Implement checking for what maps can be viewed

gk/doors_dungeon_map.asm

@@ -1240,7 +1240,7 @@ DrawDoorsMapBlinker:
 	AND.w #$01E0
 	ASL A : ASL A : ASL A
 	XBA
-	CLC : ADC.w #$00A4
+	CLC : ADC.w #$00A5
 	STA.w OAMBuffer, X
 
 	LDA.b LinkPosY
@@ -1718,10 +1718,13 @@ DoorsMapChangeDungeon:
 	BNE +
 	INX
 +	LDA.l DungeonMapData.prev, X
+	STA.w DungeonID
 	CMP.b $00
 	BEQ .done
 
-	STA.w DungeonID
+	JSL IsValidDungeonToSwapTo
+	BCC .next
+
 	JSL FindFirstEntrance
 	CPY.b #$FF
 	BEQ .next

gk/draw_loot.asm

@@ -1,4 +1,5 @@
 RedrawLoot:
+	SEP #$20
 	JSL DrawLoot
 
 	; what we wrote over

gk/dungeon_indicator.asm

@@ -5,6 +5,15 @@ LoadDungeonIndicator:
 	LDA.w DungeonID
 	CMP.b #DungeonIndicatorMap_end-DungeonIndicatorMap : BCS .done
 	TAX
+
+	; mark dungeon as entered
+	REP #$20
+	LDA.w DungeonMask, X
+	ORA.l DungeonVisited
+	STA.l DungeonVisited
+	SEP #$20
+
+	; load indicator
 	LDA.l DungeonIndicatorMap, X
 	TAX
 

gk/dungeon_switch.asm

@@ -42,6 +42,8 @@ CheckSwitchMap:
 	BRA .doors_done
 
 .change_dungeon
+	LDA.l MapSwapping
+	BEQ .doors_done
 	JSL DoorsMapChangeDungeon
 	BRA .doors_done
 
@@ -59,10 +61,14 @@ CheckSwitchMap:
 
 .not_fancy_door_map
 	SEP #$20
+	LDA.l MapSwapping
+	BEQ .no_swap
+
 	LDA.b $F6
 	AND.b #$30
-	BNE +
+	BNE .do_swap
 
+.no_swap
 	; what we wrote over
 	REP #$20
 	LDA.w DungeonMapFloorCountData, X
@@ -70,15 +76,20 @@ CheckSwitchMap:
 	CLC : ADC.b $00
 	RTL
 
-+	PHA
+.do_swap
 	TXA
+.try_next
 	ASL A
 	TAX
-	PLA
+	LDA.b $F6
 	BIT.b #$20
 	BNE +
 	INX
-+	LDA.l DungeonMapData.prev, X
++
+
+	LDA.l DungeonMapData.prev, X
+	JSL IsValidDungeonToSwapTo
+	BCC .try_next
 	STA.w DungeonID
 
 	LDA.b #$04
@@ -87,6 +98,58 @@ CheckSwitchMap:
 	LDA.w #$0000
 	RTL
 
+; in A = dungeon ID to check
+; out C - CC = not valid, CS = valid
+IsValidDungeonToSwapTo:
+	CMP.l CachedDungeonID ; dungeon we're in is always valid
+	BNE +
+		SEC
+		RTL
++
+
+	PHP
+	REP #$20
+	PHX : PHA
+	TAX
+
+	LDA.l MapSwapping
+	BIT.w #$0080
+	BNE .yes
+
+	BIT.w #$0001
+	BEQ +
+	; check visited flag
+	LDA.l SwapMasks, X
+	AND.l DungeonVisited
+	BNE .yes
++
+
+	LDA.l MapSwapping : BIT.w #$0002
+	BEQ +
+	; check map flag
+	LDA.l SwapMasks, X
+	AND.l MapField
+	BNE .yes
++
+
+.no
+	PLA : PLX
+	PLP
+	CLC
+	RTL
+
+.yes
+	PLA : PLX
+	PLP
+	SEC
+	RTL
+
+SwapMasks:
+	dw $C000, $C000, $2000, $1000
+	dw $0800, $0400, $0200, $0100
+	dw $0080, $0040, $0020, $0010
+	dw $0008, $0004, $0002, $0001
+
 DungeonMapSwitch_Submodule:
 	JSL $80893D
 	JSL $80833F
@@ -224,39 +287,32 @@ DrawDungeonLabel:
 	CLC : ADC.w #$0008
 	TAY
 
+	LDA.l MapSwapping
+	BEQ +
 	; L/R switch indicators
-	LDA.w #$E310
+	LDA.w #$E360
 	STA.w GFXStripes+$02, Y
-	LDA.w #$E910
+	LDA.w #$E960
 	STA.w GFXStripes+$0A, Y
-	LDA.w #$E318
-	STA.w GFXStripes+$12, Y
-	LDA.w #$E918
-	STA.w GFXStripes+$1A, Y
 
 	LDA.w #$0300
 	STA.w GFXStripes+$04, Y
 	STA.w GFXStripes+$0C, Y
-	STA.w GFXStripes+$14, Y
-	STA.w GFXStripes+$1C, Y
 
-	LDA.w #$49AF
+	LDA.w #$65BF
 	STA.w GFXStripes+$06, Y
-	STA.w GFXStripes+$16, Y
+	LDA.w #$25BD
-	LDA.w #$099E
 	STA.w GFXStripes+$08, Y
-	STA.w GFXStripes+$18, Y
 
-	LDA.w #$099F
+	LDA.w #$25BE
 	STA.w GFXStripes+$0E, Y
-	STA.w GFXStripes+$1E, Y
+	LDA.w #$25BF
-	LDA.w #$09AF
 	STA.w GFXStripes+$10, Y
-	STA.w GFXStripes+$20, Y
 
 	TYA
-	CLC : ADC.w #$0020
+	CLC : ADC.w #$0010
 	TAY
++
 
 	LDA.l DRMode
 	BNE .doors

menu/hudalpha.asm

@@ -9,7 +9,7 @@ UploadMenuOnlyIcons:
     REP #$20
     LDA.w #MenuOnlyIcons : STA.w $4342
     LDA.w #$1801 : STA.w $4340
-    LDA.w #$0310 : STA.w $4345
+    LDA.w #$0400 : STA.w $4345
     LDA.w #$0F800>>1 : STA.w $2116
 
     SEP #$20

sram.asm

@@ -240,7 +240,9 @@ CompassCountDisplay: skip 2     ; Compass count display flags (bitfield)
                                 ; High Byte: x c e d a s p m
                                 ; x = Sewers       | c = Hyrule Castle | e = Eastern Palace | d = Desert Palace
                                 ; a = Castle Tower | s = Swamp Palace  | p = PoD            | m = Mire
-skip 10                         ;
+DungeonVisited: skip 2          ; Whether each dungeon has been entered (bitfield)
+                                ; same order of bits as CompassCountDisplay above
+skip 8                          ;
 Aga2Duck: skip 1                ; Used in lieu of pyramid hole for checking if the duck should come
                                 ; 0 = Haven't called post-Aga 2 bird | 1 = Have called post-Aga 2 bird
 NpcFlags: skip 2                ; l - c s t k z o (bitfield)