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Routines |
| A | Event identifier |
| H | Character number (183-214) |
| 31887 | CALL 31861 | Convert the event ID into an appropriate bit mask |
| 31890 | AND (HL) | Set the zero flag if the event hasn't occurred (HL=32640 or 32641) |
| 31891 | EX DE,HL | Restore the character number to H |
| 31892 | RET | Return with the zero flag set if the event hasn't occurred |