Files
alttpr-baserom/goalitem.asm
2023-07-10 10:25:50 -06:00

264 lines
6.4 KiB
NASM

;--------------------------------------------------------------------------------
; $7F5010 - Scratch Space (Callee Preserved)
;--------------------------------------------------------------------------------
!GOAL_DRAW_ADDRESS = "$7EC72A"
;--------------------------------------------------------------------------------
; DrawGoalIndicator moved to newhud.asm
;--------------------------------------------------------------------------------
GoalItemGanonCheck:
LDA $0E20, X : CMP.b #$D6 : BNE .success ; skip if not ganon
JSL.l CheckGanonVulnerability
BCS .success
.fail
LDA $0D80, X : CMP.b #17 : !BLT .success ; decmial 17 because Acmlm's chart is decimal
LDA.b #$00
RTL
.success
LDA $44 : CMP.b #$80 ; thing we wrote over
RTL
;--------------------------------------------------------------------------------
;Carry clear = ganon invincible
;Carry set = ganon vulnerable
CheckGanonVulnerability:
PHX
LDA.l InvincibleGanon
ASL
TAX
; Carry
; 0 - invulnerable
; 1 - vulnerable
JSR (.goals, X)
PLX
RTL
.goals
dw .vulnerable
dw .invulnerable
dw .all_dungeons
dw .crystals_and_aga
dw .crystals
dw .goal_item
dw .light_speed
dw .crystals_and_bosses
dw .bosses_only
dw .all_dungeons_no_agahnim
dw .completionist
; 00 = always vulnerable
.vulnerable
.success
SEC
RTS
; 01 = always invulnerable
.invulnerable
.fail
CLC
RTS
; 02 = All dungeons
.all_dungeons
LDA.l ProgressIndicator : CMP.b #$03 : BCC .fail ; require post-aga world state
; 09 = All dungeons except agahnim
.all_dungeons_no_agahnim
LDA.l PendantsField : AND.b #$07 : CMP.b #$07 : BNE .fail ; require all pendants
LDA.l CrystalsField : AND.b #$7F : CMP.b #$7F : BNE .fail ; require all crystals
LDA.l OverworldEventDataWRAM+$5B : AND.b #$20 : BEQ .fail ; require aga2 defeated (pyramid hole open)
BRA .success
; 03 = crystals and aga 2
.crystals_and_aga
LDA.l OverworldEventDataWRAM+$5B : AND.b #$20 : BEQ .fail ; check aga2 first then bleed in
; 04 = crystals only
.crystals
JSL CheckEnoughCrystalsForGanon
RTS
; 05 = require goal item
.goal_item
REP #$20
LDA.l GoalCounter : CMP.l GoalItemRequirement
SEP #$20
RTS
; 06 = light speed
.light_speed
BRA .fail
; 07 = Crystals and bosses
.crystals_and_bosses
JSL CheckEnoughCrystalsForGanon ; check crystals first then bleed in to next
BCC .fail
; 08 = Crystal bosses but no crystals
.bosses_only
JMP CheckForCrystalBossesDefeated
; 0a = Check Item counter
.completionist
REP #$20
LDA.l TotalItemCounter : CMP.l MaxItemCounter
SEP #$20
BCC .fail
BRA .all_dungeons
;--------------------------------------------------------------------------------
GTCutscene_CrystalMasks:
db %00000000 ; 0 crystals
db %10000000 ; BIT INDEX DIAGRAM
db %00010010 ; 0
db %00010101 ; 5 1
db %10010101 ; 7
db %10110110 ; 4 2
db %00111111 ; 3
db %10111111 ; 7 crystals
;--------------------------------------------------------------------------------
GTCutscene_ConditionalAnimateCrystals:
PHX : PHX
LDA.l NumberOfCrystalsRequiredForTower : TAX : LDA.l GTCutscene_CrystalMasks,X
PLX
- LSR : DEX : BPL -
PLX : BCC .skip_crystal
.draw_crystal
LDA.b $11 : BEQ + : JML.l GTCutscene_AnimateCrystals_NoRotate ; what we wrote over
+ JML.l GTCutscene_AnimateCrystals_NextCrystal+4
.skip_crystal
JML.l GTCutscene_DrawSingleCrystal-3
;--------------------------------------------------------------------------------
GTCutscene_ConditionalDrawSingleCrystal:
LDA.w $06FA : BEQ .draw_crystal : STZ.w $06FA
LDA.l NumberOfCrystalsRequiredForTower : TAX
LDA.l GTCutscene_CrystalMasks,X : AND.b #$80 : BEQ .skip_crystal
.draw_crystal
LDX.w $0FA0 : PHY ; what we wrote over
JML.l GTCutscene_DrawSingleCrystal+4
.skip_crystal
JML.l GTCutscene_DrawSingleCrystal_SkipCrystal
;--------------------------------------------------------------------------------
GTCutscene_AnimateCrystals_Prep:
BEQ + : JSL.l GTCutscene_SparkleALot : + ; thing we wrote over
LDA.l NumberOfCrystalsRequiredForTower : BNE +
JML.l GTCutscene_DrawSingleCrystal_SkipSparkle
+ CMP.b #$01 : BNE +
JML.l GTCutscene_DrawSingleCrystal
+ INC.w $06FA ; some free ram OWR also uses
JML.l GTCutscene_AnimateCrystals_NextCrystal-2
;--------------------------------------------------------------------------------
GTCutscene_ActivateSparkle_SelectCrystal:
LDA.l NumberOfCrystalsRequiredForTower : BNE +
TAX : RTL
+ TXA
- CMP.l NumberOfCrystalsRequiredForTower : BCC +
SBC.l NumberOfCrystalsRequiredForTower : BRA - ; carry guaranteed set
+ PHY : TAY
LDA.l NumberOfCrystalsRequiredForTower : TAX : LDA.l GTCutscene_CrystalMasks,X
LDX.b #$FF
- LSR : INX : BCC +
DEY
+ BPL -
PLY
RTL
;--------------------------------------------------------------------------------
CheckEnoughCrystalsForGanon:
LDA CrystalCounter
CMP.l NumberOfCrystalsRequiredForGanon
RTL
;--------------------------------------------------------------------------------
CheckEnoughCrystalsForTower:
LDA CrystalCounter
CMP.l NumberOfCrystalsRequiredForTower
RTL
;---------------------------------------------------------------------------------------------------
CheckAgaForPed:
LDA.l InvincibleGanon
CMP.b #$06 : BNE .vanilla
.light_speed
LDA.l OverworldEventDataWRAM+$80 ; check ped flag
AND.b #$40
BEQ .force_blue_ball
.vanilla ; run vanilla check for phase
LDA.w $0E30, X
CMP.b #$02
RTL
.force_blue_ball
LDA.b #$01 : STA.w $0DA0, Y
LDA.b #$20 : STA.w $0DF0, Y
CLC ; skip the RNG check
RTL
;---------------------------------------------------------------------------------------------------
KillGanon:
STA.l ProgressIndicator ; vanilla game state stuff we overwrote
LDA.l InvincibleGanon
CMP.b #$06 : BNE .exit
.light_speed
LDA.l OverworldEventDataWRAM+$5B : ORA.b #$20 : STA.l OverworldEventDataWRAM+$5B ; pyramid hole
LDA.b #$08 : STA.l RoomDataWRAM[$00].high ; kill ganon
LDA.b #$02 : STA.l MoonPearlEquipment ; pearl but invisible in menu
.exit
RTL
;---------------------------------------------------------------------------------------------------
CheckForCrystalBossesDefeated:
PHB : PHX : PHY
LDA.b #CrystalPendantFlags_2>>16
PHA : PLB
REP #$30
; count of number of bosses killed
STZ.b $00
LDY.w #10
.next_check
LDA.w CrystalPendantFlags_2-2,Y
BIT.w #$0040
BEQ ++
TYA
ASL
TAX
LDA.l DrawHUDDungeonItems_boss_room_ids-4,X
TAX
LDA.l RoomDataWRAM.l,X
AND.w #$0800
BEQ ++
INC.b $00
++ DEY
BPL .next_check
SEP #$30
PLY : PLX : PLB
LDA.b $00 : CMP.l NumberOfCrystalsRequiredForGanon
RTS