Routines
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40054: 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 (1 to 8, see MessageTable)
D Argument (the sector number for message 1)
QueueMessage 40054 LD HL,38508 Point HL at the queue.
40057 LD B,8 There are eight places in the queue.
QueueMessage_Search 40059 LD A,(HL) Fetch the message number of the entry.
40060 AND A Jump if the entry is free.
40061 JR Z,QueueMessage_Store
40063 INC HL Move on to the next entry...
40064 INC HL ...which is two bytes further on.
40065 DJNZ QueueMessage_Search Loop back until every entry has been checked.
40067 RET Return, as the queue is full.
QueueMessage_Store 40068 LD (HL),E Store the message number.
40069 INC HL Move on to the argument.
40070 LD (HL),D Store the argument.
40071 RET Return.
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