MirrorScroll block erase removed

Standard+Crossed ammo issue addressed
Fix for vitreous' eye dropping keys
Fix for vanilla linking doors (hc back hallway)

asm/drhooks.asm

@@ -11,12 +11,14 @@ jsl AdjustTransition
 nop
 
 ;turn off linking doors -- see .notRoomLinkDoor label in Bank02.asm
-org $02b5a6
-bra NotLinkDoor1
+org $02b5a8 ; <- 135a8 - Bank02.asm : 8368 (LDA $7EC004 : STA $A0)
+jsl CheckLinkDoorR
+bcc NotLinkDoor1
 org $02b5b6
 NotLinkDoor1:
-org $02b647
-bra NotLinkDoor2
+org $02b649 ; <- 135a8 - Bank02.asm : 8482 (LDA $7EC004 : STA $A0)
+jsl CheckLinkDoorL
+bcc NotLinkDoor2
 org $02b657
 NotLinkDoor2:
 
@@ -77,10 +79,16 @@ org $2081f2
 jsl MirrorCheckOverride2
 org $20825c
 jsl MirrorCheckOverride2
+org $07a955 ; <- Bank07.asm : around 6564 (JP is a bit different) (STZ $05FC : STZ $05FD)
+jsl BlockEraseFix
+nop #2
 
 org $02b82a
 jsl FixShopCode
 
+org $1ddeea ; <- Bank1D.asm : 286 (JSL Sprite_LoadProperties)
+jsl VitreousKeyReset
+
 
 ; These two, if enabled together, have implications for vanilla BK doors in IP/Hera/Mire
 ; IPBJ is common enough to consider not doing this. Mire is not a concern for vanilla - maybe glitched modes

asm/normal.asm

@@ -42,6 +42,20 @@ WarpDown:
 	jsr Cleanup
 	rtl
 
+; carry set = use link door like normal
+; carry clear = we are in dr mode, never use linking doors
+CheckLinkDoorR:
+    lda DRMode : bne +
+        lda $7ec004 : sta $a0 ; what we wrote over
+        sec : rtl
+    + clc : rtl
+
+CheckLinkDoorL:
+    lda DRMode : bne +
+        lda $7ec003 : sta $a0 ; what we wrote over
+        sec : rtl
+    + clc : rtl
+
 TrapDoorFixer:
     lda $fe : and #$0038 : beq .end
     xba : asl #2 : sta $00

asm/overrides.asm

@@ -52,7 +52,19 @@ MirrorCheckOverride:
 MirrorCheckOverride2:
     lda $7ef353 : and #$02 : rtl
 
+
+BlockEraseFix:
+    lda $7ef353 : and #$02 : beq +
+        stz $05fc : stz $05fd
+    + rtl
+
 FixShopCode:
     cpx #$300 : !bge +
         sta $7ef000, x
-    + rtl
+    + rtl
+
+VitreousKeyReset:
+    lda DRMode : beq +
+        stz $0cba, x
+    + jsl $0db818 ;restore old code
+    rtl