Add variable ganon vulnerability mode

2025-09-01 13:15:22 -05:00
parent cef41b1674
commit e4f9c4cffc
8 changed files with 385 additions and 28 deletions
--- a/LTTP_RND_GeneralBugfixes.asm
+++ b/LTTP_RND_GeneralBugfixes.asm
@@ -185,6 +185,8 @@ incsrc textrenderer.asm
 incsrc crystalswitchbook.asm
 incsrc mimicdash.asm
 incsrc gloom.asm
+incsrc special_weapons.asm
+incsrc variable_ganon_vulnerability.asm
 warnpc $A58000

 org $A28000
--- a/dialog.asm
+++ b/dialog.asm
@@ -284,28 +284,68 @@ RTL
 ; s = silver arrow bow
 ; p = 2nd progressive bow
 DialogGanon2:
-        JSL CheckGanonVulnerability
+	JSL CheckGanonVulnerability

-        REP #$20
-        BCS +
-        LDA.w #$018D : BRA ++
-        +
-        LDA.l BowTracking
+	REP #$20
+	BCS +
+		LDA.w #$018D : JMP .done
+	+
+	LDA.l GanonVulnerabilityItem : AND.w #$00FF
+	BEQ .silver_arrows
+	CMP.w #$0001 : BEQ .silver_arrows
+	CMP.w #$0004 : BEQ .bombs
+	CMP.w #$0005 : BEQ .powder
+	CMP.w #$0010 : BEQ .bee

-        BIT.w #$0080 : BNE + ; branch if bow
-        LDA.w #$0192 : BRA ++
-        +
-        BIT.w #$0040 : BEQ + ; branch if no silvers
-        LDA.w #$0195 : BRA ++
-        +
-        BIT.w #$0020 : BNE + ; branch if p bow
-        LDA.w #$0194 : BRA ++
-        +
-        LDA.w #$0193 : BRA ++
-        ++
-        STA.w TextID
-        SEP #$20
-        JSL Sprite_ShowMessageMinimal_Alt
+	PHX : TAX
+	LDA.l EquipmentWRAM-1, X
+	PLX
+	AND.w #$00FF : BNE .have
+	BRA .dont_have
+
+.silver_arrows
+	LDA.l BowTracking
+
+	BIT.w #$0080 : BEQ .dont_have ; no bow
+	BIT.w #$0040 : BNE .have ; have silvers
+
+	BIT.w #$0020 : BNE +
+		LDA.w #$0194 : BRA .done ; have p bow
+	LDA.w #$0193 : BRA .done ; don't have p bow
+
+.dont_have
+	LDA.w #$0192 : BRA .done
+.have
+	LDA.w #$0195 : BRA .done
+
+.bombs
+	LDA.l BombsEquipment : AND.w #$00FF : BNE .have
+	LDA.l InfiniteBombs : AND.w #$00FF : BNE .have
+	BRA .dont_have
+
+.powder
+	LDA.l InventoryTracking : BIT.w #$0010 : BNE .have
+	BRA .dont_have
+
+.bee
+	LDA.l BottleContentsOne : AND.w #$00FF
+	CMP.w #$0007 : BEQ .have
+	CMP.w #$0008 : BEQ .have
+	LDA.l BottleContentsTwo : AND.w #$00FF
+	CMP.w #$0007 : BEQ .have
+	CMP.w #$0008 : BEQ .have
+	LDA.l BottleContentsThree : AND.w #$00FF
+	CMP.w #$0007 : BEQ .have
+	CMP.w #$0008 : BEQ .have
+	LDA.l BottleContentsFour : AND.w #$00FF
+	CMP.w #$0007 : BEQ .have
+	CMP.w #$0008 : BEQ .have
+	BRA .dont_have
+
+.done
+	STA.w TextID
+	SEP #$20
+	JSL Sprite_ShowMessageMinimal_Alt
 RTL
 ;--------------------------------------------------------------------------------
 DialogEtherTablet:
--- a/hooks.asm
+++ b/hooks.asm
@@ -2730,16 +2730,48 @@ NOP #2 ; this fixes Link's direction after mirroring and falling after entering
 org $81B5E6
 LDA.b #$30

-;===================================================================================================
+;================================================================================
 ;--------------------------------------------------------------------------------
 ; Mimic dash changes
 ;--------------------------------------------------------------------------------
 org $9EC7BE
 JSL MimicDirection

-;===================================================================================================
+;================================================================================
 ;--------------------------------------------------------------------------------
 ; Gloom VRAM overwrite
 ;--------------------------------------------------------------------------------
 org $828068
 JSL AdjustDefaultGraphics
+
+;================================================================================
+; Special Weapons Modes
+;--------------------------------------------------------------------------------
+org $86ECC3 ; Bank06.asm@4704 (PHX : TAX : LDA.l .damage_classes, X : PLX)
+JSL DamageClassCalc
+BRA + : NOP #29 : +
+;--------------------------------------------------------------------------------
+org $86ED94 ; Bank06.asm@4866 (LDA $0E60, X : AND.b #$40)
+JSL Utility_CheckImpervious
+NOP
+;--------------------------------------------------------------------------------
+
+;================================================================================
+;--------------------------------------------------------------------------------
+; Variable Ganon Vulnerability
+;--------------------------------------------------------------------------------
+org $88BBD4 ; ancilla_magic_powder.asm@253 (LDA #$0A : JSL Ancilla_CheckSpriteDamage.preset_class)
+JSL Ganon_CheckPowderVulnerability
+NOP #2
+
+org $1D8F4E ; sprite_ganon.asm@325 (LDA $04C5 : CMP #$02)
+JSL Ganon_CheckInvincible
+NOP
+
+org $0DD628 ; Bank0D.asm@1266 (LDA $0B6B, Y : AND #$02)
+JSL CheckBeeBoss
+NOP
+
+org $0DD677 ; Bank0D.asm@1303 (JSL Ancilla_CheckSpriteDamage.preset_class)
+JSL Ganon_CheckBeeVulnerability
+;--------------------------------------------------------------------------------
--- a/special_weapons.asm
+++ b/special_weapons.asm
@@ -0,0 +1,126 @@
+DamageClassCalc:
+	PHA
+	LDA.l GanonVulnerabilityItem : BEQ +
+	LDA.w SpriteTypeTable, X : CMP.b #$D7 : BNE +
+	PLA
+	JSL Ganon_CheckAncillaVulnerability
+	RTL
+
+	LDA.l SpecialWeapons : AND.b #$7F : CMP.b #$06 : BEQ .cane_immune
+	PLA
+	CMP.b #$01 : BEQ .red_cane
+	CMP.b #$2C : BEQ .red_cane
+	CMP.b #$31 : BEQ .blue_cane
+	CMP.b #$0C : BEQ .beam
+	BRA .not_cane_or_beam
+
+.red_cane
+	PHA
+	LDA.l SpecialWeapons : AND.b #$7F : CMP.b #$04 : BEQ .special_cane
+	                                    CMP.b #$05 : BEQ .special_cane
+	LDA.l SpecialWeapons : BIT.b #$80 : BNE .cane_immune
+	BRA .normal
+
+.blue_cane
+	PHA
+	LDA.l SpecialWeapons : AND.b #$7F : CMP.b #$03 : BEQ .special_cane
+	                                    CMP.b #$05 : BEQ .special_cane
+	LDA.l SpecialWeapons : BIT.b #$80 : BNE .cane_immune
+	BRA .normal
+
+.cane_immune
+	LDA.w SpriteTypeTable, X : CMP.b #$1E : BEQ .normal ; crystal switch
+	PLA
+	BRA .impervious
+
+.special_cane
+	PLA
+	LDA.w SpriteTypeTable, X : CMP.b #$D6 : BEQ .unstunned_ganon
+	                           CMP.b #$88 : BEQ .mothula
+	BRA .special_level
+
+.impervious
+	LDA.b #$FF
+	RTL
+
+.beam
+	PHA
+	LDA.l SpecialWeapons : AND.b #$7F : CMP.b #$02 : BNE .normal
+	PLA
+	LDA.b #$05
+	RTL
+
+.normal
+	PLA
+
+.not_cane_or_beam
+	CMP.b #$07 : BNE .no_change
+	LDA.l SpecialWeapons : AND.b #$7F : CMP.b #$01 : BNE .normal_bombs
+	LDA.l SpecialWeaponLevel : BEQ .normal_bombs
+	LDA.w SpriteTypeTable, X : CMP.b #$D6 : BEQ .unstunned_ganon
+	                           CMP.b #$88 : BEQ .mothula
+	                           CMP.b #$91 : BEQ .stalfos_knight
+	                           CMP.b #$92 : BEQ .helmasaur_king
+
+.special_level
+	LDA.l SpecialWeaponLevel
+	BRA .done
+
+.mothula
+	LDA.l SpecialWeaponLevel
+	CMP.b #$04 : BCS .fix_mothula
+	BRA .done
+
+.fix_mothula
+	LDA.b #$03
+	BRA .done
+
+.stalfos_knight
+	LDA.l StalfosBombDamage : BEQ .special_level
+	LDA.b #$08
+	BRA .done
+
+.helmasaur_king
+	LDA.w $0DB0, X : CMP.b #$03 : BCS .special_level
+	LDA.b #$08
+	BRA .done
+
+.unstunned_ganon
+	LDA.w $04C5 : CMP.b #$02 : BNE .impervious
+	LDA.w $0EE0, X : BNE .impervious
+	LDA.b #$34 : STA.w $0EE0, X ; give the poor pig some i-frames
+	BRA .special_level
+
+.normal_bombs
+	LDA.b #$07
+
+.no_change
+	PHX : TAX
+	LDA.l $86EC84, X
+	PLX
+	CMP.b #$06 : BNE .done
+	LDA.l BowEquipment : CMP.b #$03 : BCS .actual_silver_arrows
+
+.normal_arrows
+	LDA.b #$06
+
+.done
+	RTL
+
+.actual_silver_arrows
+	LDA.w SpriteTypeTable, X : CMP.b #$D7 : BNE +
+	LDA.b #$20 : STA.w SpriteTimerE, X
+	LDA.b #$09
+	RTL
+;--------------------------------------------------------------------------------
+Utility_CheckImpervious:
+	LDA.w SpriteControl, X : AND.b #$40 : BNE .impervious
+	LDA.w $0CF2 : CMP.b #$FF : BEQ .impervious
+	LDA.w UseY1 : AND.b #$0A : BEQ .not_impervious ; normal behavior if not hammering
+	JSL Ganon_CheckHammerVulnerability : BCS .not_impervious
+
+.not_impervious
+	LDA.b #$00 : RTL
+.impervious
+	LDA.b #$01 : RTL
+;--------------------------------------------------------------------------------
--- a/sram.asm
+++ b/sram.asm
@@ -190,7 +190,9 @@ ItemLimitCounts: skip 16        ; Keeps track of limited non-progressive items s
                                ; See: ItemSubstitutionRules in tables.asm
                                ; Right now this is only used for three items but extra space is
                                ; reserved
-skip 37                         ; Unused
+skip 35                         ; Unused
+SpecialWeaponLevel: skip 1      ; keeps track of level in special weapon modes
+ItemOnB: skip 1                 ; NYI
 ProgressIndicator: skip 1       ; $00 = Pre-Uncle | $01 = Post-Uncle item | $02 = Zelda Rescued
                                ; $03 = Agahnim 1 defeated
                                ; $04 and above don't do anything. $00-$02 used in standard mode
--- a/swordswap.asm
+++ b/swordswap.asm
@@ -98,11 +98,20 @@ RTL
 ;================================================================================
 CheckGanonHammerDamage:
 	LDA.l HammerableGanon : BEQ +
-	LDA.w SpriteTypeTable, X : CMP.b #$D8 ; original behavior except ganon
-RTL
+		LDA.w SpriteTypeTable, X : CMP.b #$D8 ; original behavior except ganon
+		RTL
 	+
+	LDA.l GanonVulnerabilityItem : CMP.b #$0C : BEQ .hammer_silvers
 	LDA.w SpriteTypeTable, X : CMP.b #$D6 ; original behavior
-RTL
+	RTL
+
+.hammer_silvers
+	LDA.w SpriteTypeTable, X : CMP.b #$D8 : BCC +
+	RTL
+	CMP.b #$D6 : BNE +
+	RTL
+	CLC
+	RTL
 ;================================================================================
 GetSmithSword:
 	JSL ItemCheck_SmithSword : BEQ + : JML Smithy_AlreadyGotSword : +
--- a/tables.asm
+++ b/tables.asm
@@ -103,9 +103,25 @@ ChallengeModes:
 ; d - damage modes (0 - normal, 1 - ohko, 2 - gloom)
 db $00
 ;--------------------------------------------------------------------------------
-; 0x18002E (Reserved for Ganon Vulnerability Item)
+org $B0802E
+GanonVulnerabilityItem:
+db $00 ; $00 = default behavior (silver arrows)
 ;--------------------------------------------------------------------------------
-; 0x18002F (Reserved for Special Weapons)
+org $B0902F
+SpecialWeapons:
+db #$00
+; s - - -  m m m m (bitfield) - NYI
+; s - only swords damage can hurt enemies
+; m - special weapon mode
+; $00 = Off (default)
+; $01 = Bomb mode
+; $02 = Pseudosword
+; $03 = Byrna mode
+; $04 = Somaria mode
+; $05 = Canes mode
+; $06 = Bee mode
+; $07 = Unused
+; $08 = Bugnet mode
 ;--------------------------------------------------------------------------------
 ; 0x180030 (Unused)
 ;--------------------------------------------------------------------------------
--- a/variable_ganon_vulnerability.asm
+++ b/variable_ganon_vulnerability.asm
@@ -0,0 +1,130 @@
+Ganon_CheckAncillaVulnerability:
+	PHA
+	LDA.w $0EE0, X : BNE .not_vulnerable_pla
+	PLA
+	PHX : PHA
+	LDA.l GanonVulnerabilityItem
+	BMI .no_weakness
+	TAX : PLA
+	CMP.l Ganon_CheckByAncilla, X : BNE +
+	PLX : BRA .vulnerable
+	PLX : PHA
+	LDA.l GanonVulnerabilityItem
+	BEQ .silver_arrows
+	CMP.b #$01 : BEQ .silver_arrows
+	CMP.b #$11 : BEQ .somaria
+	BRA .not_vulnerable_pla
+
+.no_weakness
+	PLA : PLX
+	BRA .not_vulnerable
+
+.silver_arrows
+	PLA : CMP.b #$09 : BNE .not_vulnerable
+	LDA.l BowEquipment : CMP.b #$03 : BCS +
+		LDA.b #$09 : BRA .not_vulnerable
+	BRA .vulnerable
+
+.somaria
+	PLA
+	CMP.b #$01 : BEQ .vulnerable
+	CMP.b #$2C : BEQ .vulnerable
+	BRA .not_vulnerable
+
+.vulnerable
+	PHX
+	LDA.l GanonVulnerabilityItem
+	TAX
+	LDA.l Ganon_IFrameDuration, X
+	PLX
+	STA.w $0EE0, X ; give the poor pig some iframes
+	LDA.b #$20 : STA.w SpriteTimerE, X
+	LDA.b #$09
+	RTL
+.not_vulnerable_pla_pla
+	PLA
+.not_vulnerable_pla
+	PLA
+.not_vulnerable
+	PHX : TAX
+	LDA.l $86EC84, X
+	PLX
+	RTL
+;--------------------------------------------------------------------------------
+Ganon_CheckPowderVulnerability:
+	LDA.l GanonVulnerabilityItem : CMP.b #$05 : BNE .normal
+	LDA.w SpriteTypeTable, X : CMP.b #$D7 : BNE .normal
+	LDA.w $0EE0, X : BNE .normal ; ganon has i-frames
+	LDA.l Ganon_IFrameDuration+$05
+	STA.w $0EE0, X ; give ganon i-frames
+	LDA.b #$20 : STA.w SpriteTimerE, X
+	LDA.b #$09
+	BRA .done
+
+.normal
+	LDA.b #$0A
+.done
+	JML $86ECE6
+;--------------------------------------------------------------------------------
+Ganon_CheckBeeVulnerability:
+; X is bee sprite index
+; Y is target sprite index
+	LDA.l GanonVulnerabilityItem : CMP.b #$10 : BNE .normal
+	LDA.w SpriteTypeTable, Y : CMP.b #$D7 : BNE .normal
+	LDA.w $0EE0, Y : BNE .normal ; ganon has i-frames
+	LDA.l Ganon_IFrameDuration+$10
+	STA.w $0EE0, X ; give ganon i-frames
+	LDA.b #$20 : STA.w SpriteTimerE, X
+	LDA.b #$09
+	BRA .done
+
+.normal
+	LDA.b #$01
+.done
+	TYX
+	JML $86ECE6
+;--------------------------------------------------------------------------------
+Ganon_CheckInvincible:
+	LDA.w $04C5 : CMP.b #$02 : BEQ .not_transparent
+	LDA.w SpriteTypeTable, X : CMP.b #$D7 : BNE .transparent ; non-stunned ganon
+	LDA.w UseY1 : AND.b #$0A : BEQ .transparent ; normal behavior if not hammering
+	LDA.l GanonVulnerabilityItem : CMP.b #$0C : BNE .transparent
+.not_transparent
+	LDA.b #$00 : RTL
+.transparent
+	LDA.b #$01 : RTL
+;--------------------------------------------------------------------------------
+Ganon_CheckHammerVulnerability:
+	LDA.l GanonVulnerabilityItem : CMP.b #$0C : BNE .normal
+	LDA.w SpriteTypeTable, X : CMP.b #$D7 : BNE .normal
+	LDA.w $0EE0, X : BNE .normal ; ganon has i-frames
+	LDA.l Ganon_IFrameDuration+$0C
+	STA.w $0EE0, X ; give ganon i-frames
+	LDA.b #$20 : STA.w SpriteTimerE, X
+	LDA.b #$09 : STA.w $0CF2 ; set damage class to silver
+	SEC : RTL
+.normal
+	CLC : RTL
+;--------------------------------------------------------------------------------
+CheckBeeBoss:
+; Y is sprite index
+	LDA.l GanonVulnerabilityItem : CMP.b #$10 : BNE .normal
+	LDA.w SpriteTypeTable, Y : CMP.b #$D7 : BNE .normal
+	LDA.b #$00 : RTL
+.normal
+	LDA.w $0B6B, Y : AND.b #$02
+	RTL
+;--------------------------------------------------------------------------------
+Ganon_CheckByAncilla:
+	db #$00 ; default behavior
+	db #$00, #$05, #$1F, #$07, #$00
+	db #$02, #$0B, #$19, #$18, #$1C
+	db #$00, #$00, #$00, #$00, #$00
+	db #$00, #$00, #$31, #$00, #$00
+Ganon_IFrameDuration:
+	db #$00 ; default behavior
+	db #$00, #$00, #$00, #$34, #$00
+	db #$00, #$00, #$00, #$00, #$00
+	db #$00, #$00, #$00, #$00, #$00
+	db #$00, #$00, #$00, #$00, #$00
+;--------------------------------------------------------------------------------