Shield handling for pots and enemy drops and a few more NPCs

2026-02-07 16:51:21 -06:00
parent 381868c3ce
commit 779c9a27ce
12 changed files with 112 additions and 40 deletions
--- a/bookofmudora.asm
+++ b/bookofmudora.asm
@@ -53,6 +53,12 @@ RTL
 GiveBonkItem:
    LDA.w SprItemMWPlayer, X : STA.l !MULTIWORLD_ITEM_PLAYER_ID
    LDA.w SprSourceItemId, X
+
+    PHY : TAY
+    JSL ShieldCheck
+    TYA : PLY
+    BCC .done
+
    JSR AbsorbKeyCheck : BCC .notKey
        PHY : LDY.b #$24 : JSL AddInventory : PLY ; do inventory processing for a small key
        LDA.l CurrentSmallKeys : INC A : STA.l CurrentSmallKeys
@@ -61,6 +67,7 @@ GiveBonkItem:
        RTL
    .notKey
    PHY : TAY : JSL Link_ReceiveItem : PLY
+    .done
 RTL
 ;--------------------------------------------------------------------------------
 LoadBonkItem:
--- a/decryption.asm
+++ b/decryption.asm
@@ -72,18 +72,27 @@ JML Dungeon_OpenKeyedObject_nextChest

 		TXA : LSR
 		JSL RetrieveValueFromEncryptedTable
-		JSL ShieldCheck
 		STA.b Scrap0C

 	PLA : STA.b Scrap02 : PLA : STA.b Scrap00

 	LDA.l ChestData, X : ASL A : BCC .smallChest

-	JSL ShieldCheck : BCC .couldntFindChest
+	PHY
+	LDY.b Scrap0C
+	JSL ShieldCheck
+	STY.b Scrap0C
+	PLY
+	BCC .couldntFindChest
 	JML Dungeon_OpenKeyedObject_bigChest ;(bank01.asm line #13783)

 .smallChest
-	JSL ShieldCheck : BCC .couldntFindChest
+	PHY
+	LDY.b Scrap0C
+	JSL ShieldCheck
+	STY.b Scrap0C
+	PLY
+	BCC .couldntFindChest
 	JML Dungeon_OpenKeyedObject_smallChest

 .couldntFindChest
--- a/halfmagicbat.asm
+++ b/halfmagicbat.asm
@@ -2,13 +2,20 @@
 ; Randomize Half Magic Bat
 ;--------------------------------------------------------------------------------
 GetMagicBatItem:
-	JSL ItemSet_MagicBat
 	%GetPossiblyEncryptedItem(MagicBatItem, SpriteItemValues)
 	CMP.b #$FF : BEQ .normalLogic
 	TAY
-	PHA : LDA.l MagicBatItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID : PLA
+	PHA
+	JSL ShieldCheck
+	BCC .have_shield
+	LDA.l MagicBatItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
+	JSL ItemSet_MagicBat
+	PLA
 	STZ.b ItemReceiptMethod ; 0 = Receiving item from an NPC or message
 	JML Link_ReceiveItem
+.have_shield
+	PLA
+	RTL
 .normalLogic
 	LDA.l HalfMagic
 	STA.l MagicConsumption
--- a/heartpieces.asm
+++ b/heartpieces.asm
@@ -11,10 +11,8 @@ HeartPieceGet:
    RTL
 ;--------------------------------------------------------------------------------
 HeartGet:
-    STY.b $0C
    JSL ShieldCheck
-    BCC .done
-    LDY.b $0C
+    BCC .skip

    LDA.w SprItemMWPlayer, X : STA.l !MULTIWORLD_ITEM_PLAYER_ID
    CPY.b #$26 : BNE .not_heart ; don't add a 1/4 heart if it's not a heart piece
@@ -26,7 +24,10 @@ HeartGet:
    JSL Link_ReceiveItem
    JSL MaybeUnlockTabletAnimation
    SEC
-.done
+    RTL
+.skip
+    JSL MaybeFreeLinkFromTablet
+    CLC
    RTL
 ;--------------------------------------------------------------------------------
 HeartContainerGet:
--- a/hooks.asm
+++ b/hooks.asm
@@ -2010,7 +2010,7 @@ org $85EE53 ; <- 2EE53 - mushroom.asm : 22
 JSL ItemCheck_Mushroom : NOP #2
 ;--------------------------------------------------------------------------------
 org $85EE8C ; <- 2EE8C - mushroom.asm : 69
-JSL ItemSet_Mushroom : NOP
+JSL ItemSet_Mushroom : NOP #5
 ;--------------------------------------------------------------------------------
 org $85F53E ; <- 2F53E - sprite_potion_shop.asm : 40
 JSL ItemCheck_Powder : CMP.b #$20
@@ -2067,9 +2067,7 @@ JSL HeartPieceSpawnDelayFix
 ;--------------------------------------------------------------------------------
 org $85F08A ; <- 2F08A - sprite_heart_upgrades.asm : 324 - (LDA $7EF36B : INC A : AND.b #$03 : STA $7EF36B : BNE .got_4_piecese) item determination
 JSL HeartPieceGet
-PHP
 JSL DynamicDrawCleanup
-PLP : BCC +
 JSL IsMedallion
 BCS + : BRA Sprite_EB_HeartPiece_handle_flags : + ; Don't change OW flags if we're
 STZ.w SpriteAITable, X : RTS                      ; getting a tablet item
--- a/inventory.asm
+++ b/inventory.asm
@@ -650,14 +650,21 @@ CollectPowder:
  BNE +
  ; if for any reason the item value is 0 reload it, just in case
    %GetPossiblyEncryptedItem(WitchItem, SpriteItemValues) : TAY
-  + PHA
+  +
+  PHA
+  JSL ShieldCheck
+  BCC .skip
+
+
  LDA.l WitchItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
  LDA.b #$01 : STA.l ShopEnableCount
  PLA
  STZ.w ItemReceiptMethod ; item from NPC
  JSL Link_ReceiveItem
-  PHA : LDA.b #$00 : STA.l ShopEnableCount : STA.l PowderFlag : PLA
+  PHA : LDA.b #$00 : STA.l ShopEnableCount : STA.l PowderFlag
  JSL ItemSet_Powder
+.skip
+  PLA
 RTL
 ;--------------------------------------------------------------------------------

--- a/keydrop/standing_items.asm
+++ b/keydrop/standing_items.asm
@@ -696,6 +696,14 @@ KeyGet:
        LDA.l StandingItemsOn : BNE +
            PLA : RTL
        + LDY.w SprSourceItemId, X
+
+        JSL ShieldCheck
+        BCS .not_replaced
+            PLA : PLA : PLA ; remove stored address to jump back to
+            PLA ; restore the A value going into KeyGet
+            JML $86D1A8
+        .not_replaced
+
        LDA.w SprItemIndex, X : STA.w SpawnedItemIndex
        LDA.w SprItemFlags, X : STA.w SpawnedItemFlag
        STY.b Scrap00
--- a/multiworld.asm
+++ b/multiworld.asm
@@ -202,13 +202,22 @@ RTL

 Multiworld_BottleVendor_GiveBottle:
 {
+	PHA
+	JSL ShieldCheck
+	PLA
+	BCC .no_take_shield
+
 	PHA : PHP
 	SEP #$20
 	LDA.l BottleMerchant_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
 	PLP : PLA

 	JSL Link_ReceiveItem ; thing we wrote over
-RTL
+	RTL
+
+.no_take_shield
+	PLA : PLA : PLA : PLX
+	JML $85EB3A
 }

 Multiworld_MiddleAgedMan_ReactToSecretKeepingResponse:
--- a/npcitems.asm
+++ b/npcitems.asm
@@ -99,10 +99,8 @@ RTL

 ItemSet_OldMan:
 	PHA
-	TYA : STA.b $0C
 	JSL ShieldCheck
 	BCC .skip
-	LDA.b $0C : TAY

 	LDA.l OldManItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
 	PLA
@@ -119,10 +117,8 @@ RTL

 ItemSet_SickKid:
 	PHA
-	TYA : STA.b $0C
 	JSL ShieldCheck
 	BCC .skip
-	LDA.b $0C : TAY

 	LDA.l SickKidItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
 	PLA
@@ -135,10 +131,8 @@ RTL

 ItemSet_TreeKid:
 	PHA
-	TYA : STA.b $0C
 	JSL ShieldCheck
 	BCC .skip
-	LDA.b $0C : TAY

 	LDA.l TreeKidItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
 	PLA
@@ -151,10 +145,8 @@ RTL

 ItemSet_Sahasrala:
 	PHA
-	TYA : STA.b $0C
 	JSL ShieldCheck
 	BCC .skip
-	LDA.b $0C : TAY

 	LDA.l SahasralaItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
 	PLA
@@ -171,10 +163,8 @@ RTL

 ItemSet_Library:
 	PHA
-	TYA : STA.b $0C
 	JSL ShieldCheck
 	BCC .skip
-	LDA.b $0C : TAY

 	LDA.l LibraryItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
 	PLA
@@ -187,15 +177,23 @@ RTL

 ItemSet_Mushroom:
 	PHA
-		LDA.l NpcFlags+1 : ORA.b #$10 : STA.l NpcFlags+1
 		LDY.w SprSourceItemId, X ; Retrieve stored item type
 		BNE +
 			; if for any reason the item value is 0 reload it, just in case
 			%GetPossiblyEncryptedItem(MushroomItem, SpriteItemValues) : TAY
 		+
+
+		JSL ShieldCheck
+		BCC .skip
 	LDA.l MushroomItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
-	PLA
 	STZ.w ItemReceiptMethod ; thing we wrote over - the mushroom is an npc for item purposes apparently
+	PLA
+
+	JSL Link_ReceiveItem
+	PHA
+	LDA.l NpcFlags+1 : ORA.b #$10 : STA.l NpcFlags+1
+.skip
+	PLA
 RTL

 ItemSet_Powder:
@@ -273,20 +271,16 @@ MarkThrownItem:
 	LDA.b OverworldIndex : CMP.b #$81 : BNE .catfish

 	.zora
-	TYA : STA.b $0C
 	JSL ShieldCheck
 	BCC .skip
-	LDA.b $0C : TAY

 	JSL ItemSet_ZoraKing
 	LDA.l ZoraItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
 	BRA .done

 	.catfish
-	TYA : STA.b $0C
 	JSL ShieldCheck
 	BCC .skip
-	LDA.b $0C : TAY
 	JSL ItemSet_Catfish

 	LDA.l CatfishItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
--- a/pikit.asm
+++ b/pikit.asm
@@ -74,7 +74,11 @@ LinkAwaken:
 	RTL

 BigChest_ShieldCheck:
+	PHY
+	LDY.b $0C
 	JSL ShieldCheck
+	STY.b $0C
+	PLY
 	BCC .no_open
 	LDA.l BigKeyField
 	AND.l BitMasks, X
@@ -82,7 +86,11 @@ BigChest_ShieldCheck:
 	RTL

 SmallChest_ShieldCheck:
+	PHY
+	LDY.b $0C
 	JSL ShieldCheck
+	STY.b $0C
+	PLY
 	BCC .no_open
 	LDA.w DungeonID
 	ORA.w RoomFlagMask, Y
@@ -93,7 +101,7 @@ ShieldCheck:
 	PHP
 	REP #$30
 	PHX
-	LDA.b $0C
+	TYA
 	AND.w #$00FF
 	TAX
 	LDA.l PikitItemList, X
@@ -110,8 +118,7 @@ ShieldCheck:
 	BNE .already_have_shield
 	TXA
 	STA.l PikitItem
-	LDA.w #$0004
-	STA.b $0C
+	LDY.w #$0004
 	PLX
 	PLP
 	SEC
--- a/swordswap.asm
+++ b/swordswap.asm
@@ -132,6 +132,10 @@ GetSmithSword:
 	.buy
 		LDA.l SmithItem_Player : STA.l !MULTIWORLD_ITEM_PLAYER_ID
 		LDA.l SmithItem : TAY
+
+		JSL ShieldCheck
+		BCC .done
+
 		STZ.w ItemReceiptMethod ; Item from NPC
 		PHX : JSL Link_ReceiveItem : PLX

--- a/tablets.asm
+++ b/tablets.asm
@@ -62,6 +62,27 @@ MaybeUnlockTabletAnimation:
 			STZ.w ForceSwordUp ; release link from item-up pose
 			LDA.b #$00 : STA.b LinkState ; set link to ground state

+			REP #$20 ; set 16-bit accumulator
+				LDA.b OverworldIndex : CMP.w #$0030 : BNE ++ ; Desert
+					SEP #$20 ; set 8-bit accumulator
+					LDA.b #$02 : STA.b LinkDirection ; face link forward
+					LDA.b #$3C : STA.b LinkIncapacitatedTimer ; lock link for 60f
+					STZ.w CutsceneFlag
+				++
+			SEP #$20 ; set 8-bit accumulator
+		+
+	PLP : PLA
+RTL
+;--------------------------------------------------------------------------------
+MaybeFreeLinkFromTablet:
+	PHA : PHP
+		JSL IsMedallion : BCC +
+			STZ.w MedallionFlag ; disable falling-medallion mode
+			STZ.w ForceSwordUp ; release link from item-up pose
+			LDA.b #$00 : STA.b LinkState ; set link to ground state
+			STZ.w CutsceneFlag
+			STZ.w NoDamage
+
 			REP #$20 ; set 16-bit accumulator
 				LDA.b OverworldIndex : CMP.w #$0030 : BNE ++ ; Desert
 					SEP #$20 ; set 8-bit accumulator