Routines
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64632: Wait For Key With Menu Music
Used by the routines at MainMenu_ChooseLearnerOrSuper, MainMenu_SelectOptions and Pulse_MenuTiming.
Disable interrupts and wait until KEY_SCAN reports a key, playing one Play_MenuMusicTick music tick per loop. Game start falls through from Seed_MenuMusicAndWaitForKey; the menu calls this entry for a single wait tick.
Wait_KeyWithMenuMusic 64632 DI Disable interrupts.
Key-scan wait loop with menu music.
Wait_KeyWithMenuMusic_Loop 64633 CALL Play_MenuMusicTick Call Play_MenuMusicTick to play one menu-music tick.
64636 CALL 654 Call KEY_SCAN.
64639 INC E Increment E by one (KEY_SCAN returns 255 in E when no key).
64640 JR Z,Wait_KeyWithMenuMusic_Loop Jump to Wait_KeyWithMenuMusic_Loop if E wrapped to 0 (no key yet).
64642 NOP No operation.
64643 RET Return.
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