Fix Kholdstare shell collision at Lanmo 2 or other tiles where the shell could limit movement.

doorrando/bugfix/kholdstare_shell_collision.asm

@@ -0,0 +1,51 @@
+pushpc
+
+org $9E9463
+JSL CheckKholdShellCoordinates
+BCC Sprite_A3_KholdstareShell_link_not_close
+BRA Sprite_A3_KholdstareShell_link_close
+NOP #13
+
+Sprite_A3_KholdstareShell_link_close = $9E9478
+Sprite_A3_KholdstareShell_link_not_close = $9E9480
+
+pullpc
+
+CheckKholdShellCoordinates:
+
+LDA.w $0D30, X
+XBA
+LDA.w $0D10, X  ; full 16 bit X coordinate of sprite
+
+REP #$21
+SBC.w #$0020
+CMP.b $22
+BCS .not_colliding
+
+ADC.w #$0040
+CMP.b $22
+BCC .not_colliding
+
+SEP #$20
+LDA.w $0D20, X
+XBA
+LDA.w $0D00, X  ; full 16 bit Y coordinate of sprite
+
+REP #$21
+SBC.w #$001F  ; could go to 27 and let link squeeze in at Lanmo 2 (please adjust the following one)
+CMP.b $20
+BCS .not_colliding
+
+ADC.w #$0037
+CMP.b $20
+BCC .not_colliding
+
+SEP #$20  ; collision detected
+SEC
+RTL
+
+.not_colliding
+SEP #$30
+CLC
+RTL
+

doorrando/doorrando.asm

@@ -58,6 +58,7 @@ incsrc math.asm
 incsrc hudadditions.asm
 incsrc dr_lobby.asm
 incsrc entrance_fixes.asm
+incsrc bugfix/kholdstare_shell_collision.asm
 warnpc $A79C00
 
 incsrc doortables.asm