Open GT by killing deadrocks

LTTP_RND_GeneralBugfixes.asm

@@ -165,6 +165,7 @@ incsrc zoom_on_carry.asm
 incsrc iframes.asm
 incsrc improve_items.asm
 incsrc 2waymirror.asm
+incsrc deadrocks.asm
 warnpc $A58000
 
 org $A28000

deadrocks.asm

@@ -0,0 +1,50 @@
+pushpc
+
+org $86EDD1
+JSL CheckTransform
+BRA + : NOP : +
+
+org $86EF9A
+JSL SpriteDeath
+NOP
+
+pullpc
+
+CheckTransform:
+	CMP.b #$8F
+	BNE .skip
+
+	LDA.w $0E20, X
+	PHA
+	LDA.b #$8F
+	STA.w $0E20, X
+	JSL.l $8DB818
+
+	PLA
+	STA.w $0DE0, X
+	LDA.b #$8F
+	RTL
+
+.skip
+	STA.w $0E20, X
+	JSL.l $8DB818
+	RTL
+
+SpriteDeath:
+	LDA.w $0E20, X
+	CMP.b #$8F
+	BNE .done; not blob
+	LDA.w $0DE0, X
+	CMP.b #$27
+	BNE .done; blob that was formerly not a deadrock
+	LDA.l DeadrockCounter
+	CMP.b #$FF
+	BEQ .done ; deadrock counter maxed
+	INC
+	STA.l DeadrockCounter
+
+.done
+	; what we wrote over
+	LDY.w $0E20, X
+	CPY.b #$1B
+RTL

sram.asm

@@ -321,7 +321,8 @@ DungeonsCompleted: skip 2       ; Bitfield indicating whether a dungeon's prize
                                 ; This has the same shape as the dungeon item bitfields.
 MapCountDisplay: skip 2         ;
 CrystalCounter: skip 2          ; Total Number of crystals collected (integer)
-skip 40                         ; Unused
+DeadrockCounter: skip 2         ; Number of deadrocks killed
+skip 38                         ; Unused
 ServiceSequence:                ; See servicerequest.asm
 ServiceSequenceRx: skip 8       ; Service sequence receive
 ServiceSequenceTx: skip 8       ; Service sequence transmit

tables.asm

@@ -922,7 +922,7 @@ dw $00D8        ; 216
 
 org $B08198             ; PC 0x180198-0x1801A9
 GanonsTowerOpenAddress: ; 0x180198-0x180199
-dw CrystalCounter       ; Target address for GT open check
+dw DeadrockCounter      ; Target address for GT open check
 GanonsTowerOpenTarget:  ; 0x18019A-0x18019B
 dw $0007                ; Target amount for GT open modes to compare
 GanonsTowerOpenMode:    ; 0x18019C-0x18019D