Routines
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9C76: Queue Message
Used by the routines at AttackSector, SendProgramPacket, CheckBatteryLow, ReduceSectorEnergy and MoveProgramPacket.
Adds a message to the queue of messages that are shown in the message area. The queue holds eight messages, and if it is full then the message is lost.
Input
E Message number (01 to 08, see MessageTable)
D Argument (the sector number for message 01)
QueueMessage 9C76 LD HL,$966C Point HL at the queue.
9C79 LD B,$08 There are eight places in the queue.
QueueMessage_Search 9C7B LD A,(HL) Fetch the message number of the entry.
9C7C AND A Jump if the entry is free.
9C7D JR Z,QueueMessage_Store
9C7F INC HL Move on to the next entry...
9C80 INC HL ...which is two bytes further on.
9C81 DJNZ QueueMessage_Search Loop back until every entry has been checked.
9C83 RET Return, as the queue is full.
QueueMessage_Store 9C84 LD (HL),E Store the message number.
9C85 INC HL Move on to the argument.
9C86 LD (HL),D Store the argument.
9C87 RET Return.
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