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B1AC: Waits for a key to be pressed.
Used by the routines at Screen_Losr, Screen_Congrats and Screen_FinalScore.
Input
Output
Key_WaitAny B1AC XOR A Hold off if a key is already being pressed. Wait for key up.
B1AD IN A,($FE)
B1AF OR $E0
B1B1 CP $FF
B1B3 JR NZ,Key_WaitAny
Key_WaitAny_0 B1B5 XOR A
B1B6 IN A,($FE)
B1B8 OR $E0 Wait for another key to be pressed.
B1BA CP $FF
B1BC JR Z,Key_WaitAny_0
B1BE RET
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