| Routines

7C8F: Check whether a signal has been raised

Used by the routines at 7CAB, 7EF1 and F073. Returns with the zero flag reset if the signal has been raised.
Input
A | Event identifier
H | Character number (0xB7-0xD1)
7C8F | CALL $7C75 | Convert the event ID into an appropriate bit mask
7C92 | AND (HL) | Set the zero flag if the signal for this event hasn't been raised (HL=7F80 or 7F81)
7C93 | EX DE,HL | Restore the character number to H
7C94 | RET | Return with the zero flag set if the signal hasn't been raised