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Routines |
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Used by the routine at MainMenu_SelectOptions.
Pulse the menu by briefly inverting the key-scan wait at FC80 The normal opcode there is
JR Z (28), which loops at Wait_KeyWithMenuMusic_Loop while KEY_SCAN reports no key; writing JR NZ (20) inverts that sense for one Wait_KeyWithMenuMusic tick so the highlight flashes, then 28 is restored.
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| Pulse_MenuTiming | F5EA | LD A,$20 | Write 20 (JR NZ) over the opcode at FC80. |
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| F5EC | LD ($FC80),A | |||
| F5EF | CALL Wait_KeyWithMenuMusic | Call Wait_KeyWithMenuMusic for one inverted wait tick. | ||
| F5F2 | LD A,$28 | Write 28 (JR Z) back to FC80. |
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| F5F4 | LD ($FC80),A | |||
| F5F7 | RET | Return. | ||
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JR NZ, wait one tick, then restoreJR Z.