setItem
ld [hl],0
jr .continue
.cursorPrev
ld b," "-32
call CryEditor_DrawCursor
dec [hl]
ld a,[hl]
cp $ff
ld b,a
jr nz,.setItem
ld a,[sys_MenuMax]
ld [hl],a
; fall through to .continue
.continue
ld b,"^"-32
call CryEditor_DrawCursor
ld a,[CryEdit_CryBase]
ld hl,$9831
call DrawHex
ld a,[CryEdit_CryPitch+1]
ld hl,$986f
call DrawHex
ld a,[CryEdit_CryPitch]
call DrawHex
ld a,[CryEdit_CryLength+1]
ld hl,$98af
call DrawHex
ld a,[CryEdit_CryLength]
call DrawHex
halt
call UpdateSound
jp CryEditorLoop
; INPUT: b = char to use for cursor
; Destroys A.
CryEditor_DrawCursor::
push hl
ld a,[sys_MenuPos]
ld hl,CryEdit_CursorLocations
add a
add l
ld l,a
jr nc,.nocarry
inc h
.nocarry
ld a,[hl+]
ld h,[hl]
ld l,a
; write char
WaitForVRAM
ld [hl],b
pop hl
ret
CryEdit_EditNybble:
ld a,[sys_MenuPos]
ld b,a
add a
add b
ld hl,CryEdit_NybbleLocations
add l
ld l,a
jr nc,.nocarry
inc h
.nocarry
ld a,[hl+]
ld d,a
ld a,[hl+]
ld h,[hl]
ld l,a
ld a,d
and a
jr nz,.uppernybble
.lowernybble
ld a,e
and a
jr z,.sub1
jr .add1
.uppernybble
ld a,e
and a
jr z,.sub10
jr .add10
.add1
inc [hl]
ld a,[hl]
and $f
cp 0
ret nz
ld a,[hl]
sub $10
ld [hl],a
ret
.sub1
dec [hl]
ld a,[hl]
and $f
cp $f
ret nz
ld a,[hl]
add $10
ld [hl],a
ret
.add10
ld a,[hl]
add $10
ld [hl],a
ret
.sub10
ld a,[hl]
sub $10
ld [hl],a
ret
CryEdit_CursorLocations:
dw $9851,$9852 ; base
dw $988f,$9890,$9891,$9892 ; pitch
dw $98cf,$98d0,$98d1,$98d2 ; length
CryEdit_NybbleLocations:
dbw 1,CryEdit_CryBase
dbw 0,CryEdit_CryBase
dbw 1,CryEdit_CryPitch+1
dbw 0,CryEdit_CryPitch+1
dbw 1,CryEdit_CryPitch
dbw 0,CryEdit_CryPitch
dbw 1,CryEdit_CryLength+1
dbw 0,CryEdit_CryLength+1
dbw 1,CryEdit_CryLength
dbw 0,CryEdit_CryLength
Menu_DrawCursor::
push af
ld h,0
ld a,[sys_MenuPos]
ld l,a
add hl,hl ; x2
add hl,hl ; x4
add hl,hl ; x8
add hl,hl ; x16
add hl,hl ; x32
ld b,h
ld c,l
ld hl,$9861
add hl,bc
WaitForVRAM
pop af
ld [hl],a
ret
CryEditorTilemap::
; ####################
db " "
db " Base: $?? "
db " "
db " Pitch: $???? "
db " "
db " Length: $???? "
db " "
db " - CONTROLS - "
db "Left/Right Cursor"
db "Up/Down Edit value"
db "A/Start Test"
db "B Reset"
db "Select Menu"
db " "
db "Build date: "
.datestart
db __DATE__
.dateend
rept 20-(.dateend-.datestart)
db 20
endr
.timestart
db __TIME__
.timeend
rept 20-(.timeend-.timestart)
db 20
endr
db " "
; ####################
; ================================
InitOptionsMenu::
rst $10
xor a
ldh [rLCDC],a
ld a,2
ld [sys_MenuMax],a
xor a
ld [sys_MenuPos],a
call InitSound
; load font + graphics
CopyTileset1BPP Font,0,98
ld hl,OptionsMenuTilemap
call LoadMapText
xor a
call Options_PrintDescription
; init rendering variables
SetDMGPal rBGP, 0,1,2,3
SetDMGPal rOBP0,0,0,2,3
SetDMGPal rOBP1,0,1,2,3
xor a
ldh [rSCX],a
ldh [rSCY],a
ldh [rWX],a
ldh [rWY],a
ld a,%10010001
ldh [rLCDC],a
ld a,IEF_VBLANK
ldh [rIE],a
ei
ld de,6 ; SFX_MENU
call PlaySFX
halt
OptionsMenuLoop::
ld a,[sys_btnPress]
bit A_BUTTON_F,a
jr nz,.selectItem
bit B_BUTTON_F,a
jp nz,InitCryEditor
bit START_F,a
jr nz,.selectItem
bit SELECT_F,a
jr nz,.nextItem
bit D_UP_F,a
jr nz,.prevItem
bit D_DOWN_F,a
jr z,.continue
.nextItem
ld a," "-$20
call Menu_DrawCursor
ld a,[sys_MenuPos]
inc a
ld b,a
ld a,[sys_MenuMax]
inc a
cp b
ld a,b
jr nz,.setItem
xor a
.setItem
ld [sys_MenuPos],a
call Options_PrintDescription
jr .continue
.prevItem
ld a," "-$20
call Menu_DrawCursor
ld a,[sys_MenuPos]
dec a
cp $ff
jr nz,.setItem
ld a,[sys_MenuMax]
jr .setItem
.selectItem
ld hl,MenuItemPtrs_OptionsMenu
ld a,[sys_MenuPos]
add a
add l
ld l,a
jr nc,.nocarry
inc h
.nocarry
ld de,7 ; SFX_READ_TEXT
call PlaySFX
push af
; wait for SFX to finish playing
.waitSFX
call UpdateSound
halt
call IsSFXPlaying
jr nc,.waitSFX
call PtrToHL
rst $00
.continue
ld a,">"-$20
call Menu_DrawCursor
call UpdateSound
halt
jr OptionsMenuLoop
MenuItemPtrs_OptionsMenu::
dw .importCry
dw .loadSaveCry
dw .exit
.importCry
pop hl ; stack overflow prevention
jp InitCryImporter
.loadSaveCry
pop hl ; stack overflow prevention
xor a
jp InitLoadSaveScreen
.exit
pop hl ; stack overflow prevention
jp InitCryEditor
OptionsMenuTilemap::
; ####################
db " "
db " - OPTIONS - "
db " "
db " Import cry "
db " Load/save cry "
db " Exit "
db " "
db " "
db " "
db " "
db " "
db " "
db " "
db " "
db "DESCRIPTION LINE 1 "
db "DESCRIPTION LINE 2 "
db "DESCRIPTION LINE 3 "
db "DESCRIPTION LINE 4 "
OptionsMenu_DescriptionPointers:
dw .importCry
dw .loadSaveCry
dw .exit
.importCry
db "Import an existing "
db "cry. "
db " "
db " "
.loadSaveCry
db "Load or save a cry. "
db " "
db " "
db " "
.exit
db "Return to the cry "
db "editor. "
db " "
db " "
Options_PrintDescription:
ld bc,OptionsMenu_DescriptionPointers
ld h,0
ld l,a
add hl,hl
add hl,bc
ld a,[hl+]
ld h,[hl]
ld l,a
ld de,$99c0
ld bc,$414
.loop
ld a,[hl+]
sub 32
push af
WaitForVRAM
pop af
ld [de],a
inc de
dec c
jr nz,.loop
ld c,$14
ld a,e
add $c
jr nc,.continue
inc d
.continue
ld e,a
dec b
jr nz,.loop
ret
; ================
; Load/save screen
; ================
InitLoadSaveScreen:
rst $10
xor a
ldh [rLCDC],a
ld [sys_MenuPos],a
ld a,[SelectedSaveSlot]
ld [sys_MenuMax],a ; sys_MenuMax is repurposed as currently selected save slot
call InitSound
; load font + graphics
CopyTileset1BPP Font,0,98
CopyTileset1BPPInvert Font,$800,98
ld hl,LoadSaveScreenTilemap
call LoadMapText
xor a
ld hl,msg_dummy
call LoadSaveScreen_PrintLine
inc a
ld hl,msg_dummy
call LoadSaveScreen_PrintLine
; init rendering variables
SetDMGPal rBGP, 0,1,2,3
SetDMGPal rOBP0,0,0,2,3
SetDMGPal rOBP1,0,1,2,3
xor a
ldh [rSCX],a
ldh [rSCY],a
ldh [rWX],a
ldh [rWY],a
ld a,%10010001
ldh [rLCDC],a
ld a,IEF_VBLANK
ldh [rIE],a
ei
halt
LoadSaveScreenLoop:
call UpdateSound
ld hl,sys_MenuMax
ld a,[sys_btnPress]
bit A_BUTTON_F,a
jp nz,.selectSlot
bit B_BUTTON_F,a
jr nz,.exit
bit SELECT_F,a
jr nz,.previewCry
bit D_UP_F,a
jr nz,.add16
bit D_DOWN_F,a
jr nz,.sub16
bit D_RIGHT_F,a
jr nz,.add1
bit D_LEFT_F,a
jr nz,.sub1
.continue
ld a,[sys_MenuMax]
ld [SelectedSaveSlot],a
ld hl,$9871
call DrawHex
halt
jr LoadSaveScreenLoop
.previewCry
call LoadSaveScreen_SRAMCheck
jr c,.previewfail
ld a,[sys_MenuMax]
call LoadSaveScreen_GetPtr
ld a,$a
ld [rRAMG],a
push hl
call LoadSave_CheckIfCryExists
jp nc,.crydoesntexist
pop hl
ld a,[hl+]
ld d,0
ld e,a
inc hl
ld a,[hl+]
ld [wCryPitch],a
ld a,[hl+]
ld [wCryPitch+1],a
ld a,[hl+]
ld [wCryLength],a
ld a,[hl+]
ld [wCryLength+1],a
call CryEd_PreviewCry
jr .continue
.previewfail
call InitSound
ld de,$19 ; SFX_WRONG
call PlaySFX
ld hl,msg_previewfail
jp .doprintmessage
.sub1
dec [hl]
jr .continue
.add1
inc [hl]
jr .continue
.sub16
ld a,[hl]
sub 16
ld [hl],a
jr .continue
.add16
ld a,[hl]
add 16
ld [hl],a
jr .continue
.exit
call InitSound
ld de,$e
call PlaySFX
.waitSFX
call UpdateSound
halt
call IsSFXPlaying
jr nc,.waitSFX
jp InitCryEditor
.selectSlot
call InitSound
ld de,$7
call PlaySFX
.loop1
xor a
ld hl,msg_loadsave
call LoadSaveScreen_PrintLine
inc a
ld hl,prompt_loadsave
call LoadSaveScreen_PrintLine
call LoadSaveScreen_WaitForPrompt
cp $ff
jp z,.cancel
and a
jp nz,.doSave
dec a
jr nz,.doLoad
jp .continue
.doLoad
call LoadSaveScreen_SRAMCheck
jr c,.loadfail
call LoadSaveScreen_GetPtr
ld a,$a
ld [rRAMG],a
push hl
call LoadSave_CheckIfCryExists
jr nc,.crydoesntexist
pop hl
ld a,[hl+]
ld [CryEdit_CryBase],a
inc hl
ld a,[hl+]
ld [CryEdit_CryPitch],a
ld a,[hl+]
ld [CryEdit_CryPitch+1],a
ld a,[hl+]
ld [CryEdit_CryLength],a
ld a,[hl]
ld [CryEdit_CryLength+1],a
xor a
ld [rRAMG],a
call InitSound
ld de,$22
call PlaySFX
ld hl,msg_loaded
jr .doprintmessage
.crydoesntexist
xor a
ld [rRAMG],a
call InitSound
ld de,$19 ; SFX_WRONG
call PlaySFX
ld hl,msg_slotempty
jr .doprintmessage
.loadfail
call InitSound
ld de,$19 ; SFX_WRONG
call PlaySFX
ld hl,msg_loadfail
jr .doprintmessage
.savefail
xor a
ld [rRAMG],a
call InitSound
ld de,$19 ; SFX_WRONG
call PlaySFX
ld hl,msg_savefail
.doprintmessage
xor a
call LoadSaveScreen_PrintLine
inc a
ld hl,msg_dummy
call LoadSaveScreen_PrintLine
call LoadSaveScreen_WaitForButton
ld b,60
.loop
push bc
call UpdateSound
halt
pop bc
dec b
jr nz,.loop
; fall through to .cancel
.cancel
xor a
ld [rRAMG],a
ld hl,msg_dummy
call LoadSaveScreen_PrintLine
inc a
ld hl,msg_dummy
call LoadSaveScreen_PrintLine
jp .continue
.doSave
; save check
ld a,$a
ld [rRAMG],a
ld hl,$a606
ld a,$ed
ld [hl],a
ld b,a
ld a,[hl]
cp b
jr nz,.savefail
ld a,[sys_MenuMax]
call LoadSaveScreen_GetPtr
push hl
; check if cry exists
call LoadSave_CheckIfCryExists
jr nc,.crydoesntexist2
xor a
ld hl,msg_overwrite
call LoadSaveScreen_PrintLine
inc a
ld hl,prompt_yesno
call LoadSaveScreen_PrintLine
call InitSound
ld de,$7
call PlaySFX
call LoadSaveScreen_WaitForPrompt
cp $ff
jr z,.cancel
and a
jr nz,.crydoesntexist2
jr .cancel
.crydoesntexist2
pop de
ld hl,CryEdit_CryBase
ld a,[hl+]
ld [de],a
inc de
inc de
ld b,4
.saveloop
ld a,[hl+]
ld [de],a
inc de
dec b
jr nz,.saveloop
xor a
ld [rRAMG],a
call InitSound
ld de,$22
call PlaySFX
ld hl,msg_saved
jp .doprintmessage
; carry = 1 if cry exists
LoadSave_CheckIfCryExists:
ld b,3
.loop
ld c,0
ld a,[hl+]
add c
ld c,a
ld a,[hl+]
add c
ld c,a
cp 0
jr nz,.exists
dec b
jr nz,.loop
and a ; clear carry
ret
.exists
scf
ret
LoadSaveScreen_GetPtr:
ld a,[sys_MenuMax]
ld e,a
ld d,0
ld hl,$a000
add hl,de
add hl,de
add hl,de
add hl,de
add hl,de
add hl,de
ret
LoadSaveScreen_SRAMCheck:
ld a,$a
ld [rRAMG],a ; enable SRAM
ld hl,$a600
ld b,5
ld c,0
.loop
ld a,[hl+]
add c
ld c,a
dec b
jr nz,.loop
xor a
ld [rRAMG],a
ld a,c
cp $50
scf
ret nz ; return carry = 1 if check failed
ccf ; return carry = 0 if check passed
ret
LoadSaveScreen_WaitForButton:
call UpdateSound
halt
ld a,[sys_btnPress]
and a
jr nz,LoadSaveScreen_WaitForButton
ret
; OUTPUT: 0 if item 1 selected, 1 if item 2 selected, $ff if user cancelled
LoadSaveScreen_WaitForPrompt:
xor a
ld [sys_MenuPos],a
halt
.loop
ld a,[sys_btnPress]
bit D_LEFT_F,a
jr nz,.toggle
bit D_RIGHT_F,a
jr nz,.toggle
bit A_BUTTON_F,a
jr nz,.select
bit B_BUTTON_F,a
jr nz,.cancel
.continue
ld a,[sys_MenuPos]
and a
jr nz,.right