Change GT2 music to only play upstairs

events.asm

@@ -207,13 +207,6 @@ RTL
 PostItemAnimation:
 	LDA.b #$00 : STA !ITEM_BUSY ; mark item as finished
 
-	LDA $02D8 : CMP #$32 : BNE +	; Big Key
-	LDA $1B : BEQ +					; Check that we're indoors
-	LDA $040C : CMP #$1A : BNE +	; Check that we're in Ganon's Tower
-		LDA !REG_MSU_FALLBACK_TABLE+7 : AND #$04 : BEQ +
-		LDA.b #59 : STA !REG_MUSIC_CONTROL_REQUEST
-	+
-
 	LDA $7F509F : BEQ +
 		STZ $1CF0 : STZ $1CF1 ; reset decompression buffer
 		JSL.l Main_ShowTextMessage_Alt

hooks.asm

@@ -1447,6 +1447,15 @@ org $0080D7 ; <- D7 - Bank00.asm:172 (SEP #$30)
 JML msu_main : NOP
 spc_continue:
 
+org $028B7A ; <- C220 A5A0 - Bank02.asm:2225 (REP #$20 : LDA $A0)
+JSL SpiralStairsPreCheck
+
+org $029069 ; <- A21C A5A0 - Bank02.asm:3081 (LDX.b #$1C : LDA $A0)
+JSL SpiralStairsPostCheck
+
+org $02D6E8 ; <- 9C0A01 - Bank02.asm:10811 (STZ $010A)
+NOP #3
+
 org $08C421 ; <- AD4021 F005 - ancilla_receive_item.asm:108 (LDA $2140 : BEQ .wait_for_music)
 JML pendant_fanfare : NOP
 pendant_continue:

msu.asm

@@ -146,8 +146,14 @@
 
 CheckMusicLoadRequest:
     PHP : REP #$10 : PHA : PHX : PHY
-        LDA !REG_MUSIC_CONTROL_REQUEST : BEQ .skip : BMI .skip : CMP !REG_CURRENT_COMMAND : BNE .continue
+        LDA !REG_MUSIC_CONTROL_REQUEST : BEQ .skip+3 : BMI .skip+3
+        CMP !REG_CURRENT_COMMAND : BNE .continue
+        CMP.b #22 : BNE .continue   ; Check GT when mirroring from upstairs
+        LDA !REG_CURRENT_MSU_TRACK : CMP.b #59 : BNE .skip
+        LDA.b #$00 : STA !REG_CURRENT_COMMAND
+        BRA .continue
 .skip
+        LDA !REG_MUSIC_CONTROL_REQUEST
         STA !REG_MUSIC_CONTROL : STZ !REG_MUSIC_CONTROL_REQUEST
     PLY : PLX : PLA : PLP
     RTL
@@ -170,9 +176,7 @@ CheckMusicLoadRequest:
                 + : LDA !REG_MSU_PACK_CURRENT : STA !REG_MSU_PACK_REQUEST
             ++ : STA !REG_MSU_PACK_CURRENT
             JSL msu_init_check_fallback
-
-        ; Shut down NMI until music loads
-        +++ : STZ $4200
+        +++
 
         LDA !REG_MUSIC_CONTROL_REQUEST : CMP #$08 : BEQ ++  ; Mirror SFX is not affected by NoBGM or pack $FE
             LDA NoBGM : BNE +
@@ -224,13 +228,6 @@ CheckMusicLoadRequest:
             CMP.b #$08 : BNE .check_fallback  ; Hyrule Castle 2
 .dungeon
             LDA $040C : LSR : !ADD.b #33 : STA !REG_MUSIC_CONTROL_REQUEST
-            CMP.b #46 : BNE .check_fallback
-    
-            ; Ganon's Tower
-            LDA $7EF366 : AND.b #$04 : BEQ .check_fallback                      ; Check if we have the GT big key
-            LDA !REG_MSU_FALLBACK_TABLE+7 : AND.b #$04 : BEQ .check_fallback    ; Check if the 2nd GT track exists
-            LDA.b #59
-            STA !REG_MUSIC_CONTROL_REQUEST
 
 .check_fallback
             LDA !REG_MUSIC_CONTROL_REQUEST : DEC : PHA