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Routines |
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Used by the routine at SCAN_KEYBOARD.
About 26,000 T-states, or 7.4ms. SCAN_KEYBOARD calls it every time, so while the game sits at its prompt this is 88% of everything it does -- idle, not work, but it is also the reason a scan is too expensive to call from inside the drawing code as it stands.
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| DEBOUNCE_DELAY | 8B78 | LD BC,$03E8 | 1000 times round a four-instruction loop: about 26,000 T-states | |
| DEBOUNCE_DELAY_0 | 8B7B | DEC BC | ||
| 8B7C | LD A,B | |||
| 8B7D | OR C | |||
| 8B7E | JR NZ,DEBOUNCE_DELAY_0 | |||
| 8B80 | RET | |||
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