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8B3E: Action : Updates screen with item that has been switched on.
Used by the routine at Action0E_HelpOn.
Input
BC Position (x,y) of item to update.
Output
Action_Update 8B3E LD (BitmapX),BC Set up bitmap draw with position.
8B42 LD A,$70 Make sure the OFF switch is XOR'd from the screen.
8B44 CALL Bitmap16Draw
8B47 LD A,$71 Draw the ON switch.
8B49 CALL Bitmap16Draw
8B4A XOR $AA Set position of switch.
8B4C PUSH HL
8B4D LD BC,$320A
8B50 LD DE,$050A
8B53 LD HL,$1414
8B56 CALL Beep_Effect
8B59 POP HL
8B5A JP Room_TestEvents_0
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