The me2 subroutine - Elite on the BBC Micro and NES

       Name: me2                                                     [Show more]
       Type: Subroutine
   Category: Text
    Summary: Remove an in-flight message from the space view
    Context: See this subroutine in context in the source code
 Variations: See code variations for this subroutine in the different versions
 References: This subroutine is called as follows:
             * Main game loop (Part 2 of 6) calls me2


.me2

 LDA MCH                \ Fetch the token number of the current message into A

 JSR MESS               \ Call MESS to print the token, which will remove it
                        \ from the screen as printing uses EOR logic

 LDA #0                 \ Set the delay in DLY to 0, so any new in-flight
 STA DLY                \ messages will be shown instantly

 JMP me3                \ Jump back into the main spawning loop at me3

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Variable DLY in workspace WP

In-flight message delay

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Variable MCH in workspace WP

The text token number of the in-flight message that is currently being shown, and which will be removed by the me2 routine when the counter in DLY reaches zero

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Subroutine MESS (category: Text)

Display an in-flight message

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Entry point me3 in subroutine Main game loop (Part 2 of 6) (category: Main loop)

Used by me2 to jump back into the main game loop after printing an in-flight message

Text: me2

[BBC Micro cassette version]