Inverted mountain cave starts on overworld

entrances.asm

@@ -112,6 +112,32 @@ AllowStartFromSingleEntranceCave:
 		.done
 	PLA
 RTL
+;--------------------------------------------------------------------------------
+AllowStartFromExit:
+
+	LDX $1CE8
+	LDA.l ShouldStartatExit, X : BNE .doStart
+
+	LDA.l $7EF3C8 ; what we wrote over
+JML.l AllowStartFromExitReturn
+
+	.doStart
+
+	LDA.l $028481, X ;Module_LocationMenu_starting_points
+	ASL : TAX
+
+	LDA.l $02D8D2, X : STA $A0
+	LDA.l $02D8D3, X : STA $A1
+
+	; Go to pre-overworld mode
+	LDA.b #$08 : STA $10
+
+	STZ $11
+	STZ $B0
+
+	STZ $04AA
+RTL
+
 ;--------------------------------------------------------------------------------
 CheckHole:
 	LDX.w #$0024

hooks.asm

@@ -240,6 +240,10 @@ JSL.l DecideIfBunnyByScreenIndex : db #$D0 ; BNE
 org $02D9B9 ; <- 159B9 - Bank02.asm : 11089  (LDA $7EF3C8)
 JSL AllowStartFromSingleEntranceCave
 ;--------------------------------------------------------------------------------
+org $028496 ; <- 15496 - Bank02.asm : 959  (LDA $7EF3C8 : PHA)
+JML.l AllowStartFromExit
+AllowStartFromExitReturn:
+;--------------------------------------------------------------------------------
 org $1bc2a7 ; <- DC2A7 - Bank1B.asm : 1143 (Overworld_CreatePyramidHole:)
 JSL.l Overworld_CreatePyramidHoleModified
 RTL

sandbox.asm

@@ -236,6 +236,9 @@ org $02E07C+$06 : db $f2
 org $02E0CB+$06+$06 : dw $0000
 org $02E169+$06+$06 : dw $0000
 
+
+org $308350 : db $00, $00, $01 ; Death mountain cave should start on overworld
+
 ;(0x????,0x1B,0x0130,0x060a,0x0716,0x0672,0x07f8,0x0681,0x0803,0x0c,0x02,xx,xx)
 ; Exit table cryptic documentation:
 ;??|$15D8A-$15E27 - (0x4F entries, 2 bytes each) - Rooms that exit to overworld Areas ("Room" in HM)

tables.asm

@@ -948,7 +948,7 @@ dw $0000 : db $00 : dw $0000, $0000, $0000, $0000, $0000, $0000, $0000 : db $00,
 ; 0x1802A0 - 0x1802FF (unused)
 ;--------------------------------------------------------------------------------
 ; $308300 (0x180300) - $30834F (0x18034F)
-org $308300 ; PC 0x180250
+org $308300 ; PC 0x180300
 ExtraHole_Map16:
 dw $FFFF, $FFFF, $FFFF, $FFFF, $FFFF, $FFFF, $FFFF, $FFFF
 dw $FFFF, $FFFF, $FFFF, $FFFF, $FFFF, $FFFF, $FFFF, $FFFF
@@ -958,6 +958,13 @@ dw $FFFF, $FFFF, $FFFF, $FFFF, $FFFF, $FFFF, $FFFF, $FFFF
 ExtraHole_Entrance:
 db $00, $00, $00, $00, $00, $00, $00, $00
 db $00, $00, $00, $00, $00, $00, $00, $00
+;--------------------------------------------------------------------------------
+; $308350 (0x180350) - $30834F (0x18034F)
+; Correspond to the three start options
+; do not set for a starting location that is using a single entrance cave
+org $308350 ; PC 0x180350
+ShouldStartatExit:
+db $00, $00, $00
 ;================================================================================
 ; 0x180350 - 0x1814FF (unused)
 ;================================================================================